Re: Pop mute
John, AD0RW proposed exactly that (grounding PIN 3) back on April 30 with his “Simple Audio Muting Circuit” (message # 25870) that grounds PIN 3 of the LM386, triggered by PTT and holds it after PTT release
using a 0.1 uF Cap and a 430K resistor. This is what I am currently using and it works quite well except I do need to tweak the resistance so that the mute holds a little longer
as I am still getting a bit of POP on the TX -> RX transition.
>From: Dexter N Muir
>Date: Fri, 18 Aug 2017 16:41:53 EDT
>p.s. most of the development of this was done in the thread of post#30470, and seemed fixated on tying either pin 7 or pin 8 to 0V or +12. I put my rationale for taking pin 3 to 0V in there - why on earth are people persisting with >anything else?