Re: Help with Tektronixs 492 S.A. PSU fault.

Nick Gregory G0HIK

Thanks all for the helpful comments.

I've just got it licked, well it looks like it anyway.
It was an overload on the +/- 15v rails. I thought I had disconnected every consumer of theĀ  +/-15v from the motherboard, but hidden under the YIG filter was a supply to the 100MHz L.O. Low and behold there were two +/- 12v regulators, decoupled by Tants. One was S/C but both changed out of course.

Several lessons learnt, every day is a school day, I just need to try and retain it all.

Nick G0HIK

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