Saturday, 26 March 2016

XGate Update - Raspberry Pi GPIO

I've been updating the UHF/HF "X-Gate" to correct a limitation in the system - the ability to control the channel being used on the HF radio via the UHF port.

In the basic X-Gate the HF radio is set on one fixed frequency where it remains. If conditions change, or interference appears, it isn't possible to move the frequency of the HF radio remotely, via the X-Gate system's UHF port.

Some background on the X-Gate so far


The initial functionality:
  • HF port Syllabic Squelch to control HF > UHF gating
  • UHF port CTCSS access control (77Hz)
  • UHF port normal FT-8900 "squelch" line to control UHF>HF gating
  • UHF port DTMF control of "talkthrough enabled" - each direction (HF-UHF and UHF-HF) can be enabled/disabled independantly.
The Syllabic Squelch is necessary to avoid the problems of using an AGC derived "signal strength" squelch for detecting HF SSB voice signals. Setting an AGC Squelch to mute background noise generally prevents weak, but workable, HF SSB signals from opening the squelch. Steady carriers, noise and data signals can open an AGC Squelch if strong enough, which is undesirable. A Syllabic Squelch should respond only to human speech patterns, and can be quite sensitive to voice modulation. Weak speech signals can be detected and strong carriers/data signals and noise should be ignored.

My first version of Syllabic Squelch for the X-Gate was a kit from eBay which turned out to be a close copy of the NAVAL VOS4 design. I wasn't happy with the performance so I built a different Syllabic Squelch. The new squelch is based on the article published in 73 MagazineSmart Squelch for SSB - which itself is based on the Motorola Micom "Constant SINAD Squelch" circuit from their old range of HF SSB radios. This design works much better than the "Naval VOS4".

The subject of Syllabic Squelches in more detail is better left for another day.

My inspiration for the X-Gate was the Barrett 2062 and this uses DTMF control on the "VHF Network" to "link and unlink the VHF and HF networks". I had to include a DTMF decoder too! I use a kit from Cstech. DTMF commands are used to enable & disable the X-Gate's gating between HF and UHF just as the Barrett device. The Barrett device also allows control via CCIR493-4 selcall over the "HF Network" but that's
  1. Beyond the scope of this simple system
  2. Not required anyway - I don't want HF users to have any control of my personal X-Gate
The Cstech DTMF decoder module provides 6 addressable open collector switched outputs. In the initial version of the X-Gate "DTMF 1" enables the UHF PTT line - and therefore allows HF received signals to be gated out onto the UHF channel.  This allows "HF Monitoring" without allowing any HF transmissions. "DTMF 2" enables the HF PTT line and therefore allows UHF signals to be gated out onto HF. Setting both DTMF 1 & 2 ON gives full bi-directional gating between UHF and HF.

Update March 2016 - adding HF Channel Change


I was keen to find a method of changing the HF radio channel remotely.

DTMF  is the only simple method of communicating between a UHF handheld and the X-Gate system. How best to extend the existing DTMF functionality to add "HF radio frequency-control"?

I've already written Python software to control Icom CiV radios, and already had a Raspberry Pi connected by RS232/CiV to the IC-7200 HF radio.

It was obvious that the RPi could be the solution - but how best to do it?

One option was to have the RPi decode DTMF sequences. This would allow me to send new HF frequencies via DTMF and would allow complete freedom for choice of the HF frequency but it looked like a bigger project than I wanted to get involved with. I'd need a USB soundcard for the Pi and faced a steep learning curve to find/modify/write software for a "DTMF decoder" to use in the overall system.

The X-Gate already has it's own DTMF decoder module, which provides 6 switched output lines, 2 of which are already used to control talkthrough. I could interface the remaining 4 outputs directly to the RPi GPIO and use them as a 4-bit "memory channel" binary number, giving up to 16 pre-set channels.

Python code to read the state of 4 GPIO lines looked easier to write than Python code to decode "live" DTMF audio sequences.

I found various tutorials on using the RPI GPIO interface and wrote some code that uses the Python RPi.GPIO module.

The basic functionality:
  • User turns ON or OFF the 4 DTMF controlled outputs, one at a time, to set a new 4-bit "memory channel"
  • The 4 DTMF output lines are connected to 4 RPi GPIO lines and are polled every 10 seconds
  • The state (high/low) of the 4 GPIO lines provides a channel number between 0 and 15
  • The frequency and mode for the required memory channel is read from a text configuration file
  • If the frequency or mode of the channel being requested has changed from that of the last GPIO poll then a CiV command is sent to the IC7200 to set the new frequency & mode.
DTMF lines 3,4,5 & 6 were used for the 4-bit channel address.



The channel select DTMF Keys
3 = "bit 4" (add 8), 4 = "bit 3" (add 4), 5 = "bit 2" (add 2) and 6 = "bit 1" (add 1)

I used the RPi GPIO ports:

"bit 1" (DTMF 6) => GPIO26 (RPi pin 37)
"bit 2" (DTMF 5) => GPIO19 (RPi pin 35)
"bit 3" (DTMF 4) => GPIO13 (RPi pin 33)
"bit 4" (DTMF 3) => GPIO6 (RPi pin 31)
"Ground" => (RPi pin 39)

Example : Channel number <> DTMF conversion

Channel 5 = 0101 = "3 OFF, 4 ON, 5 OFF, 6 ON"
Channel 13 = 1101 = "3 ON, 4 ON, 5 OFF, 6 ON"

To turn an output on (e.g. output 4) : 4*
To turn an output off : 4#

It's a little cumbersome - for example to request channel 7 (binary 0111) you need to send the following sequence of DTMF characters

3#
4*
5*
6*

Between each command the DTMF board sends a revertive over the UHF radio - in Morse code, so the sequence would be:
  1. (TX UHF DTMF) : 3 #
  2. (RX UHF CW revertive) : 3 OFF
  3. (TX UHF DTMF) : 4 *
  4. (RX UHF CW revertive) : 4 ON
  5. (TX UHF DTMF) : 5 *
  6. (RX UHF CW revertive) : 5 ON 
  7. (TX UHF DTMF) : 6 *
  8. (RX UHF CW revertive) : 6 ON
To select channel 15 from this point only requires the MSB (output 3) to be turned ON:

(TX UHF DTMF) : 3 *
(RX UHF CW revertive) : 3 ON
  1. It is difficult to keep track of which channel is already selected as there's no way to interrogate the X-Gate to find out the channel selected.
  2. To ensure you know where you are the safest way is to select Channel 0 (all DTMF lines OFF) "3# / 4# / 5# / 6#" first, and then to set the bits for the new channel 
  3. 16 Channels is too many to remember and sending 4-bits it too cumbersome.

Modification to 8 Channels and the "QSY" bit

I decided to restrict the channels to 8, requiring only 3 address bits. The 4-th bit (mapped to DTMF 3) could still be useful. Occasionally it might be necessary to move only a few kHz on HF, to clear some QRM etc. Setting "DTMF 3" ON could be interpreted as "QSY a few kHz". The definition of "a few kHz" is set in the software - currently it's "plus 3.5kHz", except if the current frequency is on the UK 60m band - and then it's "minus 0.5kHz"

Additional functions :
  • At program startup check the current HF frequency & mode and store them to allow the same settings to be restored at program close
  • At program startup set the following options on the IC7200:
  1. DSP Noise Reduction ON
  2. DSP Auto Notch Filter ON
  3. Speech Compression ON
  4. Digi mode OFF
  5. Backlight OFF
  6. Dial Lock ON 
  7. TX power to 100
  • When a new frequency is selected a check is made to compare the new frequency with the last time an "ATU Tune" cycle was completed. If the frequency change is more than 1.5% of the "ATU Last Tuned" frequency then an ATU Tune is carried out.  The choice of "1.5%" means that small changes in frequency, such as within a band, won't trigger a Tune but larger changes, e.g. moving from band to band or relatively large fractional changes within a band will trigger an ATU Tune. For instance a jump from one of the lower 60m channels to one of the upper ones is relatively large and will require a re-tune. The ATU Tune process is: 
  1. Reduce TX Power to 25W
  2. Change mode to "RTTY"
  3. Transmit a carrier for 3 seconds
  4. Return the mode the previous setting
  5. Restore TX power to 100W 
  6. Store the current frequency as "Last Tuned" for next time
The DTMF Commands are now:
  1. Gate HF audio onto UHF (enables the UHF PTT) for monitoring the HF channel
  2. Gate UHF audio onto HF (enables the HF PTT) for full 2-way operation
  3. Control setting of the "QSY" flag - change HF Frequency within a channel
  4. MSB (bit 3) of 3-bit channel number (decimal 4)
  5. Bit 2 of 3-bit channel number (decimal 2)
  6. LSB (bit 1) of 3-bit channel number (decimal 1)
The Channels are stored as a  set of Python "lists", each has 2 components, frequency (in kHz) and Mode :

channel0 = ["3615.000", "AM"]
channel1 = ["5276.000", "USB"]
channel2 = ["5298.500", "USB"]
channel3 = ["5398.500", "USB"]
channel4 = ["14342.500", "USB"]
channel5 = ["14109.000", "USB"]
channel6 = ["18117.000", "USB"]
channel7 = ["18157.500", "USB"]


Other modifications and problems

It was found that the audio quality on HF Transmit was rather poor, with a lot of HF roll-off. This has (hopefully) been corrected by modifying the manner of obtaining UHF RX audio from the FT8900. The interface to the FT8900 is via the 6-pin mini-DIN "DATA" socket. This provides RX Audio (1200 baud packet), TX Audio, Squelch and PTT. The RX Audio from the 1200 baud packet output must have quite aggressive de-emphasis. I changed the RX Audio source to the "9600 baud" packet output and the AF frequency response on the outgoing HF channel is now flat.

A problem still remains: if there is voice modulation on the HF channel and the HF->UHF talkthrough is enabled you lose further control for the duration of the HF traffic. This can be quite perplexing if you accidentally switch to a very busy HF frequency, or one with a long "ragchew" in progress. To counteract this, and give a chance to regain control, I set the FT8900 "Time Out Timer" to 2 minutes. If an HF signal causes the UHF port to transmit continuously for more than 2 minutes the FT8900 switches back to receive, and remains there until the PTT is dropped. This gives a window of opportunity to send a "1 OFF" command and close the HF->UHF gate, or to change HF channel.

The X-Gate Python program prints stuff out, to keep track of what's happening:

========================================
Startup : Freq 5398.500, Mode USB
========================================

Initializing HF Radio.....
DSP NR Turn on... Success
DSP ANF Turn on... Success
Backlight Turn off... Success
Dial Lock Turn on... Success
Digi mode Turn off... Success
Speech Compression on.... Success
Setting Full Power... Success
========================================

****************************************
27/03/2016 11:23:21 : Channel : 2 / QSY : False
Setting HF Freq....  5298.500
Setting HF mode....  USB
Last ATU Tune Freq : 30000.000
Large freq change : 82.338 percent
ATU Tune
Tuned cycle complete
****************************************
Retuned : Freq 5298.500, Mode USB
****************************************

****************************************
27/03/2016 11:23:44 : Channel : 0 / QSY : False
Setting HF Freq....  3615.000
Setting HF mode....  AM
Last ATU Tune Freq : 5298.500
Large freq change : 31.773 percent
ATU Tune
Tuned cycle complete
****************************************
Retuned : Freq 3615.000, Mode AM
****************************************

****************************************
27/03/2016 11:24:17 : Channel : 1 / QSY : False
Setting HF Freq....  5276.000
Setting HF mode....  USB
Last ATU Tune Freq : 3615.000
Large freq change : 45.947 percent
ATU Tune
Tuned cycle complete
****************************************
Retuned : Freq 5276.000, Mode USB
****************************************

****************************************
27/03/2016 11:24:31 : Channel : 3 / QSY : False
Setting HF Freq....  5398.500
Setting HF mode....  USB
Last ATU Tune Freq : 5276.000
Large freq change : 2.322 percent
ATU Tune
Tuned cycle complete
****************************************
Retuned : Freq 5398.500, Mode USB
****************************************

****************************************
27/03/2016 11:24:44 : Channel : 7 / QSY : False
Setting HF Freq....  18157.500
Setting HF mode....  USB
Last ATU Tune Freq : 5398.500
Large freq change : 236.343 percent
ATU Tune
Tuned cycle complete
****************************************
Retuned : Freq 18157.500, Mode USB
****************************************

****************************************
27/03/2016 11:24:57 : Channel : 7 / QSY : True
Setting HF Freq....  18161.000
Setting HF mode....  USB
Last ATU Tune Freq : 18157.500
Small freq change : 0.019 percent
****************************************
Retuned : Freq 18161.000, Mode USB
****************************************

****************************************
27/03/2016 11:25:07 : Channel : 5 / QSY : True
Setting HF Freq....  14112.500
Setting HF mode....  USB
Last ATU Tune Freq : 18157.500
Large freq change : 22.277 percent
ATU Tune
Tuned cycle complete
****************************************
Retuned : Freq 14112.500, Mode USB
****************************************

exiting...
Resetting frequency...Set Freq success, 5398.500
Resetting mode....Set Mode Success, USB
DSP NR Turn off...  Success
DSP ANF Turn off...  Success
Dial Lock Turn off... Success
Backlight Turn on... Success

Monday, 7 March 2016

Icom IC-M710 remote control

I've been dabbling in Python over the last year or so, writing small projects that
  1. Help me learn to write software 
  2. Provide something I can't find anywhere else
  3. it's fun (if sometimes frustrating)
I still don't know much about writing software but I've thrown together a few useful little bits of code (useful to me, at least).

My little projects have included:

  • Serial port remote control for Icom "CiV" radios
  • Serial port remote control for AOR AR7030 RX
  • TCP/IP client/server remote control for Icom & AR7030 allowing control of multiple radios from one GUI over a network.
  • MF/HF DSC message signal generator
  • CCIR 493 Selcal tone generator
  • Serial port remote control (NMEA) for Icom IC-M710 marine radio
  • XML-RPC interface for fldigi for displaying received text on a website
  • XML-RPC interface to allow fldigi to control the IC-M710
  • UDP network interfaces, message parsing and input to a MySQL database for DSC messages received over the internet, to drive my DSC website "YaDDNet".
  • A DSC "Test Message Auto-responder" with remote TCP admin client
My recent small project is to give TCP/IP remote control of the IC-M710 marine SSB transceiver, with a small "server" program running on the PC to which the IC-M710 is connected via a serial port and a "console" client that can run anywhere with network access giving the ability to remotely change: Operating Frequency, Operating Mode, Turn display backlight on/off, Turn speaker on/off, send a 3 second low power "tune" carrier for Auto ATU tuning.





The current code, in Python 2.x is here:

M710 Client & Server

Initial work - local control by PC

The M710 is unusual in that it doesn't use Icom's normal "CiV" protocol but instead uses the marine standard NMEA protocol, using "proprietry" sentences. Once I'd got to grips with the basic format of the communication I wrote a set of Python functions to get access to the user-controllable features of the radio : Mode, RX Freq, TX Freq, TX Power, AF Gain, RF Gain, PTT, Noise Blanker, Squelch, AGC, Speaker Mute, Display dimmer. I wrote a GUI, using TKinter, to give a mimic front panel (loosely based on a Skanti TRP control head), and also a user-programmable set of "memories", in a separate floating panel.





This allows direct control of the M710. The M710, along with most other "professional" HF radios is not very user friendly as it's intended for fixed-frequency memory channels and not for rapid "tuning around" that hobby-radio users prefer. Control via PC allows for quick frequency selection, mode changing etc.

Network Server/Client

The first program requires the user to be sitting "in the shack" along with the PC and the radio. I wanted a simple client/server arrangement - no graphical interface, just the ability to change the radio frequency and mode from anywhere. The M710 is connected to my X-Gate interface which gives me the ability to use the HF radio using a UHF handheld, so I can operate on HF without needing to sit in the shed. The problem is that the X-Gate has no method to change the HF radio's frequency, requiring a trip to the shack to change the HF radio. This client/server solution means I can change the HF radio freq. & mode while sitting in the house, using my laptop, and continue to use the X-Gate for listening/operating - without frequent trips back to the shed.

I took the server & client code already written for remote (TCP/IP) control of  "normal" Icom radios and the M710 control functions already written for the "local" control and stripped out the un-needed parts to make a simple server/client giving "console" control. No doubt I could write a point & click GUI for the client, and that might be the next step.





Sunday, 18 October 2015

Icom IC-7200 USB UART/Hub

For digimodes I use an Icom IC-7200 which has a USB interface providing CiV CAT control and also RX/TX audio, via the radio's internal sound-card device. Previously this interface stopped working following a thunderstorm nearby and the radio was returned to Icom for repair, under guarantee. The symptoms were that the CAT control was not working, and in fact the USB Serial device wasn't visible to the PC when connected. The USB sound card continued to work normally. The radio came back from repair and worked perfectly, and I remember a feeling of amazement that it was possible to repair damage to component level on modern radios, rather than simply throwing away the PCB and putting in a new one. I didn't look closely at the repair, and just used the radio, happy that it was working.

April this year brought another thunderstorm overnight, and I found that the Linux PC was dead, and the IC-7200 (which had been connected via USB to the now dead PC) was also showing the same symptoms as previously - the USB Serial device wasn't detected when plugged into another (working) PC, although the USB Sound device appeared to work fine.

This time I was reluctant to send the radio away for repair - partly because it was now out of guarantee, and partly because I didn't want the hassle of shipping it back to the Dealer, or to Icom themselves, so it sat on the shelf in the shack, unused, for a few months while I got on with other things.

During a chat, on 60m Olivia, with Peter, G4VLC, he suggested I repair it myself, all I'd need to do would be to get hold of some SMD Reworking tools - hot air gun etc. and that these things were now much cheaper, thanks to the Chinese, and were now within the budget of the hobbyist. He recommended a few models, and the supplier PCB-Soldering http://www.pcb-soldering.co.uk

I bought an Aoyue 852A+ Pro hot air rework station for £93

http://www.pcb-soldering.co.uk/aoyue-852a-smd-rework-station.html

along with two new soldering irons, model 2930

http://www.pcb-soldering.co.uk/aoyue-2930-70w-soldering-station.html

Two identical irons might seem overkill, but it's useful to have two good irons for SMD work, as it makes removing/moving/replacing resitors/diodes/capacitors much easier - one iron in each hand.

I got some other sundry items - magnifying head-band from RS for £11

http://uk.rs-online.com/web/p/headband-magnifiers/8771741/

some thin leaded solder, 0.4mm diameter, flux and flux remover and a set of good tweezers.

I practiced for a couple of days, using old broken sound cards, video cards and a dead MP3 player, which between them gave me lots of different IC package styles/sizes to play with as well as lots of small resistors/diodes/transistors too. It surprised me how easy it was to do SMD work, once you have the right tools, and that all my previous attempts, with inadequate tools made it seem frighteningly difficult.

Then, yesterday, it was time to tackle the IC-7200.

I'd already looked at the circuit diagram, and identified the likely candidates - IC3201 is a USB Hub, which provides two ports in the radio - one for the soundcard and one for the UART (CAT control) and IC3203 is the USB/UART bridge. IC3201 is a USB2502-AEZG and IC3203 is a CP2102-GM. Both are "QFN" packages - with no leads, only tiny pads under the chip....!






I'd ordered a few of each chip, from RS and was ready to replace them.

I took the lid off the radio and took a couple of photos of the Main PCB, and here's a close up of the two ICs, as I found them - remember, this radio has previously been repaired at Icom UK...


The USB Hub has obvously been replaced, looking at the soldering...

Close up showing the chip in question.
Not too pretty, but it did work okay, until the second lightning damage occurred

Using my new found SMD rework skills (!) I removed both chips:





Next I replaced them both, with new chips. I think I made a neater job of the USB Hub chip, compared to the job done by Icom UK themselves. I don't think the USB UART (CP2102) had previously been replaced, but I thought it was worth changing it this time, for completeness.

After the replacement:



Powering up the radio after the repair, while connected to a Linux PC via the USB port and it was obvious everything was now working correctly. The Linux PC reported that a 2 port hub, sound codec and UART Bridge were present, and assigned device /dev/ttyUSB0 as the serial port. I connected the radio to my main Windows machine, and ran FLdigi - hey presto, full CAT control and also RX/TX audio - success!

I'm pretty pleased with my first attempt at SMD repair - it's not black magic, as long as you have the tools, which are now reasonably priced thanks to Chinese imports.

The workstation:




Monday, 23 March 2015

CCIR 493-4 HF Selective Calling

During some recent tests of a portable setup using the FT817 / MX-P50M linear / Z817H ATU and a kite antenna, as well as some other tests on 20m SSB from the Landrover while mobile, with Peter G4VLC at the far end, it was mentioned that some form of "alert" or "Selcall" would be useful so that it wasn't necessary to sit monitoring while waiting for activity.  We tried simple DTMF, but it's prone to noise, false triggering and the effects of minor frequency errors. A properly designed Selcall system for the HF bands would be better.

I found some information at the HFLink website describing what is currently known about a rather old protocol - CCIR 493-4 which was the basis of the later ITU R M.493-xx GMDSS DSC, about which I've learned a great deal over the last few years.

There's scant information about the older CCIR protocol, although it forms the basis for the majority of Selcall systems in use by "land mobile" HF users with radios from manufacturers such as Barrett, Codan etc. These manufacturers have enhanced the basic Selcall with their own in-house functions, some of which are compatible with other radios, some only work with radios of the same make. No technical details seem to have been published of these enhancements.

In its basic form CCIR493-4 is similar to MF/HF DSC - it shares the same modulation scheme (170Hz shift, 100baud FSK) the same FEC interleaving (each symbol is repeated after four other symbols), the same dotting pattern for bit sync, the same basic phasing pattern for word-sync, and a very reduced subset of "format", "category" and "EOS" symbols. I modified my Python script which I recently wrote to generate HF DSC transmissions - removing un-needed functions etc.- so that I could experiment with CCIR493-4 over the air. Unfortunately, without access to a real Selcall-equipped radio, the only way of testing was to find a software decoder that could understand the protocol. YaDD would show the symbols, but of course the overall message format is not understood by YaDD. MultiPSK has a "493-4" function as part of the "GMDSS" decoder, but only very basic messages are understood. The only other software decoder seems to be "Sorcerer" which has a wide range of modes, including various flavours of HF Selcall. I discovered quickly that Selcall has an inverted tone sense, compared to DSC, so the mark & space frequencies have been switched in the generator.

A recording of a Selcall made using the Python generator is here:
https://dl.dropboxusercontent.com/u/3551430/selcal_2.mp3

The current GUI looks like:




There is also a CW ID function, which sends "FSK CW" of arbitrary text (generally "de GM4SLV") for identification on the amateur bands. It sound like this:

https://dl.dropboxusercontent.com/u/3551430/cwid.mp3


The current version of the Python program is here:

https://dl.dropboxusercontent.com/u/3551430/selcal_gui.zip

it runs on Windows, and Linux, although I struggle with the arcane details of the Linux sound-system so I tend to use it mainly from a little Windows XP netbook. There is an initial delay before the Selcall message is transmitted, due to the calculation of every sample-value in advance. The FSK modulator uses "Continuous Phase Frequency Shift Keying" to avoid sudden phase jumps at the boundaries between bits, and at the moment the final waveform is calculated in full before being fed via the "Default Soundcard". I use a Signalink USB interface with no need for any software PTT control etc, although I have also written a version that has direct control of an Icom IC7200 using CiV commands, but that's on the back burner at the moment.

I've successfully transmitted Selcall on 60m and 30m, being received by G4VLC, also using Sorcerer to decode:

[2015-03-22 13:23:16] [ BARRETT 22/03/2015 13:23]
[2015-03-22 13:23:16] Format: Beacon Request
[2015-03-22 13:23:16] Destination Address: 1234
[2015-03-22 13:23:16] Callers Address: 5678
[2015-03-22 13:23:16] Category: Voice
[2015-03-22 13:23:16] 123 12 34 100 56 78 117

[2015-03-22 14:13:10] [ BARRETT 22/03/2015 14:13]
[2015-03-22 14:13:10] Format: Beacon Request
[2015-03-22 14:13:10] Destination Address: 5699
[2015-03-22 14:13:10] Callers Address: 5678
[2015-03-22 14:13:10] Category: Voice
[2015-03-22 14:13:10] 123 56 99 100 56 78 117

[2015-03-22 14:13:34] [ BARRETT 22/03/2015 14:13]
[2015-03-22 14:13:34] Format: Selcall
[2015-03-22 14:13:34] Destination Address: 5699
[2015-03-22 14:13:34] Callers Address: 5678
[2015-03-22 14:13:34] Category: Voice
[2015-03-22 14:13:34] 120 56 99 100 56 78 117


Now I'm hoping to find some other amateur radio Selcall users, to get more experience, and find out more about the details of the protocol. Hopefully one day we'll have a software implementation of two-way Selcall, otherwise the only way to use it is to buy a purpose-built radio - but Codan and Barrett radios don't come cheap.


Thursday, 5 March 2015

MX-P50M Amplifier for the FT817

I have been thinking about trying some portable HF work, and although I have an FT817ND, the low power output is likely to limit what is achievable from small antennas, especially on 60m and 40m. I considered building a linear amp, but I decided to take a chance on the Chinese "MX-P50M", available from several eBay sellers. There have been a few short blog reviews that give it a reasonable report, but concerns over spectral purity (harmonics and IMD) might put some people off so I thought I'd give it some tests on the bench before using it on the air.




To keep things stable during the tests I used a 12V fan to cool the amp's heatsink - which otherwise gets quite hot during lengthy periods of key-down full power.

The setup used:

FT817 - MX-P50M - power-meter - resistive power-tap - 50 ohm 100W test load

The MX-P50M was powered from a 13.8V DC supply, the FT817 from another 13.8V supply.

The power-tap (approx 50dB coupling) feeds a Rigol DSA815 spectrum analyzer.

MX-P50M Bench Tests

Max CW power and amplifier supply current. 

Each amateur band was tested at each of the 4 switchable power levels of the FT817.

Band 80m
1 : 7W 2.9A
2: 14W 4.0A
3: 29W 5.8A
4: 31W 6.1A

Band 60m
1:  7W 2.8A
2: 14W 3.9A
3: 30W 5.7A
4: 32W 5.9A

Band 40m
1:  8W 2.8A
2: 14W 3.9A
3: 29W 5.4A
4: 31W 5.6A

Band 30m:
1:  6W 2.9A
2: 12W 4.0A
3: 28W 6.2A
4: 31W 6.5A

Band 20m
1:  7W 2.7A
2: 15W 3.6A
3: 28W 5.3A
4: 35W 5.9A

Band 17m
1:  7W 2.8A
2: 14W 3.9A
3: 28W 5.7A
4: 33W 6.1A

Band 15m
1:  7W 2.7A
2: 14W 3.9A
3: 28W 5.5A
4: 35W 6.1A

Band 12m
1:  6W 2.8A
2: 13W 4.0A
3: 28W 5.7A
4: 32W 6.3A

Band 10m
1:  4W 2.9A
2: 10W 4.1A
3: 22W 6.3A
4: 29W 7.3A

The amplifier doesn't produce any more than 35W when driven by an FT817 on full power. There appears to be no benefit in setting the FT817 above power level "3", which seems to give the most consistent overall output power of around 28W CW.

Next I looked at the harmonic levels on CW, with the FT817 at power level "3" giving approx 28W output.

Harmonics 

The worst harmonics, up to 50MHz were:

Band 80m:
2F = -55dBc
5F = -58dBc




Band 60m (using the "40m LPF" of the amplifier)
3F = -53dBc
5F = -55dBc


Band 40m
2F = -56dBc
3F = -56dBc
5F = -52dBc


Band 30m
2F = -55.5dBc
3F = -34.7dBc (the worst recorded value)



Band 20m
2F = 62.9dBc
3F = 57.4dBc


Band 17m
2F = -59.4dBc


Band 15m
2F = -57.5dBc



I didn't check 12m or 10m in this test


Generally the amp is reasonably clean, the only concern is the level of 3rd harmonic on 30m,  at approx 30MHz, which is only -35dB (this is of course still a low level of around 10dBm)


Next I looked at the wideband harmonics & spurii, from DC to 200MHz.

Wideband Harmonics and Spurii


80m



60m


40m



30m



20m

11th harmonic at ~ 156MHz -56dBc



17m

7th harmonic -59dBc  
9th harmonic -54dBc



15m

2nd harmonic -56dBc
5th harmonic -59dBc
7th harmonic -52dBc



12m

5th harmonic -47dBc
7th harmonic  -54dBc


10m

3rd harmonic -53dBc
5th harmonic -38dBc



Generally clean - some harmonics on the higher bands are evident, but I assume little of this energy will be radiated, given the antenna and ATU being used. There is some close-in spurii evident on the higher bands, but this appears to be from the FT817 itself:

eg on 20m, without the amplifer:

FT817 Barefoot 20m Spurii




These results are probably no worse than any other amateur transceiver of similar power, and I don't think there's any cause for concern. The 3rd harmonic level on 30m is perhaps the only issue of note.

Next I looked at in-band IMD (classical two-tone test).

To generate the two-tones I used Spectrum Lab running on a netbook, with a Signalink USB soundcard interface to the FT817. With the FT817 set to power level "3" I adjusted the drive to give 20W single tone, which was used as the PEP reference. Then I added a second tone and reduced the drive to set each tone at -6dB from the single tone PEP reference. This keeps the output PEP the same (20W). I measured the relative level of the lower-side 3rd order IP, referenced to "0dB PEP".

Intermodulation Performance

FT817 power level "3"

PEP = 20W

Band 80m
IMD3 = -31dBpep


Band 60m
IMD3 = -31dBpep


Band 40m
IMD3 = -31dBpep


Band 30m
IMD3 = -31dBpep


Band 20m
IMD3 = -32dBpep


Band 17m
IMD3 = -31dBpep


Band 15m
IMD3 = -32dBpep


I didn't test 12m or 10m.

Next I set the FT817 to "full power" and set the drive to give 30W pep - which is the maximum generally achievable.

PEP =  30W 

Band 80m
IMD3 = -30dBpep


Band 60m
IMD3 = -30dBpep


Band 40m
IMD3 = -31dBpep


Band 30m
IMD3 = -31dBpep


Band 20m
IMD3 = -30dBpep

Band 17m
IMD3 = -29dBpep


Band 15m
IMD3 = -29dBpep



These are all "reasonable" (or at least "not awful") and I doubt that at the power levels involved that they would give much cause for concern to users of adjacent channels.

I should perhaps have checked the IMD on the FT817 output itself (perhaps another day). Looking at the ARRL test results for the 817 it appears that -32dBpep is around par for the radio itself, so the amplifier appears not to be degrading things further, which is good news. In fact looking at the ARRL data for some "high class high power" radios shows that the ARRL measured -27dBpep for the FT1000MP and -32dBpep for the 200W IC7800. -32dB below 200W from an IC7800 will certainly cause more splatter than -32dB below 30W from a portable FT817 - especially when using a simple random wire thrown over a tree.

The ARRL results for "worst case spurii" for the FT817 was -50dBc, so in general (30m 3rd harmonic aside) I don't think the MX-P50M can be seen as a dirty, cheap, Chinese amplifier since it doesn't appear to degrade the basic performance of the 817, and the spurii are no worse than those of most 100W black boxes.

All in all, I think the cheap and cheerful MX-P50M is a useful addition to the portable setup. I'd expect to limit operation to approx 25-30W simply by driving it from the FT817 at its "level 3" power setting. "Level 2" would give approx 15W pep and is still a useful 4-5dB boost up from the 3-5W of the barefoot FT817.

Now to wait for spring to finally arrive. I have plans for kite-lifted antenna portable operation.




Sunday, 28 September 2014

DSC Station List

I've been running the "YaDDNet" online DSC database/website since March 2014. Here is a list of all the stations I've received since starting the database.

==== Coast Station Totals ====

2177.0kHz : 11
2187.5kHz : 97
4207.5kHz : 15
6312.0kHz : 21
8414.5kHz : 46
12577.0kHz : 44
16804.5kHz : 33

2177.0 :
20140315 1855 2177.0 002050480 BEL Ostende Radio
20140315 1814 2177.0 002191000 DNK Lyngby Radio
20140318 1241 2177.0 002311000 FRO Torshavn Radio
20140316 1701 2177.0 002371000 GRC Olympia Radio
20140316 2239 2177.0 002510100 ISL Reykjavik Radio
20140317 1108 2177.0 002570000 NOR Public Correspondence
20140317 0625 2177.0 002570100 NOR Tjome Radio
20140315 2351 2177.0 002570300 NOR Rogaland Radio
20140316 0715 2177.0 002570500 NOR Floroe Radio
20140318 0732 2177.0 002570700 NOR Bodoe Radio
20140317 1332 2177.0 002570800 NOR Vardo Radio

2187.5 :
20140304 1358 2187.5 002050480 BEL Ostende Radio
20140304 1541 2187.5 002059981 BEL MRCC Oostende
20140304 1806 2187.5 002070810 BUL Varna Radio
20140304 2244 2187.5 002091000 CYP Cyprus Radio
20140304 1337 2187.5 002111240 DEU Bremen Radio
20140304 1203 2187.5 002191000 DNK Lyngby Radio
20140517 2212 2187.5 002240991 ESP Barcelona
20140305 0705 2187.5 002240993 ESP Finisterre MRCC
20140305 0104 2187.5 002240994 ESP Tarifa MRCC
20140426 0749 2187.5 002240996 ESP MRCC Bilbao
20140306 0746 2187.5 002241002 ESP Almeria Radio
20140306 0249 2187.5 002241007 CNR MRCC Tenerife Radio
20140304 1302 2187.5 002241022 ESP Coruna Radio
20140304 1905 2187.5 002241024 ESP Valencia Radio
20140304 1914 2187.5 002241026 CNR Las Palmas Radio
20140305 0101 2187.5 002275000 FRA CROSS Etel
20140305 1552 2187.5 002275100 FRA CROSS Gris Nez
20140305 0100 2187.5 002275200 FRA CROSS Jobourg
20140304 1524 2187.5 002275300 FRA CROSS Corsen
20140306 0026 2187.5 002275400 FRA CROSS La Garde
20140503 0500 2187.5 002275420 COR Aspretto
20140304 1428 2187.5 002301000 FIN Mariehamn Radio
20140308 0201 2187.5 002302000 FIN Helsinki Radio
20140308 1053 2187.5 002303000 FIN Raippaluoto Radio (Vaasa)
20140305 0515 2187.5 002311000 FRO Torshavn Radio
20140304 1207 2187.5 002320001 SHE Shetland Coastguard
20140304 1253 2187.5 002320004 SCT Aberdeen Coastguard
20140304 1253 2187.5 002320007 ENG Humber Coastguard
20140304 1301 2187.5 002320009 ENG Thames Coastguard
20140304 1446 2187.5 002320013 ENG Brixham Coastguard
20140304 1442 2187.5 002320014 ENG Falmouth Coastguard
20140311 2333 2187.5 002320016 WLS Swansea Coastguard
20140304 1403 2187.5 002320017 WLS Milford Haven Coastguard
20140304 1358 2187.5 002320021 NIR Belfast Coastguard
20140323 1513 2187.5 002320022 SCT Clyde Coastguard
20140304 1744 2187.5 002320024 SCT Stornoway Coastguard
20140314 1641 2187.5 002320204 ENG Snargate Radio Dover
20140304 1731 2187.5 002371000 GRC Olympia Radio
20140308 2355 2187.5 002387010 HRV Rijeka Radio
20140330 2333 2187.5 002392000 GRC Piraeus Radio
20140304 1217 2187.5 002442000 HOL Netherlands CG Radio
20140305 0018 2187.5 002470001 ITA Roma Radio
20140304 1713 2187.5 002470002 SCY Palermo Radio
20140305 0759 2187.5 002500100 IRL Malin Head Radio
20140304 1402 2187.5 002500200 IRL Valentia Radio
20140410 1832 2187.5 002500300 IRL Dublin Radio
20140304 1310 2187.5 002510100 ISL Reykjavik Radio
20140305 2007 2187.5 002570000 NOR Public Correspondence
20140305 0723 2187.5 002570100 NOR Tjome Radio
20140326 0752 2187.5 002570200 NOR Farsund Radio
20140304 1205 2187.5 002570300 NOR Rogaland Radio
20140311 0645 2187.5 002570400 NOR Bergen Radio
20140304 1204 2187.5 002570500 NOR Floroe Radio
20140305 0327 2187.5 002570700 NOR Bodoe Radio
20140305 0713 2187.5 002570800 NOR Vardo Radio
20140415 0550 2187.5 002573550 NOR Vardo VTS
20140304 1217 2187.5 002610210 POL Witowo Radio
20140325 2023 2187.5 002620001 MNE Bar Radio
20140306 0503 2187.5 002640570 ROU Constanta Radio
20140304 1300 2187.5 002652000 SWE Stockholm Radio
20140304 1159 2187.5 002653000 SWE Goteborg Radio
20140527 2220 2187.5 002653500 SWE Stockholm Radio
20140304 1641 2187.5 002711000 TUR Istanbul Radio
20140305 1542 2187.5 002712000 TUR Samsun Radio
20140307 0602 2187.5 002713000 TUR Antalya Radio
20140305 0609 2187.5 002715000 TUR Izmir Radio
20140307 0221 2187.5 002723660 UKR Odessa Radio
20140304 2123 2187.5 002733700 RUS Saint Petersburg Radio
20140304 1603 2187.5 002734411 RUS Novorossiysk Radio
20140304 1456 2187.5 002734414 RUS Arkhangelsk Radio
20140305 0616 2187.5 002734417 KAL Kaliningrad Radio
20140304 1755 2187.5 002734419 RUS Astrakhan Radio
20140310 0456 2187.5 002734420 RUS Murmansk Radio
20140311 1629 2187.5 002734423 RUS Makhachkala Radio
20140304 1604 2187.5 002734446 RUS Taman Radio
20140305 1603 2187.5 002734487 RUS Taganrog Radio
20140305 1447 2187.5 002750100 LVA Riga rescue Radio
20140914 0011 2187.5 002761000 EST Tallinn MRCC
20140305 0836 2187.5 002770330 LTU Klaipeda Rescue Centre
20140307 0547 2187.5 003100001 BER Bermuda Harbour Radio
20140305 0442 2187.5 003313000 GRL Aasiaat Radio
20140307 0032 2187.5 003669991 USA COMMSTA Boston
20140305 0649 2187.5 003669995 USA COMMSTA Portsmouth
20140306 0727 2187.5 003669997 USA COMMSTA Miami
20140310 0552 2187.5 003669998 USA COMMSTA New Orleans
20140307 1949 2187.5 004122100 CHN Shanghai Radio
20140310 1717 2187.5 004122200 CHN Qingdao Radio
20140305 1753 2187.5 004123100 CHN Guangzhou Radio
20140413 0134 2187.5 004194401 IND Chennai
20140403 2004 2187.5 004231000 AZE Baku Radio
20140306 1653 2187.5 004280001 ISR Haifa Radio
20140306 1746 2187.5 004661010 QAT Doha Radio
20140305 1745 2187.5 005671000 THA Bangkok Radio
20140311 2104 2187.5 005741040 VTN Hai Phong Radio
20140305 0730 2187.5 006052110 ALG Alger Radio
20140315 2234 2187.5 006221111 EGY Alexandria Radio
20140304 1737 2187.5 006221112 EGY Kosseir Radio

4207.5 :
20140304 1807 4207.5 002070810 BUL Varna Radio
20140314 1632 4207.5 002091000 CYP Cyprus Radio
20140312 1602 4207.5 002320204 ENG Snargate Radio Dover
20140306 0017 4207.5 002371000 GRC Olympia Radio
20140304 1827 4207.5 002711000 TUR Istanbul Radio
20140414 0620 4207.5 003669990 USA CAMSPAC Pt Reyes
20140307 0847 4207.5 003669991 USA COMMSTA Boston
20140304 2254 4207.5 003669995 USA COMMSTA Portsmouth
20140305 0821 4207.5 003669997 USA COMMSTA Miami
20140306 2329 4207.5 003669998 USA COMMSTA New Orleans
20140305 1854 4207.5 004122100 CHN Shanghai Radio
20140425 2121 4207.5 005030001 AUS Charleville / Wiluna Radio
20140310 2331 4207.5 005671000 THA Bangkok Radio
20140320 0234 4207.5 006221111 EGY Alexandria Radio
20140313 2204 4207.5 237673000 GRC Piraeus Joint JRCC

6312.0 :
20140331 1648 6312.0 002059981 BEL MRCC Oostende
20140304 2027 6312.0 002371000 GRC Olympia Radio
20140304 1517 6312.0 002711000 TUR Istanbul Radio
20140416 0858 6312.0 002733700 RUS Saint Petersburg Radio
20140308 0036 6312.0 003660093 USA Houston Radio
20140419 0726 6312.0 003669990 USA CAMSPAC Pt Reyes
20140304 2231 6312.0 003669991 USA COMMSTA Boston
20140312 0631 6312.0 003669993 HWA CAMSPAC Honolulu
20140305 0304 6312.0 003669995 USA COMMSTA Portsmouth
20140305 0619 6312.0 003669997 USA COMMSTA Miami
20140309 0530 6312.0 003669998 USA COMMSTA New Orleans
20140308 2059 6312.0 004122100 CHN Shanghai Radio
20140309 1551 6312.0 004310001 JPN Tokyo Coast Guard Radio
20140306 1830 6312.0 005030001 AUS Charleville / Wiluna Radio
20140329 1704 6312.0 005250008 INS Semarang Radio
20140309 1854 6312.0 005671000 THA Bangkok Radio
20140309 1735 6312.0 005741040 VTN Hai Phong Radio
20140314 1616 6312.0 005743030 VTN Ho Chi Minh Ville Radio
20140316 1819 6312.0 006010001 AFS Cape Town Radio
20140308 0049 6312.0 006221111 EGY Alexandria Radio
20140315 0523 6312.0 007100002 BRA Recife Radio

8414.5 :
20140622 2107 8414.5 002130100 GEO Batumi Radio
20140304 1236 8414.5 002241022 ESP Coruna Radio
20140326 1050 8414.5 002241026 CNR Las Palmas Radio
20140910 1510 8414.5 002279114 FRA TEST ANFR SR DONGES
20140305 1011 8414.5 002371000 GRC Olympia Radio
20140614 1009 8414.5 002510100 ISL Reykjavik Radio
20140324 0529 8414.5 002640570 ROU Constanta Radio
20140304 1504 8414.5 002711000 TUR Istanbul Radio
20140322 1340 8414.5 002750100 LVA Riga rescue Radio
20140618 0406 8414.5 003160023 CAN Iqaluit Radio
20140305 0148 8414.5 003660003 USA Mobile Radio WLO
20140305 0536 8414.5 003669899 ALS Kodiak Radio
20140307 0920 8414.5 003669990 USA CAMSPAC Pt Reyes
20140304 2006 8414.5 003669991 USA COMMSTA Boston
20140307 1007 8414.5 003669993 HWA CAMSPAC Honolulu
20140304 1959 8414.5 003669995 USA COMMSTA Portsmouth
20140305 0104 8414.5 003669997 USA COMMSTA Miami
20140304 1952 8414.5 003669998 USA COMMSTA New Orleans
20140305 0007 8414.5 003669999 USA USCG Group Call
20140306 1429 8414.5 004122100 CHN Shanghai Radio
20140415 0301 8414.5 004225100 IRN Bandar-e Emam Khomeyni
20140427 1520 8414.5 004225202 IRN Asaluyeh
20140619 1712 8414.5 004225600 IRN Now Shahr
20140409 1411 8414.5 004231000 AZE Baku Radio
20140309 1551 8414.5 004310001 JPN Tokyo Coast Guard Radio
20140308 1608 8414.5 004661010 QAT Doha Radio
20140427 1951 8414.5 004773500 CHN Hong Kong Marine Rescue
20140307 1536 8414.5 005030001 AUS Charleville / Wiluna Radio
20140509 1944 8414.5 005120010 NZL Taupo Radio
20140408 1859 8414.5 005250008 INS Semarang Radio
20140412 1954 8414.5 005671000 THA Bangkok Radio
20140307 1527 8414.5 005741040 VTN Hai Phong Radio
20140321 2033 8414.5 005742030 VTN Da Nang Radio
20140304 2004 8414.5 005742080 VTN Nha Trang Radio
20140419 2244 8414.5 005743020 VTN Vung Tau Radio
20140324 1502 8414.5 005743030 VTN Ho Chi Minh Ville Radio
20140326 0439 8414.5 006010001 AFS Cape Town Radio
20140313 0012 8414.5 006221111 EGY Alexandria Radio
20140305 0024 8414.5 006452700 MAU Mauritius Radio
20140322 0542 8414.5 007100001 BRA Rio de Janeiro Radio
20140305 0448 8414.5 007100002 BRA Recife Radio
20140415 2354 8414.5 007250380 CHL Punta Arenas
20140531 2343 8414.5 007251860 CHL Valparaiso Radio
20140423 0713 8414.5 007600125 PRU Callao Radio
20140323 0659 8414.5 007600129 PRU Mollendo Radio
20140311 1543 8414.5 237673000 GRC Piraeus Joint JRCC

12577.0 :
20140520 1010 12577.0 002240991 ESP Barcelona
20140304 2317 12577.0 002241022 ESP Coruna Radio
20140321 1148 12577.0 002241026 CNR Las Palmas Radio
20140801 1019 12577.0 002279114 FRA TEST ANFR SR DONGES
20140322 1042 12577.0 002371000 GRC Olympia Radio
20140925 1039 12577.0 002387010 HRV Rijeka Radio
20140828 0658 12577.0 002391000 GRC Aspropirgos Radio (Hellenic CG
20140322 2004 12577.0 002510100 ISL Reykjavik Radio
20140304 1259 12577.0 002711000 TUR Istanbul Radio
20140830 1009 12577.0 002733717 RSE MRCC Dikson
20140830 0804 12577.0 002733718 RSE MRSC Tiksi
20140627 1218 12577.0 003160023 CAN Iqaluit Radio
20140305 1009 12577.0 003660003 USA Mobile Radio WLO
20140320 1957 12577.0 003669899 ALS Kodiak Radio
20140305 1331 12577.0 003669990 USA CAMSPAC Pt Reyes
20140304 1415 12577.0 003669991 USA COMMSTA Boston
20140305 0321 12577.0 003669993 HWA CAMSPAC Honolulu
20140304 1257 12577.0 003669995 USA COMMSTA Portsmouth
20140304 1906 12577.0 003669997 USA COMMSTA Miami
20140304 1731 12577.0 003669998 USA COMMSTA New Orleans
20140310 1419 12577.0 003669999 USA USCG Group Call
20140731 1930 12577.0 004121100 CHN Tianjin Radio
20140305 0009 12577.0 004122100 CHN Shanghai Radio
20140419 0453 12577.0 004225100 IRN Bandar-e Emam Khomeyni
20140426 1243 12577.0 004225202 IRN Asaluyeh
20140701 1817 12577.0 004225600 IRN Now Shahr
20140428 0655 12577.0 004225601 IRN Amir Abad Radio
20140308 0826 12577.0 004231000 AZE Baku Radio
20140309 1251 12577.0 004310001 JPN Tokyo Coast Guard Radio
20140321 2025 12577.0 004773500 CHN Hong Kong Marine Rescue
20140304 1346 12577.0 005030001 AUS Charleville / Wiluna Radio
20140519 0406 12577.0 005038819 AUS SEAMEC EG TAFE Base station VI
20140307 1235 12577.0 005120010 NZL Taupo Radio
20140411 1347 12577.0 005250007 INS Jayapura Radio
20140305 1720 12577.0 005741040 VTN Hai Phong Radio
20140306 1451 12577.0 005743030 VTN Ho Chi Minh Ville Radio
20140304 1952 12577.0 006010001 AFS Cape Town Radio
20140305 0801 12577.0 006221111 EGY Alexandria Radio
20140304 2004 12577.0 006452700 MAU Mauritius Radio
20140423 1640 12577.0 007010008 ARG Comodoro Rivadavia
20140405 0554 12577.0 007100001 BRA Rio de Janeiro Radio
20140308 0503 12577.0 007100002 BRA Recife Radio
20140422 1434 12577.0 007251860 CHL Valparaiso Radio
20140323 0956 12577.0 237673000 GRC Piraeus Joint JRCC

16804.5 :
20140311 2029 16804.5 002371000 GRC Olympia Radio
20140528 0948 16804.5 002391000 GRC Aspropirgos Radio (Hellenic CG
20140304 1258 16804.5 002711000 TUR Istanbul Radio
20140519 0750 16804.5 002760100 EST Tallinn Radio
20140627 0407 16804.5 003160023 CAN Iqaluit Radio
20140327 0745 16804.5 003669899 ALS Kodiak Radio
20140321 0754 16804.5 003669990 USA CAMSPAC Pt Reyes
20140304 1407 16804.5 003669991 USA COMMSTA Boston
20140312 1622 16804.5 003669993 HWA CAMSPAC Honolulu
20140304 1321 16804.5 003669995 USA COMMSTA Portsmouth
20140305 1222 16804.5 003669997 USA COMMSTA Miami
20140304 1325 16804.5 003669998 USA COMMSTA New Orleans
20140304 1608 16804.5 003669999 USA USCG Group Call
20140305 0045 16804.5 004122100 CHN Shanghai Radio
20140411 0118 16804.5 004194401 IND Chennai
20140511 0530 16804.5 004225100 IRN Bandar-e Emam Khomeyni
20140428 0832 16804.5 004225202 IRN Asaluyeh
20140705 1418 16804.5 004225600 IRN Now Shahr
20140426 1247 16804.5 004225601 IRN Amir Abad Radio
20140304 1513 16804.5 004310001 JPN Tokyo Coast Guard Radio
20140410 1954 16804.5 004773500 CHN Hong Kong Marine Rescue
20140304 1435 16804.5 005030001 AUS Charleville / Wiluna Radio
20140315 0830 16804.5 005120010 NZL Taupo Radio
20140304 2001 16804.5 005741040 VTN Hai Phong Radio
20140323 1458 16804.5 005743030 VTN Ho Chi Minh Ville Radio
20140309 1754 16804.5 006010001 AFS Cape Town Radio
20140304 1310 16804.5 006221111 EGY Alexandria Radio
20140318 0911 16804.5 006221120 EGY Ismailia Radio
20140412 1349 16804.5 006452700 MAU Mauritius Radio
20140404 2020 16804.5 007100001 BRA Rio de Janeiro Radio
20140305 1934 16804.5 007100002 BRA Recife Radio
20140503 2300 16804.5 007251860 CHL Valparaiso Radio
20140322 1449 16804.5 237673000 GRC Piraeus Joint JRCC



A list compiled from all the people who feed their YaDD received messages into the database  :

Total 2177.0kHz : 11
Total 2187.5kHz : 105
Total 4207.5kHz : 24
Total 6312.0kHz : 27
Total 8414.5kHz : 54
Total 12577.0kHz : 48
Total 16804.5kHz : 38

2177.0 :
[YaDDNet] 20140315 1855 2177.0 002050480 BEL Ostende Radio 
[YaDDNet] 20140315 1814 2177.0 002191000 DNK Lyngby Radio 
[YaDDNet] 20140318 1241 2177.0 002311000 FRO Torshavn Radio 
[YaDDNet] 20140316 1701 2177.0 002371000 GRC Olympia Radio 
[YaDDNet] 20140316 2239 2177.0 002510100 ISL Reykjavik Radio 
[YaDDNet] 20140317 1108 2177.0 002570000 NOR Public Correspondence 
[YaDDNet] 20140317 0625 2177.0 002570100 NOR Tjome Radio 
[YaDDNet] 20140315 2351 2177.0 002570300 NOR Rogaland Radio 
[YaDDNet] 20140316 0715 2177.0 002570500 NOR Floroe Radio 
[YaDDNet] 20140318 0732 2177.0 002570700 NOR Bodoe Radio 
[YaDDNet] 20140317 1332 2177.0 002570800 NOR Vardo Radio 

2187.5 :
[YaDDNet] 20140304 1358 2187.5 002050480 BEL Ostende Radio
[YaDDNet] 20140304 1541 2187.5 002059981 BEL MRCC Oostende
[YaDDNet] 20140304 1806 2187.5 002070810 BUL Varna Radio
[YaDDNet] 20140312 2345 2187.5 002070811 BUL Burgas Radio
[YaDDNet] 20140304 2244 2187.5 002091000 CYP Cyprus Radio
[YaDDNet] 20140304 1337 2187.5 002111240 DEU Bremen Radio
[YaDDNet] 20140304 1203 2187.5 002191000 DNK Lyngby Radio
[YaDDNet] 20140517 2212 2187.5 002240991 ESP Barcelona
[YaDDNet] 20140305 0705 2187.5 002240993 ESP Finisterre MRCC
[YaDDNet] 20140305 0035 2187.5 002240994 ESP Tarifa MRCC
[YaDDNet] 20140426 0749 2187.5 002240996 ESP MRCC Bilbao
[YaDDNet] 20140306 0746 2187.5 002241002 ESP Almeria Radio
[YaDDNet] 20140306 0249 2187.5 002241007 CNR MRCC Tenerife Radio
[YaDDNet] 20140304 1302 2187.5 002241022 ESP Coruna Radio
[YaDDNet] 20140304 1905 2187.5 002241024 ESP Valencia Radio
[YaDDNet] 20140304 1914 2187.5 002241026 CNR Las Palmas Radio
[YaDDNet] 20140305 0101 2187.5 002275000 FRA CROSS Etel
[YaDDNet] 20140305 1552 2187.5 002275100 FRA CROSS Gris Nez
[YaDDNet] 20140305 0100 2187.5 002275200 FRA CROSS Jobourg
[YaDDNet] 20140304 1524 2187.5 002275300 FRA CROSS Corsen
[YaDDNet] 20140305 0230 2187.5 002275400 FRA CROSS La Garde
[YaDDNet] 20140503 0500 2187.5 002275420 COR Aspretto
[YaDDNet] 20140916 0633 2187.5 002279114 FRA TEST ANFR SR DONGES
[YaDDNet] 20140304 1428 2187.5 002301000 FIN Mariehamn Radio
[YaDDNet] 20140308 0201 2187.5 002302000 FIN Helsinki Radio
[YaDDNet] 20140308 1053 2187.5 002303000 FIN Raippaluoto Radio (Vaasa)
[YaDDNet] 20140305 0515 2187.5 002311000 FRO Torshavn Radio
[YaDDNet] 20140304 1207 2187.5 002320001 SHE Shetland Coastguard
[YaDDNet] 20140304 1253 2187.5 002320004 SCT Aberdeen Coastguard
[YaDDNet] 20140304 1253 2187.5 002320007 ENG Humber Coastguard
[YaDDNet] 20140304 1301 2187.5 002320009 ENG Thames Coastguard
[YaDDNet] 20140304 1446 2187.5 002320013 ENG Brixham Coastguard
[YaDDNet] 20140304 1442 2187.5 002320014 ENG Falmouth Coastguard
[YaDDNet] 20140311 2333 2187.5 002320016 WLS Swansea Coastguard
[YaDDNet] 20140304 1403 2187.5 002320017 WLS Milford Haven Coastguard
[YaDDNet] 20140304 1358 2187.5 002320021 NIR Belfast Coastguard
[YaDDNet] 20140323 1513 2187.5 002320022 SCT Clyde Coastguard
[YaDDNet] 20140304 1744 2187.5 002320024 SCT Stornoway Coastguard
[YaDDNet] 20140314 1641 2187.5 002320204 ENG Snargate Radio Dover
[YaDDNet] 20140304 1731 2187.5 002371000 GRC Olympia Radio
[YaDDNet] 20140308 2355 2187.5 002387010 HRV Rijeka Radio
[YaDDNet] 20140330 2333 2187.5 002392000 GRC Piraeus Radio
[YaDDNet] 20140304 1217 2187.5 002442000 HOL Netherlands CG Radio
[YaDDNet] 20140305 0018 2187.5 002470001 ITA Roma Radio
[YaDDNet] 20140304 1713 2187.5 002470002 SCY Palermo Radio
[YaDDNet] 20140305 0759 2187.5 002500100 IRL Malin Head Radio
[YaDDNet] 20140304 1402 2187.5 002500200 IRL Valentia Radio
[YaDDNet] 20140410 1832 2187.5 002500300 IRL Dublin Radio
[YaDDNet] 20140304 1310 2187.5 002510100 ISL Reykjavik Radio
[YaDDNet] 20140305 2007 2187.5 002570000 NOR Public Correspondence
[YaDDNet] 20140305 0723 2187.5 002570100 NOR Tjome Radio
[YaDDNet] 20140326 0752 2187.5 002570200 NOR Farsund Radio
[YaDDNet] 20140304 1205 2187.5 002570300 NOR Rogaland Radio
[YaDDNet] 20140311 0645 2187.5 002570400 NOR Bergen Radio
[YaDDNet] 20140304 1204 2187.5 002570500 NOR Floroe Radio
[YaDDNet] 20140305 0327 2187.5 002570700 NOR Bodoe Radio
[YaDDNet] 20140305 0713 2187.5 002570800 NOR Vardo Radio
[YaDDNet] 20140415 0550 2187.5 002573550 NOR Vardo VTS
[YaDDNet] 20140304 1217 2187.5 002610210 POL Witowo Radio
[YaDDNet] 20140316 1644 2187.5 002620001 MNE Bar Radio
[YaDDNet] 20140306 0503 2187.5 002640570 ROU Constanta Radio
[YaDDNet] 20140304 1300 2187.5 002652000 SWE Stockholm Radio
[YaDDNet] 20140304 1159 2187.5 002653000 SWE Goteborg Radio
[YaDDNet] 20140527 2220 2187.5 002653500 SWE Stockholm Radio
[YaDDNet] 20140304 1641 2187.5 002711000 TUR Istanbul Radio
[YaDDNet] 20140305 1542 2187.5 002712000 TUR Samsun Radio
[YaDDNet] 20140307 0602 2187.5 002713000 TUR Antalya Radio
[YaDDNet] 20140305 0609 2187.5 002715000 TUR Izmir Radio
[YaDDNet] 20140307 0221 2187.5 002723660 UKR Odessa Radio
[YaDDNet] 20140304 2123 2187.5 002733700 RUS Saint Petersburg Radio
[YaDDNet] 20140322 1058 2187.5 002733733 RSE Yuzno Sakhalinsk Radio
[YaDDNet] 20140304 1603 2187.5 002734411 RUS Novorossiysk Radio
[YaDDNet] 20140322 1254 2187.5 002734412 RSE Vladivostok Radio
[YaDDNet] 20140304 1456 2187.5 002734414 RUS Arkhangelsk Radio
[YaDDNet] 20140305 0616 2187.5 002734417 KAL Kaliningrad Radio
[YaDDNet] 20140304 1755 2187.5 002734419 RUS Astrakhan Radio
[YaDDNet] 20140310 0456 2187.5 002734420 RUS Murmansk Radio
[YaDDNet] 20140311 1629 2187.5 002734423 RUS Makhachkala Radio
[YaDDNet] 20140304 1604 2187.5 002734446 RUS Taman Radio
[YaDDNet] 20140305 1603 2187.5 002734487 RUS Taganrog Radio
[YaDDNet] 20140305 1447 2187.5 002750100 LVA Riga rescue Radio
[YaDDNet] 20140913 2207 2187.5 002761000 EST Tallinn MRCC
[YaDDNet] 20140305 0836 2187.5 002770330 LTU Klaipeda Rescue Centre
[YaDDNet] 20140305 0441 2187.5 003061000 ATN Curacao Radio
[YaDDNet] 20140307 0547 2187.5 003100001 BER Bermuda Harbour Radio
[YaDDNet] 20140305 0442 2187.5 003313000 GRL Aasiaat Radio
[YaDDNet] 20140916 1130 2187.5 003669899 ALS Kodiak Radio
[YaDDNet] 20140316 0937 2187.5 003669990 USA CAMSPAC Pt Reyes
[YaDDNet] 20140307 0032 2187.5 003669991 USA COMMSTA Boston
[YaDDNet] 20140404 0955 2187.5 003669993 HWA CAMSPAC Honolulu
[YaDDNet] 20140305 0649 2187.5 003669995 USA COMMSTA Portsmouth
[YaDDNet] 20140306 0727 2187.5 003669997 USA COMMSTA Miami
[YaDDNet] 20140310 0552 2187.5 003669998 USA COMMSTA New Orleans
[YaDDNet] 20140307 1949 2187.5 004122100 CHN Shanghai Radio
[YaDDNet] 20140310 1717 2187.5 004122200 CHN Qingdao Radio
[YaDDNet] 20140305 1753 2187.5 004123100 CHN Guangzhou Radio
[YaDDNet] 20140413 0134 2187.5 004194401 IND Chennai
[YaDDNet] 20140403 2004 2187.5 004231000 AZE Baku Radio
[YaDDNet] 20140306 1653 2187.5 004280001 ISR Haifa Radio
[YaDDNet] 20140306 1746 2187.5 004661010 QAT Doha Radio
[YaDDNet] 20140305 1745 2187.5 005671000 THA Bangkok Radio
[YaDDNet] 20140311 2104 2187.5 005741040 VTN Hai Phong Radio
[YaDDNet] 20140305 0730 2187.5 006052110 ALG Alger Radio
[YaDDNet] 20140315 2234 2187.5 006221111 EGY Alexandria Radio
[YaDDNet] 20140304 1737 2187.5 006221112 EGY Kosseir Radio

4207.5 :
[YaDDNet] 20140304 1807 4207.5 002070810 BUL Varna Radio
[YaDDNet] 20140314 1632 4207.5 002091000 CYP Cyprus Radio
[YaDDNet] 20140820 0539 4207.5 002130100 GEO Batumi Radio
[YaDDNet] 20140327 0635 4207.5 002241022 ESP Coruna Radio
[YaDDNet] 20140312 1602 4207.5 002320204 ENG Snargate Radio Dover
[YaDDNet] 20140306 0017 4207.5 002371000 GRC Olympia Radio
[YaDDNet] 20140917 2348 4207.5 002392000 GRC Piraeus Radio
[YaDDNet] 20140830 0034 4207.5 002640570 ROU Constanta Radio
[YaDDNet] 20140304 1827 4207.5 002711000 TUR Istanbul Radio
[YaDDNet] 20140828 0248 4207.5 002733700 RUS Saint Petersburg Radio
[YaDDNet] 20140320 1011 4207.5 003669899 ALS Kodiak Radio
[YaDDNet] 20140320 0529 4207.5 003669990 USA CAMSPAC Pt Reyes
[YaDDNet] 20140307 0847 4207.5 003669991 USA COMMSTA Boston
[YaDDNet] 20140320 1440 4207.5 003669993 HWA CAMSPAC Honolulu
[YaDDNet] 20140304 2254 4207.5 003669995 USA COMMSTA Portsmouth
[YaDDNet] 20140305 0821 4207.5 003669997 USA COMMSTA Miami
[YaDDNet] 20140306 2329 4207.5 003669998 USA COMMSTA New Orleans
[YaDDNet] 20140402 0549 4207.5 003669999 USA USCG Group Call
[YaDDNet] 20140305 1854 4207.5 004122100 CHN Shanghai Radio
[YaDDNet] 20140329 1441 4207.5 005030001 AUS Charleville / Wiluna Radio
[YaDDNet] 20140310 2331 4207.5 005671000 THA Bangkok Radio
[YaDDNet] 20140320 0234 4207.5 006221111 EGY Alexandria Radio
[YaDDNet] 20140504 1037 4207.5 007251860 CHL Valparaiso Radio
[YaDDNet] 20140313 2204 4207.5 237673000 GRC Piraeus Joint JRCC

6312.0 :
[YaDDNet] 20140331 1648 6312.0 002059981 BEL MRCC Oostende
[YaDDNet] 20140402 0050 6312.0 002241022 ESP Coruna Radio
[YaDDNet] 20140304 2027 6312.0 002371000 GRC Olympia Radio
[YaDDNet] 20140304 1517 6312.0 002711000 TUR Istanbul Radio
[YaDDNet] 20140416 0858 6312.0 002733700 RUS Saint Petersburg Radio
[YaDDNet] 20140308 0036 6312.0 003660093 USA Houston Radio
[YaDDNet] 20140727 0947 6312.0 003669899 ALS Kodiak Radio
[YaDDNet] 20140419 0726 6312.0 003669990 USA CAMSPAC Pt Reyes
[YaDDNet] 20140304 2231 6312.0 003669991 USA COMMSTA Boston
[YaDDNet] 20140312 0631 6312.0 003669993 HWA CAMSPAC Honolulu
[YaDDNet] 20140305 0304 6312.0 003669995 USA COMMSTA Portsmouth
[YaDDNet] 20140305 0619 6312.0 003669997 USA COMMSTA Miami
[YaDDNet] 20140309 0530 6312.0 003669998 USA COMMSTA New Orleans
[YaDDNet] 20140317 0707 6312.0 003669999 USA USCG Group Call
[YaDDNet] 20140308 2059 6312.0 004122100 CHN Shanghai Radio
[YaDDNet] 20140309 1551 6312.0 004310001 JPN Tokyo Coast Guard Radio
[YaDDNet] 20140306 1830 6312.0 005030001 AUS Charleville / Wiluna Radio
[YaDDNet] 20140418 1201 6312.0 005120010 NZL Taupo Radio
[YaDDNet] 20140329 1704 6312.0 005250008 INS Semarang Radio
[YaDDNet] 20140309 1854 6312.0 005671000 THA Bangkok Radio
[YaDDNet] 20140309 1735 6312.0 005741040 VTN Hai Phong Radio
[YaDDNet] 20140314 1616 6312.0 005743030 VTN Ho Chi Minh Ville Radio
[YaDDNet] 20140316 1819 6312.0 006010001 AFS Cape Town Radio
[YaDDNet] 20140308 0049 6312.0 006221111 EGY Alexandria Radio
[YaDDNet] 20140407 2337 6312.0 006452700 MAU Mauritius Radio
[YaDDNet] 20140315 0523 6312.0 007100002 BRA Recife Radio
[YaDDNet] 20140622 0243 6312.0 237673000 GRC Piraeus Joint JRCC

8414.5 :
[YaDDNet] 20140622 2107 8414.5 002130100 GEO Batumi Radio
[YaDDNet] 20140304 1236 8414.5 002241022 ESP Coruna Radio
[YaDDNet] 20140321 1146 8414.5 002241026 CNR Las Palmas Radio
[YaDDNet] 20140724 0944 8414.5 002279114 FRA TEST ANFR SR DONGES
[YaDDNet] 20140728 0736 8414.5 002320204 ENG Snargate Radio Dover
[YaDDNet] 20140305 1011 8414.5 002371000 GRC Olympia Radio
[YaDDNet] 20140827 1417 8414.5 002387010 HRV Rijeka Radio
[YaDDNet] 20140614 1009 8414.5 002510100 ISL Reykjavik Radio
[YaDDNet] 20140324 0529 8414.5 002640570 ROU Constanta Radio
[YaDDNet] 20140304 1504 8414.5 002711000 TUR Istanbul Radio
[YaDDNet] 20140322 1340 8414.5 002750100 LVA Riga rescue Radio
[YaDDNet] 20140618 0406 8414.5 003160023 CAN Iqaluit Radio
[YaDDNet] 20140305 0148 8414.5 003660003 USA Mobile Radio WLO
[YaDDNet] 20140305 0536 8414.5 003669899 ALS Kodiak Radio
[YaDDNet] 20140307 0920 8414.5 003669990 USA CAMSPAC Pt Reyes
[YaDDNet] 20140304 2006 8414.5 003669991 USA COMMSTA Boston
[YaDDNet] 20140307 1007 8414.5 003669993 HWA CAMSPAC Honolulu
[YaDDNet] 20140304 1959 8414.5 003669995 USA COMMSTA Portsmouth
[YaDDNet] 20140305 0104 8414.5 003669997 USA COMMSTA Miami
[YaDDNet] 20140304 1952 8414.5 003669998 USA COMMSTA New Orleans
[YaDDNet] 20140305 0007 8414.5 003669999 USA USCG Group Call
[YaDDNet] 20140306 1429 8414.5 004122100 CHN Shanghai Radio
[YaDDNet] 20140921 0652 8414.5 004194401 IND Chennai
[YaDDNet] 20140415 0301 8414.5 004225100 IRN Bandar-e Emam Khomeyni
[YaDDNet] 20140427 1520 8414.5 004225202 IRN Asaluyeh
[YaDDNet] 20140921 0346 8414.5 004225500 IRN Anzali Radio
[YaDDNet] 20140619 1712 8414.5 004225600 IRN Now Shahr
[YaDDNet] 20140409 1411 8414.5 004231000 AZE Baku Radio
[YaDDNet] 20140309 1551 8414.5 004310001 JPN Tokyo Coast Guard Radio
[YaDDNet] 20140329 1004 8414.5 004401001 KOR Incheon Coast Guard Radio
[YaDDNet] 20140328 0803 8414.5 004401004 KOR Pusan Coast Guard Radio
[YaDDNet] 20140502 2026 8414.5 004401005 KOR Cheju
[YaDDNet] 20140308 1608 8414.5 004661010 QAT Doha Radio
[YaDDNet] 20140427 1951 8414.5 004773500 CHN Hong Kong Marine Rescue
[YaDDNet] 20140307 1536 8414.5 005030001 AUS Charleville / Wiluna Radio
[YaDDNet] 20140328 1102 8414.5 005120010 NZL Taupo Radio
[YaDDNet] 20140729 1729 8414.5 005250006 INS Amboina Radio
[YaDDNet] 20140408 1859 8414.5 005250008 INS Semarang Radio
[YaDDNet] 20140412 1954 8414.5 005671000 THA Bangkok Radio
[YaDDNet] 20140307 1527 8414.5 005741040 VTN Hai Phong Radio
[YaDDNet] 20140321 2033 8414.5 005742030 VTN Da Nang Radio
[YaDDNet] 20140304 2004 8414.5 005742080 VTN Nha Trang Radio
[YaDDNet] 20140419 2244 8414.5 005743020 VTN Vung Tau Radio
[YaDDNet] 20140322 1107 8414.5 005743030 VTN Ho Chi Minh Ville Radio
[YaDDNet] 20140316 0216 8414.5 006010001 AFS Cape Town Radio
[YaDDNet] 20140313 0012 8414.5 006221111 EGY Alexandria Radio
[YaDDNet] 20140305 0024 8414.5 006452700 MAU Mauritius Radio
[YaDDNet] 20140313 0646 8414.5 007100001 BRA Rio de Janeiro Radio
[YaDDNet] 20140305 0448 8414.5 007100002 BRA Recife Radio
[YaDDNet] 20140405 0258 8414.5 007250380 CHL Punta Arenas
[YaDDNet] 20140319 0337 8414.5 007251860 CHL Valparaiso Radio
[YaDDNet] 20140423 0713 8414.5 007600125 PRU Callao Radio
[YaDDNet] 20140323 0659 8414.5 007600129 PRU Mollendo Radio
[YaDDNet] 20140311 1543 8414.5 237673000 GRC Piraeus Joint JRCC

12577.0 :
[YaDDNet] 20140520 1010 12577.0 002240991 ESP Barcelona
[YaDDNet] 20140304 2317 12577.0 002241022 ESP Coruna Radio
[YaDDNet] 20140318 2002 12577.0 002241024 ESP Valencia Radio
[YaDDNet] 20140321 1135 12577.0 002241026 CNR Las Palmas Radio
[YaDDNet] 20140725 0827 12577.0 002279114 FRA TEST ANFR SR DONGES
[YaDDNet] 20140322 1042 12577.0 002371000 GRC Olympia Radio
[YaDDNet] 20140925 1039 12577.0 002387010 HRV Rijeka Radio
[YaDDNet] 20140423 0902 12577.0 002391000 GRC Aspropirgos Radio (Hellenic CG
[YaDDNet] 20140322 2004 12577.0 002510100 ISL Reykjavik Radio
[YaDDNet] 20140511 1449 12577.0 002653000 SWE Goteborg Radio
[YaDDNet] 20140304 1259 12577.0 002711000 TUR Istanbul Radio
[YaDDNet] 20140830 1009 12577.0 002733717 RSE MRCC Dikson
[YaDDNet] 20140830 0804 12577.0 002733718 RSE MRSC Tiksi
[YaDDNet] 20140626 0541 12577.0 003160023 CAN Iqaluit Radio
[YaDDNet] 20140305 1009 12577.0 003660003 USA Mobile Radio WLO
[YaDDNet] 20140320 1957 12577.0 003669899 ALS Kodiak Radio
[YaDDNet] 20140305 1331 12577.0 003669990 USA CAMSPAC Pt Reyes
[YaDDNet] 20140304 1415 12577.0 003669991 USA COMMSTA Boston
[YaDDNet] 20140305 0321 12577.0 003669993 HWA CAMSPAC Honolulu
[YaDDNet] 20140304 1257 12577.0 003669995 USA COMMSTA Portsmouth
[YaDDNet] 20140304 1906 12577.0 003669997 USA COMMSTA Miami
[YaDDNet] 20140304 1731 12577.0 003669998 USA COMMSTA New Orleans
[YaDDNet] 20140310 1419 12577.0 003669999 USA USCG Group Call
[YaDDNet] 20140731 1930 12577.0 004121100 CHN Tianjin Radio
[YaDDNet] 20140305 0009 12577.0 004122100 CHN Shanghai Radio
[YaDDNet] 20140820 0514 12577.0 004194401 IND Chennai
[YaDDNet] 20140419 0453 12577.0 004225100 IRN Bandar-e Emam Khomeyni
[YaDDNet] 20140426 1243 12577.0 004225202 IRN Asaluyeh
[YaDDNet] 20140616 1716 12577.0 004225600 IRN Now Shahr
[YaDDNet] 20140428 0655 12577.0 004225601 IRN Amir Abad Radio
[YaDDNet] 20140308 0826 12577.0 004231000 AZE Baku Radio
[YaDDNet] 20140309 1251 12577.0 004310001 JPN Tokyo Coast Guard Radio
[YaDDNet] 20140321 2025 12577.0 004773500 CHN Hong Kong Marine Rescue
[YaDDNet] 20140304 1346 12577.0 005030001 AUS Charleville / Wiluna Radio
[YaDDNet] 20140519 0406 12577.0 005038819 AUS SEAMEC EG TAFE Base station VI
[YaDDNet] 20140307 1235 12577.0 005120010 NZL Taupo Radio
[YaDDNet] 20140411 1347 12577.0 005250007 INS Jayapura Radio
[YaDDNet] 20140305 1720 12577.0 005741040 VTN Hai Phong Radio
[YaDDNet] 20140306 1451 12577.0 005743030 VTN Ho Chi Minh Ville Radio
[YaDDNet] 20140304 1952 12577.0 006010001 AFS Cape Town Radio
[YaDDNet] 20140305 0801 12577.0 006221111 EGY Alexandria Radio
[YaDDNet] 20140304 2004 12577.0 006452700 MAU Mauritius Radio
[YaDDNet] 20140823 1152 12577.0 007010003 ARG Mar del Plata
[YaDDNet] 20140423 1640 12577.0 007010008 ARG Comodoro Rivadavia
[YaDDNet] 20140314 2011 12577.0 007100001 BRA Rio de Janeiro Radio
[YaDDNet] 20140308 0503 12577.0 007100002 BRA Recife Radio
[YaDDNet] 20140401 0607 12577.0 007251860 CHL Valparaiso Radio
[YaDDNet] 20140323 0956 12577.0 237673000 GRC Piraeus Joint JRCC

16804.5 :
[YaDDNet] 20140421 1240 16804.5 002241022 ESP Coruna Radio
[YaDDNet] 20140311 2029 16804.5 002371000 GRC Olympia Radio
[YaDDNet] 20140527 1115 16804.5 002391000 GRC Aspropirgos Radio (Hellenic CG
[YaDDNet] 20140807 1240 16804.5 002640570 ROU Constanta Radio
[YaDDNet] 20140304 1258 16804.5 002711000 TUR Istanbul Radio
[YaDDNet] 20140709 2109 16804.5 002713000 TUR Antalya Radio
[YaDDNet] 20140519 0750 16804.5 002760100 EST Tallinn Radio
[YaDDNet] 20140627 0407 16804.5 003160023 CAN Iqaluit Radio
[YaDDNet] 20140321 2015 16804.5 003669899 ALS Kodiak Radio
[YaDDNet] 20140316 1855 16804.5 003669990 USA CAMSPAC Pt Reyes
[YaDDNet] 20140304 1407 16804.5 003669991 USA COMMSTA Boston
[YaDDNet] 20140312 1513 16804.5 003669993 HWA CAMSPAC Honolulu
[YaDDNet] 20140304 1321 16804.5 003669995 USA COMMSTA Portsmouth
[YaDDNet] 20140305 1222 16804.5 003669997 USA COMMSTA Miami
[YaDDNet] 20140304 1325 16804.5 003669998 USA COMMSTA New Orleans
[YaDDNet] 20140304 1608 16804.5 003669999 USA USCG Group Call
[YaDDNet] 20140305 0045 16804.5 004122100 CHN Shanghai Radio
[YaDDNet] 20140328 1820 16804.5 004194401 IND Chennai
[YaDDNet] 20140511 0530 16804.5 004225100 IRN Bandar-e Emam Khomeyni
[YaDDNet] 20140428 0832 16804.5 004225202 IRN Asaluyeh
[YaDDNet] 20140704 1438 16804.5 004225600 IRN Now Shahr
[YaDDNet] 20140426 1247 16804.5 004225601 IRN Amir Abad Radio
[YaDDNet] 20140914 1215 16804.5 004231000 AZE Baku Radio
[YaDDNet] 20140304 1513 16804.5 004310001 JPN Tokyo Coast Guard Radio
[YaDDNet] 20140312 0947 16804.5 004773500 CHN Hong Kong Marine Rescue
[YaDDNet] 20140304 1435 16804.5 005030001 AUS Charleville / Wiluna Radio
[YaDDNet] 20140315 0830 16804.5 005120010 NZL Taupo Radio
[YaDDNet] 20140904 1404 16804.5 005250028 INS Sibolga Radio
[YaDDNet] 20140304 2001 16804.5 005741040 VTN Hai Phong Radio
[YaDDNet] 20140315 1608 16804.5 005743030 VTN Ho Chi Minh Ville Radio
[YaDDNet] 20140309 1754 16804.5 006010001 AFS Cape Town Radio
[YaDDNet] 20140304 1310 16804.5 006221111 EGY Alexandria Radio
[YaDDNet] 20140318 0911 16804.5 006221120 EGY Ismailia Radio
[YaDDNet] 20140326 1810 16804.5 006452700 MAU Mauritius Radio
[YaDDNet] 20140317 1926 16804.5 007100001 BRA Rio de Janeiro Radio
[YaDDNet] 20140305 1934 16804.5 007100002 BRA Recife Radio
[YaDDNet] 20140320 1408 16804.5 007251860 CHL Valparaiso Radio
[YaDDNet] 20140315 1007 16804.5 237673000 GRC Piraeus Joint JRCC