Re: Letting the smoke out

Ion Petroianu, VA3NOI

You should see the voltage that the power supply provides at the drain of IRF510 when in receive and very close to that when PTT pressed as there is almost no ohmic resistance in the circuit if everything is good.

The current path is power plug, wire, power switch, L6 and T7 winding 1-6 and all the PCB traces in between.

I would get the ohmeter and try to find out where are you dropping so much voltage when no current is running through (from 12V to 9V).



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