I have junker TS-520s I been trying to get to transmit, no output not
even a hint, there is no high voltage anywhere in the final section,
tubes light up and get hot but no high voltage and placing a receiver
next to the rig on transmit there is a slight hint of a carrier but
very faint and right on frequency. The tubes check good and have tried
different ones with no sucsess.

Any thoughts on what to look for?

Gil