Ah, forgot to mention the TX frequency: 136.8 kHz. I'm listening in a
250 Hz CW filter.
I'll call in QRSS too, maybe.
I cannot QSY my TX when using this UHF link...
73, Stefan
Am 05.08.2011 00:23, schrieb Stefan Schäfer:
LF,
I want to call for CW skeds now,i.e. for tomorrow morning.
After testing the UHF link today i was impressed by the silence of the
LF band when beeing in the forest with the loop! The band noise is
about 15 dB above the soundcard noise now, which is OK for today but
not for a quiet winther sundday morning. BTW i built M0BMUs loop
preamp and it works excellent too! Still have to compare the homemade
RX to the 706+preamp...
DCF39 peaked 80 dB S/N in 1.5 Hz. The sferics were much louder
compared to the background noise. Inbetween the sferics, CW reception
would have been possible. I even heared some short beeps, probably
someone was testing without hearing my call.
The UHF link works excellent! About 1 W RF power to a homemade 1/4
wave wire on the car roof was totally enough to reliable key the PA.
Even normal CW is possible without problems. Just a few times the
squelch opened unwanted.
When installing a large RX loop in the trees, resonated and matched to
50 Ohm, i can make a tour with the bike and just the netbook and the
homemade RX (fed by the USB) and another 70cm mobile QRP TRX.
Tomorrow morning i want to do another test even farer away from the
city, about 5 km, where my earth antenna is placed. I'll take the
single turn loop again with me.
I hope to get a QSO partner then.
Will try to do something with the earth antenna as a RX antenna. A
small PI filter should match and band limit the whole thing... 800 to
50 Ohm.
Is someone QRV tomorrow? Ah, i think about 8...9 UTC... Other
suggestions? (no, no other hobby).
73, Stefan/DK7FC
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