Re: [Repeater-Builder] Squelch action on 10 m FM

: 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 other tx deviation

Re: [Repeater-Builder] Squelch action on 10 m FM

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 when

[Repeater-Builder] Squelch action on 10 m FM

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