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RE: Sherwood S-5500ii power transformer woes? Bad filament secondary?

Posted by jamesbythebay (A) on May 31, 2024 at 12:12:38

In Reply to: RE: Sherwood S-5500ii power transformer woes? Bad filament secondary? posted by Triode_Kingdom on May 30, 2024 at 17:26:41:

Triode_Kingdom,

Thanks for your timely and most helpful response. Reading it, I had one of those head-slapping "Doh!" moments. Yeah, I was so focused on my belief that I was taking measurements from the correct leads that I was ignoring what the results were trying to tell me. I'm pretty sure that I mis-marked one of the leads when I replaced them all.

And just like that, I was talked off the ledge.

Re-checking my continuity tests, I found no shorts.

Measured voltages @115VAC in: B+ is 171VAC, Bias is 25.7VAC + 25.7VAC = 51.4VAC, Filament is 3.3VAC + 3.3VAC = 6.6VAC

Many thanks, Triode!

Btw, I'm doing a long overdue PS overhaul on this unit. Have you worked on this model before, and made any modifications to the PS? If so, would you mind sharing your results?

Cheers,
James

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