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Date: Fri, 05 Aug 2011 01:43:31 +0200
From: =?ISO-8859-15?Q?Stefan_Sch=E4fer?= <Stefan.Schaefer@iup.uni-heidelberg.de>
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Subject: Re: LF: CW sked on 137 friday morning?
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Ah, forgot to mention the TX frequency: 136.8 kHz. I'm listening in a=20
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 Sch=E4fer:
> 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=20
> LF band when beeing in the forest with the loop! The band noise is=20
> about 15 dB above the soundcard noise now, which is OK for today but=20
> not for a quiet winther sundday morning. BTW i built M0BMUs loop=20
> preamp and it works excellent too! Still have to compare the homemade=20
> RX to the 706+preamp...
>
> DCF39 peaked 80 dB S/N in 1.5 Hz. The sferics were much louder=20
> compared to the background noise. Inbetween the sferics, CW reception=20
> would have been possible. I even heared some short beeps, probably=20
> someone was testing without hearing my call.
>
> The UHF link works excellent! About 1 W RF power to a homemade 1/4=20
> wave wire on the car roof was totally enough to reliable key the PA.=20
> Even normal CW is possible without problems. Just a few times the=20
> squelch opened unwanted.
>
> When installing a large RX loop in the trees, resonated and matched to=20
> 50 Ohm, i can make a tour with the bike and just the netbook and the=20
> 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=20
> city, about 5 km, where my earth antenna is placed. I'll take the=20
> 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=20
> small PI filter should match and band limit the whole thing... 800 to=20
> 50 Ohm.
>
> Is someone QRV tomorrow? Ah, i think about 8...9 UTC... Other=20
> suggestions? (no, no other hobby).
>
> 73, Stefan/DK7FC