Absolutely DON'T give up on it Tom. I had great service from one of these and put it through absolute torture for years running WSPR. I finally blew up several chips by shorting one of the output transistors (drain and gate I think from memory) while trying to measure the powered up voltage on one of the drains. This put about 12v onto the driver chip, and cascaded the disaster onto probably the si5351 which put it beyond repair for me, because I can hardly see the surface mount chip let alone remove and replace it. Your problem is likely much simpler. I loved that little radio and its hardy performance, it certainly put up with some abuse from me. I spent a very pleasant evening on one Christmas Eve building it, and to my surprise, because i have less than great close vision nowadays, it was up and running on WSPR before Santa came down the chimney. I hope you can fix yours. Mine had many changes of output fets caused by the two minute hell of WSPR to those tiny plastic fets and my flaky full wave loop antenna going out of tune. I lost count of how many times I replaced them. In the end, the traces were gone off the board and I had to make an off the board PA for it. Keep asking and seeking the fault. I think you'll soon have it running.
