Hello Alberto and Group, I have some ideas for a 'Slow-CW-Viewer' (some of them have been implemented in Spectrum Lab, others in Spectran, others not at all...) How about this : [snip] Wolf and the
I have just uploaded Argo beta 1, a QRSS/DFCW viewer. You can download it from http://www.qsl.net/i2phd/argo Please test it and give your impressions, suggestions, critics, etc. It won't touch in any
How about letting it go slow enough for a 30s dot or a resolution bandwidth of 0.01Hz - as far as I know the only soundcard software that could get anywhere near this and do proper SLOWCW was Spectr
What are the standards for QRSS ? I know of the 3 sec/dot and the 10 sec/dot, but am wondering if something else is used. I'm asking this as I am preparing a QRSS Viewer, with all the settings pre-op
AlbertoMOS-N-FET, V-MOS, DC-DC Converter, 500V, 10A, 200W, equivalent to 2SK694. Regards, Martin Evans GW3UCJ Martin, many thanks. Given their low price, they seem to be the ideal candidates for my
Hi all, I bought at a ham fair last week 4 x SK1029 mosfets, due to their quite low cost. A hand-written piece of paper placed near them stated that they were 500V, > 10A units. I have been unable to
Hi Bill and all, If you have not yet opened today's message from William Staples, don't - it has the VBS.KakWorm virus attached. If you have already opened it and didn't get an error message, you ma
[snip] If the FFT window slides over a transmitted dot the FFT result (for that specific frequency) will increase, reach a maximum when the FTT bin completely overlaps with the dot and then will dec
One promising looking core for the kiloWatt region is the ETD54 and ETD59 sizes in 3C90 available from Farnell. and are specified for use up to 200kHz. What about EHT transformer cores salvaged from
[snip] I have switched off the AGC in Argo. Although this is very efficient, it puts 'holes' in Morse elements when there is noise, instead of displaying the noise itself. In fact, the only was I ca
Hi Alberto - Greetings from Chepstow! Hi Steve, greetings to you from Casirate, a small village in Northern Italy. [snip] So, there you have it. I am still puzzled: If QRSS only needs a 1 Hz bandwid
[snip] I agree. But, if QRSS is such an ideal mode, why do QRSS operators need to use the whole of our tiny 2.1 kHz allocation to do it? [snip] A QRSS signal takes less than 1 Hz of band. Any greate
Alberto, besides the need for a linear PA each of the tones would also have only 50% of the power. Wouldn't that 'give away' 3dB SNR ? 73, Rik ON7YD Rik, true, but then the transmission time would b
[snip] Just as an example of a visual code, 7 frequency levels, using two sucessive symbols per character gives potential for 49 different symbols, enough for letters numbers and a few punctuation.
I noticed what looks like a sudden drift of a small fraction of one Hz during the transmission of G3AQC this evening, Wednesday 24th Jan. I don't think it's my RX or sound card, as the signal of M0BM
I noticed what looks like a sudden drift of a small fraction of one Hz during the transmission of G3AQC this evening, Wednesday 24th Jan. I don't think it's my RX or sound card, as the signal of M0BM
[snip] I sympathise with those feeling the pressure of the modern age as they grow older. This is because I too feel this pressure (although in Amateur terms I am a spring chicken at 51), but in my
[snip] M0BMU 135.922, Fs average +2 dB(uV/m) G3ACQ 135.924, Fs average +5 dB(uV/m) [snip] Väinö, are you sure to not have them reversed ? I am at work now, and don't have the screen grabs handy, but
Same here in Italy, JN45SL. The two stations were received with solid white lines on a dark blue background, I would say 'OOO' :-) And this just using the 14 MHz dipole as antenna (low gain, but almo
[snip] This 11.024XXX divided by 2 is the "corrected clock value" that JVComm32 needs to print a straight vertical line when in HF-FAX mode , 60 lines per minute. It's not some measured reference va
