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Old 26th Sep 2019, 10:07 am   #6
Steve G4WCS
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Join Date: Sep 2004
Location: Preston, Lancashire, UK.
Posts: 354
Default Re: Cobra 150-GTL ( cybernet PTBM121D4X )

now for a roger beep.

there is provision on the PCB, for a roger beep circuit and relay, but without removing the board it looked far too fiddly, and I wand it to be a reversible mod anyway.

there is a circuit for a bepp int the cybernet service manual so laid one out on veroboard.

with a couple of component tweaks Ive got it to sound how I want

https://youtu.be/

https://youtu.be/5yFKtPBtcqI

https://youtu.be/6E7PqIdBcxE
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