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LF: low noise and OE5ODL

To: [email protected]
Subject: LF: low noise and OE5ODL
From: Stefan Schäfer <[email protected]>
Date: Tue, 13 Sep 2011 17:03:30 +0200
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LF/VLF,

Very low noise today on LF and VLF.

Ossi/OE5ODL is QRV again, today on 8970.05 Hz, with the characteristic drift. A good ID :-)

Just found some time to build a LF preamp for the ferrite antenna. Maybe someone has fun and time to make some acty on 137.7 in a hour or so? Would like to compare signal levels and S/N of both, the 50 Ohm preamp and the high-Z preamp in a quiet location.

Screenshots will be posted here...

Best 73, Stefan/DK7FC

PS: Will run a QRSS-3 beacon on 137.730 kHz, using 0 V PA supply voltage (i.e. no supply). There is a weak signal anyway, just because the FETs gets switched! This signal is visible at DF6NM in the QRSS-60 window in 174 km distance! ;-)


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