Hoffman Amplifiers Tube Amplifier Forum

Amp Stuff => Tube Amp Building - Tweaks - Repairs => Topic started by: punkykatt on March 07, 2025, 03:55:07 pm

Title: 47uf/50v caps in place of 47uf/100v cap
Post by: punkykatt on March 07, 2025, 03:55:07 pm

Hey Guys, working on a Hot Rod Deluxe, in the reverb recovery section there is a 47uf/100v cap C16 that reads very high on the ESR meter. I have a 50uf/100v cap in stock but its twice the size the C16 and wont fit on the board. I do have a 47uf/50v cap that is the same size as C16. I put my meter on the + side of C16 while play the guitar and at idle and there is no DC voltage there at all.  Can I assume the 50v cap will be OK? Im thinking yes.
chrome-extension://efaidnbmnnnibpcajpcglclefindmkaj/https://el34world.com/charts/Schematics/f

Title: Re: 47uf/50v caps in place of 47uf/100v cap
Post by: punkykatt on March 07, 2025, 03:57:16 pm

https://el34world.com/charts/Schematics/files/Fender/Fender_hotrod_deluxe.pdf

Title: Re: 47uf/50v caps in place of 47uf/100v cap
Post by: Willabe on March 07, 2025, 04:07:27 pm

Are you sure that's not 0.47uF@100v?

I think it is, look at C19 and C20, same thing, 0.47@100v. And their on the same type of chip, same part #.

Title: Re: 47uf/50v caps in place of 47uf/100v cap
Post by: punkykatt on March 07, 2025, 06:05:01 pm

Willabe, you are right, good catch. The C16 cap in this amp is mounted so you can`t read the value. I put the ESR meter on the other 0.47`s they read high also so Im good to go. Thank you very much!!!