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RogerWalker · 10th May 2021, 7:37 pm

I found the HV osc transistor for the 1740A and have ordered one - HP part 1854 0433 - eight quid on a well known auction site. Fingers crossed it will be what's causing the lack of EHT.

10th May 2021, 7:37 pm	#12
RogerWalker Hexode Join Date: Sep 2005 Location: Powys, Mid-Wales, UK. Posts: 289	Re: HP 1742A scope I found the HV osc transistor for the 1740A and have ordered one - HP part 1854 0433 - eight quid on a well known auction site. Fingers crossed it will be what's causing the lack of EHT.