453 SN: 043226 Anode Now Solid State


Joseph Rooney
 

Chasing down a gain change warmup problem, I decided to replace the 5642's in the anode with replacements I found on line. Pictures here: https://flic.kr/p/EV6GoL https://flic.kr/p/EV6GoL https://flic.kr/p/EV6GQ7 https://flic.kr/p/EV6GQ7 after replacement of 5642's with two ESJA52-10 from HVStuff.com . Didn't fix the problem, I had to order them from China, took less than a week. Found 5kv rectifiers at Halted that were just too big to be in series. https://flic.kr/p/F6Ajfn https://flic.kr/p/F6Ajfn


These are far smaller than the 152-0408-00 we routinely used at Tektronix to replace 5642's and I'm quite sure they will work in your 5642 replacement scheme.


Joe

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