Agreed Stefan- this is the "less turns" LF loop not the VLF version Octoloop Im pre testing and Ill be probably wasting a bit by reducing the Q on the larger one as Ill have more V - I just wanted to stay away from active preamplification for the moment and see whats really there - blanking efficiency looks ok even with this Q - tuning across the loop passband sounds like a tight <1.8kHz SSB filter :-)
Its not perfect but giving better s/n that my baseline omni which is the right way to be going -
At the moment Im testing using the
W@G SLMS for demod and recovered audio into the outboard soundcard/speclabbut Ill try direct to the Asus card when Im sure Ive got the antennae correct - propagation this winter has just been awful up here and roll on less Solar activity wearing my LF hat -
Date: Tue, 4 Mar 2014 20:40:57 +0100
From:
[email protected]To:
[email protected]Subject: Re: LF: QRSS 120 on 29.499 starts 2200...and NAA
Hi Laurence,
Am 04.03.2014 20:34, schrieb Laurence KL7 L:
Bob - will be listening - I need to move the passband
of the loop down 200Hz so will be tweaking tonight. The Q is very high -
Do you need the high Q to get a proper signal level (e.g. to bring it
across the soundcard noise)? Otherwise a lower Q would be better, in
order to get a better noise blanking efficiency.
73, Stefan/DK7FC
