Author Topic: PTT error if 12v lost at RRC Radio Unit - K3  (Read 909 times)

DM1CG

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PTT error if 12v lost at RRC Radio Unit - K3
« on: 2019-11-24, 20:07:20 »
Hello all

see yesterday a new "bug" .
If my RRC Radio lost the 12V my K3 switch to TX if the radio is one.
I have the last firmware 2.95 inside the Unit.

PTT come over teh PTT IN RCA not via RS232 CAT.

any Idea ?

best 73 de Carsten
DM1CG

sm2o

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Re: PTT error if 12v lost at RRC Radio Unit - K3
« Reply #1 on: 2019-11-26, 14:11:03 »
Hi

It's not firmware related. Since it's transistor which key the radio, the resistance will be low enough to key the Radio when the RRC has no 12V. You can put a opto coupler in between if it's a problem. Probably a serial resistor is enough.

73 de mike


DM1CG

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Re: PTT error if 12v lost at RRC Radio Unit - K3
« Reply #2 on: 2019-11-27, 09:30:26 »
Tnx for the answer Mike

I never tested it befor.
I will update the cable.

vy 73 de Carsten
DM1CG