At 8/20/2009 23:17, you wrote:
>John, how's this for an experiment...
>
>Configure a repeater with two receivers, one built for +/- 5 kHz
>deviation, the other for +/- 15, feed them from a splitter, use audio from
>the narrow one, but allow a DTMF command to select the wider receiver's
>COS wh
ups.com
Sent: Thursday, August 20, 2009 4:36 PM
Subject: [Repeater-Builder] Squelch action on 10 m FM
BTW, the less the deviation, the harder it is to design reliable squelch
circuits. It was easier in the +-15 kHz deviation daze. The supersonic audio
spectrum will be different for oth
Adam,
Ten meter FM requires some different approaches mostly due to HF propagation
characteristics and less importantly, general HF background noise.
1) When sigs are propagated via the F2 layer (the most common kind of
ionospheric propagation, after sporadic E-layer), we all know they suffer
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