I am currently looking into a way how to realize a simple way of doing FSK with my DDS VFO. How about "VXO-ing" the clock oscillator? Dave G3YXM. I was thinking the same way. You need 5 Hz out of 13
Hi all, in past weekend I experimented monitoring DCF39's signal with Spectran (the Beta 2c version seems to work well). I receive the sky wave, since the Alps stop the ground wave. The result is tha
In 23.38 30/01/00 , hai scritto: Hello Stewart I can do that if / once the signal has been confirmed as being DCF 73 Andre' Andre - why not post it on a web site? André, please send me the file. I ex
Hi boys, the efficiency of a 1/10 lambda ant over a good ground system could easily be over 50%. Yes, we know. That's the reason for using this antenna ;-) 73 de SM6LKM Well, what is the ... ahem ..
Some thoughts on 136 kHz Ionospheric propagation Sorry for this not being in phase with T/A ideas. ................. On the practicability of talking about "hops" Suggested experiment: Draw a circle
It turned out to be sending the same data as GM3YXM/P but with a mystery delay timing difference of around three seconds. Hello Peter, SPECTRAN takes some time to process the input signal, maybe thre
In 23.21 03/03/00 , hai scritto: Dear all. CFH was quite strong at 2130 gmt then faded almost to nothing by 2155. It is now rising fast at 2215. Much better than usual at this time. Dave G3YXM. At my
Hi Marco, another tip from Jon was that around the operator shift-change time (about 2300z) the mod will usually be killed and the two extreme shift frequencies applied just long enough for the onco
I also noticed DCF39 was off air at about 0100utc last night. It was back on again later. I was starting to think I had an intermittent in the system at one point. Larry, have a small signal generat
Hello all, after the recent messages by Geri and Peter G3LDO about the use of Spectran or Spectrogram for QRS, I did some tests also. I used the following setup: a selective voltmeter with high-imped
Hello all, If you want to try Spectran or Spectrogram at high resolution, I have a beacon running. Frequency is 137.790/792 in DFCW, 40 sec dot lenght, 10 sec spacing. Message is my call plus a lette
In 14.03 19/04/00 , hai scritto: Hi Marco, just after sending the last message at about 0045z I altered the parameters a little on Spectrogram, averaging down to 25, and dropped a 500Hz IF filter ove
In 19.42 20/04/00 , hai scritto: Hello Marco, is your test beacon currently on? I got Spectran Beta 2c running now and would like to give it a try throughout the Easter weekend. Thanks and 73 Geri, D
I will transmit only a carrier at about 10 mW ERP by tonight, for Andy to get a dopplergram of the ionosphere. I will revert to DFCW beacon by tomorrow at 12z. BTW, my QRG is now 137.790 minus 40 mHz
Hello all, my QRSS beacon is on again in DFCW. QRG 137.790/792, ERP is 5 mW, 30s dots, 10s spaces. Please have a look with Spectrogram and Spectran, at maximum resolution. Any report is welcome. 73 -
In 09.39 22/04/00 , Alan G3NYK wrote: ..... An interesting point was that it seemed here as thouh your dot freqquency was about 0.2Hz lower when the DFCW appeared than the last seen steady carrier at
Hi Marco, I checked for the beacon on friday and saturday nigh. I could see some traces but not possible to 'decode' anything. QRN was very bad. 73, Rik ON7YD Rik, with what program and setting? 73,
On this subject, does anyone know of a low-cost source of 455 kHz (series resonance) crystals. I want to make up a ladder filter for the RA1792 with a much narrower bandwidth than the 300 Hz mechani
The notion of excellent transmitter frequency stability is critical, but so also is the necessity of having fully automated receiving systems to take advantage of the fully automated transmitting sys
My QRP DFCW beacon is active again for the weekend. Operating conditions now: Frequency 137.792 / 137.793 kHz, shift about 1.03 Hz Frequency is controlled by the usual "stupid" XTAL in air, so don't
