It is a combination of power inrush and charging/discharging of the coupling cap between Mike amp collector and Rx audio amp input. ?Yes...not easy to fix.
_-_
Sent from my Verizon, Samsung Galaxy smartphone
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-------- Original message --------
From: "Giancarlo via Groups.Io" <i7swx@...>
Date: 8/23/17 2:35 PM (GMT-07:00)
To: BITX20@groups.io
Subject: Re: [BITX20] I7SWX PTT Pop Mute
Hi Arv,
Thanks a lot for the prompt reply.
I did not follow the BITX20 project so I did not knw about the problem and measurement you did and reported.
I guess the pulse was on the audio PA power line, right? You are right, it may be a complicated to find a solution.
I will try to think ... hi.
73
Gian
I7SWX
