Re: Pop mute
开云体育Here is my solution to the PTT Mute and the addition of a Linear Amp keying circuit. I just dead bugged the H11AV1 Opto coupler on top of the LM386 to make the connections as short as possible. Any Opto coupler with an NPN transistor should work, I just had a slug of these GE H11Av1’s in my junk box. Good Luck…see you on 40. KC5RT Fred. ? From: [email protected]
[mailto:[email protected]] On Behalf Of Ted Doell
Sent: Friday, August 18, 2017 2:09 AM To: [email protected] Subject: Re: [BITX20] Pop mute ? This is the version I used. I see when I have another look it is version3 anyway it seems to work for me. circuit as below. I added at the junction of the 1k resistor and the emiter of the 2N3906 a 22mf Tantalm and a 103 ceramic capacitor and feed the 12v via a 100ohm resistor. Ted ? On 18/08/17 6:37 PM, Rajendran Mayilsamy wrote:
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