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Old 10th Apr 2018, 12:24 pm   #4
ajgriff
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Join Date: May 2004
Location: Halifax, West Yorkshire, UK.
Posts: 2,583
Default Re: Telequipment/Tektronix D75 No trace on Power Up.

Welcome to the forum Bill.

I don't think you mentioned the 30V unregulated supply in your post. This is fused and feeds the EHT transformer primary. Worth checking I guess.

From what you've described it certainly sounds like the problem is being caused by component failure in the HT circuits dragging down the power supply lines. This is not uncommon in this family of scopes. Some forum searches on Telequipment D63, D75 and D83 should reveal some previous threads discussing such issues.

Alan
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