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RN1M > TECH 11.03.24 21:33l 32 Lines 980 Bytes #999 (0) @ WW
BID : 2170_RN1M
Read: GUEST
Subj: Re: Trouble with UV5R Android-phone
Path: IZ3LSV<I0OJJ<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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