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Re: 17 meter QCX output issue.


 

Dennis,

The collector current limit for the 2N3906 is around 200ma. ?The suggested replacement PNP transistor MPS751 is around 2000ma. ?I think the kit draws 500ma on transmit so you need to find a PNP that will at least do 500ma.

Follow the suggestions in the previous post. ?Also check the continuity from the RF connector through L1, L2 and L3 with a VOM. ?That will confirm they are connected up to C29. ?

The other thought is one of the power FETs is not soldered in good. ?Reheat all three final FETs.

Keep poking around. ?

Bill N7EU

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