RN1M > TECH 11.03.24 20:45z 32 Lines 980 Bytes #132 (0) @ WW BID : 2170_RN1M Read: GUEST Subj: Re: Trouble with UV5R Android-phone Path: ED1ZAC<ED1ZAC<LU4ECL<LU9DCE<VA3TOK<VE3CGR<PA8F<PI8LAP<RN1M Sent: 240311/1928Z 2170@RN1M.SPB.RUS.EU LinBPQ6.0.24 Hello, Sergej. On Sun, 10 Mar 24 14:33:00 Z UT1HZM wrote: > There is more simple audio-vox-ptt option I'm once done about 20 > years ago for friend's handheld TRX: > > https://www.qsl.net/iz7ath/web/03_digital/01_sb/fig/fig04.jpg > > Just check to have enough audio level to driver well mosfet > (adjust 2kOm R to other if need). > And possible if packet software out the sound only on one channel, > you need connect together L and R input points on schematics. > So first make it as "bug-style" prototype to check and adjust all. > BS170 can be to replaced by any modern 2N7000 or many other SMD > low gate-threshold N-mosfet. Oh, just what you need! Simple and angry. Thanks for your comments. I also liked this design, at the link (without USB soundcard, principle same): https://kb9rlw.blogspot.com/2016/08/cheap-and-easy-to-build-digital-modes.html 73! -- 1200 baud it's greater, than zero bits per second :) Best regards, Sergey Ievkov <RN1M@RN1M.SPB.RUS.EU>
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