Service switch can be removed & jumped out to test.
After doing Find M Keep M's checks the most likely
thing if its NOT self induced is the caps in the vert
feedback. The ones going from the plate of the output
back to the grid of the V osc. Also the gang controls
they used were NOT very good, especially the H. hold.
We stocked them. So clean the crap out of them & the switch.
These sets even when not old often needed a lot of work.
But yours looks clean & not over heated. They are
quite capable of an exelent pix if done right.
BTW if you need a manual & cant get a free one PM me.
73 Zeno
