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UT1HZM > TECH 10.03.24 16:10l 20 Lines 731 Bytes #999 (0) @ WW
BID : 24880_UT1HZM
Read: GUEST
Subj: Re: Trouble with UV5R Android-phone
Path: IZ3LSV<DB0ERF<OK0NAG<F3KT<F3KT<UT1HZM
Sent: 240310/1433Z 24880@UT1HZM.KREM.POL.UKR.EU BPQ6.0.24
RN1M:
>
> Maybe, of course, there is something more powerful? Essentially, you just need an external vox with minimal delay (no delay at all) to trigger the PTT.
>
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.
73, Sergej.
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