Re: d4d off frequency

Adam Rong
 

The barrel or the external ring of the power connector should be grounded so it is okay to touch the plated dc jack hole.

For TO-126 package transistors like Q4, the hole has insulation already so a metal screw and a thermal pad will do the work of insulation from the PCB panel.

Thanks,
Adam

在 2019年8月8日,下午10:17,ron mcmurray <hamshack@...> 写道:

the barrel or the power connector was touching the plated thru hole of the back plate.the screw in q4 grounds the collector to the back plate. it messed with the voltage,not sure if frequency was off or it just was not working right. easier to use nylon screw than try to make hole bigger
ron kc0tdj

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