Dear Andy, LF Group, At 09:59 19/03/2002 +0000, you wrote: Has anyone tried changing the clock source on a Soundcard for a different frequency ? For a job here at work we need to sample more accurate
Dear Mal, LF group A couple of suggestions to try with your loop: ...My loop parallel resonated on 136 khz gives about the same signal/noise as the vertical, no discernable difference on RX... This i
Dear Alberto, LF group, I briefly tested your PHD radio software last night with my SPM19 - so far it is working fine, after suitable adjustment of the "volume control" mic input settings. Will inves
At 03:13 13/03/2002 -0800, you wrote: BTW I have had some problems with burning at the top of the fibre glass mast and am wondering whether the filler might be carbon black?? 73, John, G4CNN Dear Joh
Dear John, LF group Some comments on John's queries about ERP and measuring antenna efficiency - if of no interest, please delete now! The first thing is to be clear about what is meant by ERP. There
Dear LF Group, I had a 136kHz contact with DF6NM on Saturday evening, with good copy of both DFCW and Hell modes from Markus (see attachment). I wonder if DF8ZR had any luck with his receiver? Cheers
there will be a meeting with young people on Saturday next weekend. Location is Goslar near Hannover(Germany). The subject is to build a very simple LF-RX in a couple of hours. At 17:00 to 18.00 UTC(
Dear Mal, LF Group, At 18:38 08/03/2002 +0000, you wrote: ...This first observation puts some doubt on some previous tests on Decca sites with a small vertical in the vicinity of a large ground radia
I had something like that once - it turned out to be coming from a computer printer that had a flashing tell-tale LED when in standby mode - it was obvious the noise and the flashing were synchronise
Dear Laurie, LF group, Got home just in time to see you signing off with John, whichever John that was - perfect copy on the Jason signal; but then your signal was 589 here anyway. Cheers, Jim Moritz
Dear Giulio, LF Group, I find the RA1792 generally good on LF - it has a useful selection of filters, sensitivity is fairly uniform down to about 15kHz, quite good strong signal handling, and it has
Dear LF Group, As I mentioned a few weeks ago, I have been having problems with local mains-generated QRM from an unknown source which made it impossible to copy the weaker signals on the band. Over
Dear LF Group, At my QTH I find there are basically 2 types of "mains" LF QRM - The first type seems to be harmonics of the mains frequency, and originating from phase-controlled devices like dimmers
Dear Marc, Cesare, Alberto, LF Group, Thanks for the reports and images of the Jason signal last night - I transmitted from about 1900 - 2030 utc, with the full 1200W on TX, giving about 0.4W ERP. La
I see on the reflector some Jason test but what is the "Jason frequency test" and when ? Dear Marc, OK, then I will transmit some Jason sigs this evening - about 1900utc for an hour or so, QRG 137.50
Dear Ed, LF Group, At 11:58 26/04/2002 +0400, you wrote: I continue to have the big QRM from: Alfa(Omega) (azim~196 degr, fq ~12kHz, QRB~200km, pwr~300KW) Chajka(Loran) (azim~240 degr, fq~100kHz, QRB
Dear LF Group, I transmitted Jason test sigs as advertised last night at 100W (1730 - 1750), 30W (1800 - 1820), 10W (1830-1850), 3W (1900 - 1920), 1W (1930 - 1950) and 0.3W (2000 - 2020), give or tak
Dear Wolf, Markus, Stewart, LF group, Thanks for last night's Jason tests - conditions here were rather quiet, with the result that I was getting reasonable copy from DF6NM at the 1W level - at 0.1W,
Unless there is strong QRM on an adjacent frequency, please use a wide (SSB) filter, and put the desired signal near the center of the IF passband. This makes it easier for impulse noise rejection a
I must let you into a secret... You have the details all correct but the normal operator's name is Jim. It was me at the key, and my TX... Who was that masked man? :-) G3XDV was also calling you, but
