Sunday, November 6, 2016

LF season approaching

As the winter is approaching it was time to think LF again. When I bought the main parts for the MF amplifier from Dave G0MRF at the HF convention I also ordered one of his preamp kits. I managed to squeeze it into a small pomona box, time to try it out




Initially I connected it to my Alpha Delta DX-EE and ANAN-10 and left it receiving WSPR using K1JT's new1.7.0RC2 WSJT-X software. It seemed to do well:

Time Call dB Loc Power km
18:22 G4FTC -21 IO91pi 2 137
18:36 PA0A -24 JO33de 1 591
18:38 LA8AV -28 JO59cs 5 1151
19:56 G3WCE -29 JO02pt 1 255
23:52 F1AFJ -27 JN06ht 1 625
00:46 DJ0ABR -29 JN68nt 0.2 1148
00:54 G8HUH -19 IO81mg 1 103
01:16 PA3ABK/2 -25 JO21it 0.5 481

The preamp reduced the LOS droitwich 198kHz on my system.

During the evening  I wondered what was on 136kHz. So I dug out my old G0MRF 136khz preamp and let it run for a short period, while, again connected it to my Alpha Delta DX-EE and ANAN-10 receiving WSPR decoded 2 stations

Time Call dB Loc Power km
22:00 G8HUH -20 IO81mg 0.1 103
22:04 2E0ILY -12 IO82qv 0.01 91

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