Re: Tektronix 475


Simon
 

With the CRT removed, the two neon bulbs between the cathode and first grid still do not light and the potentials are the same on both grid and cathode (-2450V). I am not sure how the beam find works but I thought it re-biased the grid, maybe not. I think I will have to look more carefully at the grid bias circuitry.
Simon

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