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QMX low TX power on some bands


 


I have just built my second QMX,? this one for the high bands.

PCB V2 and latest firmware from Friday.? Built for 12v operation

Once built I tested it with a dummy load.
My results were

14mhz 4.4w
18Mhz 8w !
21mhz 0.3w
24Mhz 6w
27mhz 2.5w
28Mhz 1.5w

Tested into a dummy load, showing 1:1 SWR in all cases.
I made the output transformer using the RWTST for 12v operation

I have checked all the diodes are the right way round.
Went round the board giving it a visual check and also checking that I think the inductors soldered ok.

Can someone point me in the right direction please.

Mike
M0MDS



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