Thanks Jack
I replaced the nano and DDS boards from the working unit to the non-working unit, and still does not work..
I checked the transistors with an on-board transistor tester and it shows two diodes in series.. ?seems that may be the problem... ?I have checked the board with a magnifier and it looks good along with the solder.?
I checked each component with my tester before soldering on the board and each tested correctly.
I will replace the transistors and see if that's that problem. But I cannot imagine why they would be bad..
I have tested the buck regulator and it seems to be stable with a little noise on the output, but the other board does the same...
Thanks for the help and a great project... seems that I managed to get one that's a problem..
BTW: the working unit is great. I began with a 49er that worked fine but the audio was a little low.. ? the VFO kit and new 49er kit is super.. ?The receiver is very good for such a small unit and the transmit output is about 3 watts running on a 12 volt battery.
bobbie
kd4lv
