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Trying to debug a faulty ubitx v4 with old eyes so an electronic copy of the component placement or board silkscreen would really help.

73 Bob GM4CID

Bob

Please scroll down less than a week ago, someone posted some very nice photos of front and back side. Hint, sort by topic and you should see it.

Curt

Thank you, Kurt, will find and download these photos for future reference.

MicroBitx is now working, had installed what I turns out to have been a corrupt version of the latest KD8CEC sketch, BFO clock was very off frequency so no demod or mod.
Re loaded the original HF SIGNALS sketch and all burst into life.
Fresh download and install of the same CEC sketch now working perfectly.

Moral, I should have known better and checked the basics first before looking for a more complex fault.