Dear Brian, LF Group, Many thanks to Brian for the report, glad to see you are getting some positive results from the test signals. I am a little puzzled by the 0.15Hz frequency offset; to get this m
Dear Mike, LF Group, Mine is certainly not the only way of generating a BPSK signal, and it is certainly true from experience that little trouble results from key clicks on 136k, in spite of the fact
Dear LF group, Will run some more WOLF signals tonight at the 30mW ERP level on 137.5000kHz, starting around 2000utc. Also will be running 1W ERP around 0000 onwards. Cheers, Jim Moritz 73 de M0BMU
<?color><?param0100,0100,0100>Dear Mike, LF group,<br><br>I am in the process of putting together some info about my BPSK modulator for the Decca class D PA - it will take a little time to collate al
Dear LF group, Rik's method of producing an accurate audio tone for calibrating the soundcard is very similar to what I am doing, and I can confirm this gives an accurate and unambiguous result. I di
Dear LF Group, Although it may be possible to access the PC's internal clocks one way or another, I can't see it would be much help for timing accuracy - after all, it's all derrived from a very ordi
Dear LF Group, Thanks for the reports and comments. Some pointers to receiving WOLF mode BPSK- The receive audio must be recorded at 8000 samples/sec., mono. DL4YHF's Spectrum Lab can do this, and ge
Dear Wolf, Rik, LF Group, I will try some lower power WOLF BPSK tests tonight, starting about 2000utc. Because different stations are experiencing widely different signal levels, and since with weak
<?color><?param0100,0100,0100>Dear LF Group,<br><br>I arrived at work this morning to find that:<br><br><?color><?param7f00,0000,0000>> Well, WOLF has successfully crossed the pond. Got two lines of
Dear LF group, I transmitted "Wolf" mode signals from 2000 until 0330 utc last night on 137.5kHz. Thanks to DL4YHF for the reception report; I recorded several "random samples" of my signal off-air,
Dear LF Group, Thanks for the interest in the "Wolf" BPSK trials. To make a start, I intend to transmit a test signal this evening, in order to make available a real signal for people to record and e
Dear LF Group, Congratulations to VE1ZJ, VE1ZZ, G3LDO, VA3LK and G3AQC on their awards - Also to G3XDV on finally getting across with his "QRP" signal. For possible further transatlantic QRSS activit
Dear LF Group, Since transatlantic QRSS activity seems to have ceased for the time being, I thought I would give KK7KA's "Wolf" a try. This is essentially BPSK, but the encoding and decoding scheme i
Dear Dick, LF Group, Not much to do with LF I know, but the very interesting book "Metres to Microwaves" by E.B. Callick has a lot of info on British valve development in the WWII period, including m
<?color><?param0100,0100,0100>Dear Andy, LF Group,<br><br>><?/color>The amp is specified as having a 50dBm third order intercept >point and by my reckoning could function as a power amp >delivering o
Dear Bob, LF group Jim, Your statement assumes that the EU band plan can not adapt to demand. 73, Bob ZL2CA Some aspects of band use are not within the power of amateurs to do much adapting to - for
Dear LF Group, Some useful points raised on the subject of Transcontinental modes - here are some responses: The simplest way to improve the capabilities of existing methods is undoubtedly what G3LDO
Dear LF Group, The winter has seen a fair amount of success in the transatlantic tests, and now that the "season" is probably near to an end, it is worth thinking about what the next steps could be,
Dear LF Group, Have not been very active lately due to visiting relatives, but I have been making regular recordings on 137.79kHz in an attempt to receive VA3LK's Wolf-mode beacon sigs. So far, howev
Dear LF Group, G3YXM has kindly posted the modulator circuits and notes on his web site at http://www.wireless.org.uk/moritz.htm Cheers, Jim Moritz 73 de M0BMU
