Re: TEK 7704A pre-death behaviour a clue to the fault?

Göran Krusell

Hi, is there a hissing sound? If so you have got arcing. It could be the HV multiplier that is your culprit, this would be bad news. Try to locate my message from several years ago for more details.
Check all diodes on the Rectifier board by using two probes and make differential measurements. You will see if the diodes conduct in the forward direction only, and this works in tick mode.

Good luck

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