Hi Stefan,LF, the tx is still on ,but there are no stations in a radius of 40 km who would be willing and equipped to recieve my signal on 8.970.025 khz,and the step to your grabber is to far,but i a
Jim, VLF, Am 12.03.2011 01:51, schrieb James Moritz: Dear Andy, Wolf, LF Group, Over last night and today I did some further tests with my cheapo USB sound card and calibration source, but this time
That is very much what I feared would happen. USB interfaces run based on a clock of 6MHz, which is unfortunately an exact sub-multiple of the codec reference. So the difference between the cloc
Dear Andy, LF Group, Not sure if the first mail I sent on this topic ever got through - not to me, anyway... I have been using a USB sound card for VLF reception with my lap-top PC, and, like all the
Hello Pete, Am 09.03.2011 19:36, schrieb M0FMT: Mal..... for my ten cents worth. Without being able to add modulation or on-off keying then no QSO is taking place. I suppose you could say if there is
Dear Andy, Wolf, Markus, LF Group, I tried some further experiments with the same USB sound card and an additional computer (the one I am writing this mail on). The "real" offset in sound card clock
Stefan I listened to that when you posted previously and waited to read the comments, I can't remember seeing any, maybe everyone was speechless like me, all I could manage was WOW. 73 Eddie G3ZJO On
Dear Andy, Wolf, LF Group, Over last night and today I did some further tests with my cheapo USB sound card and calibration source, but this time using a different laptop PC. Result - after some fidd
Mal..... for my ten cents worth. Without being able to add modulation or on-off keying then no QSO is taking place. I suppose you could say if there is a carrier then some one is in the shack but tha
On 10 Mar 2011, at 11:06CET, Stefan Schäfer wrote: While it is trivial to do a QSO on 20m in 10000km distance it is something special to reach 10km on VLF or on Laser-TX or 47 GHz and above. A VLF x
Roger It is not difficult in a sensible time. Had OE5ODL been in QRS 3 or10 mode we could have had a QSO. I could have replied on 137.7 since I do not have a permit for 9 khz. I have worked Moscow an
OK Stefan I need a "Dope Slap" for my comments below. So impressive that is much better than I had hoped for because its not just slow CW either. There are a lot of potential stations inside that rad
Pete It depends what the objectives are. In my view amateur radio communication has been much advanced as a result of the recent experiments at VLF. I agree that having some meaningful 2-way exchange
Hi Andy, Jim, I am actually using a little USB plugin soundcard ("3D Sound" for 2.60 Euro) for my VLF grabber at 48 ks/s. Locking to GQD shows that samplerate has remained fairly stable within a few
I agree with these comments, and have said it before. If all radio amateurs on all the other bands used this system of uh bandwidths and day long qso's Amateur Radio would cease as a hobby. The aim s
Hello Jim, Andy, and group, Many thanks for the detailed analysis - having an easy-to-build GPSDS (GPS-disciplined soundcard) would have been really nice. Anyway, if you have a GPS receiver with 1-pp
Have you tried a proper upmarket high quality USB sound interface? I have an Edirol UAX-1 here - although its attached to an old LP recrod deck at the moment (been transcribing old LPs) . It'll be
Dear Andy, LF Group, Have you tried a proper upmarket high quality USB sound interface? No, it is one of Maplin's finest... it uses a C-Media CM6207 USB/audio codec chip. I have an Edirol UAX-1 here
Typo, should read "within a few tenths of a ppm" Sri, Markus Hi Andy, Jim, I am actually using a little USB plugin soundcard ("3D Sound" for 2.60 Euro) for my VLF grabber at 48 ks/s. Locking to GQD s
