Hello, new to the DIY Audio site. I recently acquired a Threshold S-300 Mk II with the factory installed "e" updates including balanced inputs. The previous owner had no knowledge regarding the history of the amp so I contacted Threshold to see if there was any record of when updates were done. They indicated it would have been over 20 years ago since that's how far back their records go and they recommended replacing the PS caps and bridge rectifier. I can do that myself but I would like advice on what bridge rectifier would be best. I've searched through other post and came across two different parts that were used, a KBPC3504 or a IXYS HexFRED. Any opinions on which would be best or best suited? Thanks
I agree - the KBPC (or any other part with similar ratings) will work just fine, no need to waste money. If you do wind up looking at other BRs keep with the 35A RMS rating - that is way over spec'd for what is needed for normal usage but will give you a good bit of cushion with the amp's extended start up surge current.
Hal
Hal
When my S/500 was stock, I used this:
https://www.mouser.com/ProductDetail/GeneSiC-Semiconductor/KBPC3504T?qs=3vb5YHheJT20pkWXbAS3mw==
Which is what you spec'd out already... However, I would take Mr. Soderberg's suggestion and use a IXYS. I had great luck with adding a snubber circuit to mine but that is more involved.
https://www.mouser.com/ProductDetail/GeneSiC-Semiconductor/KBPC3504T?qs=3vb5YHheJT20pkWXbAS3mw==
Which is what you spec'd out already... However, I would take Mr. Soderberg's suggestion and use a IXYS. I had great luck with adding a snubber circuit to mine but that is more involved.