yesterday I have seen (spectrogram) a RTTY signal at 135.8 kHz... Ham signal ??? No, it is the Greek Navy Fleet Broadcast station at Marathon. Costas +--+ +--+
Hi everybody, as there is discussion in this list about CW ship comms on 500 kHz, you might be interested to see a photo of the 500 kHz antennas on the roof of the Hellenic Coast Guard HQ (callsign S
I am currently changing my service provider.... ...I'd be grateful if you could update your bookmarks... ...accordingly. Hi Steve, I updated the master file with LF links and I shall upload it to my
The Greek RTTY follows a similar pattern, only because it is nearer the daytime signal is rather stronger. Note that this signal becomes strong before dusk, but goes down before our dawn, following
I would guess that the sidebands are due to power supply ripple, and that when FSK modulation is on, all the sidebands get modulated too. Since the data is probably not syncronised with the mains, th
I note the comments on faulty filter capacitors with interest. Not certain of details of the transmitter responsible for the "Growler" on 73.3kHz but if it's a) High powered b) Valved c) Old then it
Not a "whole house" mains filter, but a radio room mains "filter". All main supply to my radio equipment is run via a single phase isolation transformer,... The only problem with this approach is tha
Hi Wolf SXV is on and off at present but it was visible yesterday I believe. I have been told that the mast occupies a site that is going to be developed as an Olympic stadium, so a move could be in
Amongst the mine of nostalgia out there, I there anyone who understands valve circuit topology and can tell us if the circuit I described really can be considered as a cascode but using just a singl
At 29 1004Z May 2001, GBR stopped its MSK transmission and switched to CW mode. It sent briefly a few 1 s dots, its callsign twice "GBR GBR" followed by a few more dots. Then it went off. Nice signal
Fine! GBR transmission received well in Athens, Greece with an S9 signal (and S7-8 ambient noise...). RX: Icom IC-706 + home made converter, ANT: Vertical, 7 meters + 25 meters RG-58/U cable. ATTENTI
Fine! GBR transmission received well in Athens, Greece with an S9 signal (and S7-8 ambient noise...). RX: Icom IC-706 + home made converter, ANT: Vertical, 7 meters + 25 meters RG-58/U cable. Here is
The RMS value is not really appropriate for this purpose Point taken. Whatever you do, be verrry careful about insulating things. Taking into account that both DC terminals fo these power supplies a
Today I received my QSL card from BT Rugby Radio Station for my reception report for the Special Transmission of 29 May on 16 kHz. It is signed by M J Hancock and the address on the card is: BT Rugby
I was also able to successfully receive SAQ with a homebrew electro-mechanical receiver. Nice setup Jim. I am sure you had lots of fun with it! I wish there were a few more regular CW signals at VLF
The morning hours of 1 July there was good propagation on LF and on 18.3 kHz VTX3 (Indian Navy) was very strong at 599 at my location. The SAQ transmissions at 0830 and 0845 were also very well recei
There are news from Greece regarding the 136 kHz band. About a week ago the Helelnic Navy signal on 135.8 kHz disappeared and a new FSK signal (possibly from the same source) appeared on 124.6 kHz. C
