a) is there any sound card that is better than the others? (Such as "Sound Blaster"?) I am told that some waterfall programs will not play on some laptops. ("Hamview", for instance, does not use stan
For my own purposes I have defined a 'measure' of the qrn in 'CPM' ..... - Crashes per Minute! as counted on FFTDSP. Here we need kCPM and MCPM !!! Then, FPM (flashes of a neon lamp in parallel to t
Sunday 7 June Low local noise in the morning (strange). Active from 0700z, calling in QRSs. Sked with G3XDV,but no QSO... HRD HB9ASB, quite low (429 QRN?) Seen G3YXM in QSO with Toni; it would have b
Gamal and all, I had very good results with my loading coil. The construction is probably rudimental, but works and may be seen on the web site of G3YXM (look at pictures). The coil has about 3,5 mH,
Hi all, I had the possibility to observe the 137 kHz RTTY signal tonight. It was loud and clear by ear around 0230z (4:30AM CET). Level about 1 to 3 microV. It faded away between 0300z and 0308z, the
Hi all, I had the possibility to observe the 137 kHz RTTY signal tonight. It was loud and clear by ear around 0230z (4:30AM CET). Level about 1 to 3 microV. It faded away between 0300z and 0308z, the
... It was loud and clear by ear around 0230z (4:30AM CET). Level about 0230z is 0430 CEST, surely? (CET = z + 1 hour, CEST = z + 2 hours) 73 de G3PAI Yes, of course. But it was 4 'o clock ... I was
Agreed ... complex band plans will not be memorized (and respected). The upper 200 Hz for QRSS are fine for me. Also the lower side for testing and short-time beaconing. The lower 300 Hz are unusabl
Hello all. This message may be off-topic here, but I don't know of better places to talk about this. By first, the facts. A dear friend, Renato IK1QFK, since many years monitors the natural radio sig
Hello all, after some months of QRT, this morning QSO in QRSs with Gerd DJ5BV. Reports M-M. Low QRN up to 1000z; continuous "cracks" at S9 (35 dB/uV) in the afternoon. Marco Bruno - IK1ODO spin@inret
I've never seen a response to Marcos query about the signal on 1025 Hz. Here a possible explanation: Of course I can see and hear the signal, like many others in the VLF/ULF range, at my QTH. They ar
I called in QRSS this morning on 137.710 and 137.720, between 0800z and 1000z. A station answered, but the QRN conditions here are still prohibitive for a decent QSO, so after a few tries I gave up.
On several occasions I have found myself having to re-learn and extend my knowledge of basic radio theory. The contributors to this LF reflector have helped significantly in improving my understandin
The notes point out that the 136.8 frequency is already allocated on a primary basis in countries outside DL, and any allocation must not cause interference to these. Perhaps there are even more tra
Hi all, I agree with Toni observing that a 500 Hz filter is too wide for serious weak signal work. I use a Racal 1792, modified with 300 Hz and 100 Hz filters, followed by an audio (analogic) filter.
At 10.09 03/10/99 +0100, Tony G3ZRH wrote: However, although the Russian long range Alpha navigation transmitters around 11.9, 12.65, 14.1Khz continue to come through clearly using the Datong convert
Hi LF Folks, I had been active in QRSs on Saturday and Sunday. Managed a QSO with Petr OK1FIG, with excellent signals (329 by ear at the end of the QSO), my report M because of QRN. New country for m
Interesting. I had dinner with Geri DK8KW on Saturday evening at Windsor, and even earlier saw him at the operating position of GB4RS. Perhaps it was his second op left back in Germany? It was Sunday
And thanks to you, Alan, for finding the informations. Please ask VE1FTL for the exact nominal QRG of the transmitter. At least, we have a positive ID for the signal ! (is the old tube TX available
