Fascinating - just had to go and look-up Schumann resonances in Wikipedia. The article there says that the waveguide has a harmonic response at 59.4Hz, and gets excited by the US power grid. In which
jose - I don't know, not being anywhere near the actual site. However, I've forwarded this to Keith G0WYS who should be able to tell you all you need to know... Andy G4JNT www.scrbg.org/g4jnt
GB3SSS from Poldhu, Cornwall, is back again for a few months. Only this time it is transmitting on 3597.0kHz, for 80m Transatlantic propagation tests over the winter months. Transmissions are every 1
Has anyone had any success, or otherwise, with the WSJT JT2 or JT4 modes on LF? Joe would love to hear of any LF use of these. Also I'd like to include something, in Feb's Data coluumn in RadCom. It
Which are the receivers you have encountered that do suffer this problem of non-switchable AGC? It doesn't sound like a very healthy trend at all ! I'd use an SDR-IQ for LF these days. In fact I use
If you have the sort of SDR that uses I/Q drive to the soundcard, then it can be tedious passing the recovered audio out to other software. It can be done using a utility called Virtual Audio Cable (
Yes, that's a good point. What has failed on the RA1792, Laurie. I've got a service manual for that Rx filed away somewhere. Andy G4JNT On 11/01/2008, Alan Melia <[email protected]> wrote: Hi
What a fantastic range of RF products,! And all without the nausea of long delivery times, extra customs delay and rip-off duties being added on. Incidently, why is "Low Noise" the Italian for, well,
Warren's comments about "setup filter" are not correct What he is actually talking about is the down sampling / decimation process which takes place in the AD6620 Digital Downconverter chip. (In fact
.. and its entirely up to you to somehow keep the PC clock accurate enough! The prog was thrown together in VB6 this afternoon and barely tested enough to ensure it did what it said on the tin. I ca
A problem with the scheme you suggest, Graham, is that PC clocks maintain time badly, and will drift by several seconds overnight which makes a mockery of the idea of precisely timed sequential liste
So does an MRF150. And that only needs 50V Andy G4JNT www.scrbg.org/g4jnt On 01/02/2008, Ken Wright <[email protected]> wrote: Hi Mal. Do you have the data for a TT22?, they have an input o
Manually type-in the bit that gets carried onto the second line - in your case the "80201" Andy G4JNT www.scrbg.org/g4jnt On 01/02/2008, Ken Wright <[email protected]> wrote: John. I am una
There have been 18 downloads of the beacon timing software PCBCN this month. Its still there... http://www.scrbg.org/g4jnt/PCBCN.zip Andy G4JNT On 29/02/2008, Graham <[email protected]> wrote:
I was happily running WSJT 5.98 alongside WSPR (command prompt) and no problems. Just trying out the WSPR GUI. It doesn't appear to come with any instructions or attached help, no menu options to con
Set the new freq just after you announced the QSY, and get the occasional demod at DF = +430Hz which is correct for 1700Hz sync. But S/N has fallen and is now in the region of -30dB S/N so oughtn't r
The signal has fallen off considerably. Haven't had a valid JT65A decode since 1759 ( on both timeslots) and not even a whisper of a WSPR signal since 1816. The WSJT averaging is showing about 9 / 22
