Ampeg SVT-4Pro problems/questions

[Randy Warren]

Jerrold, do you happen to know what the part is for the big bridge rectifier? needs replacing as one side is giving out +80 and the other is -53v, the part number on the side does not come up on Mouser or digikey, thanks!

 

[Jerrold Tiers]

The 21-207-01 is just a 25A rectifier, IIRC 400V, with leads out at one side only.

Might be difficult to locate. be sure you need it first, and don't have just a bad solder joint. They are good for that.. Then try at LS Electronics for the exact part, LS bought a lot of NOS stuff from Loud Technologies. Carlos ("Dave") Bedoya is the owner, and designed some of the Ampeg product while at SLM.

http://www.lselectronics.net/

otherwise, you could use any regular wire lead type and simply wire down to the board. Might be more reliable.

 

[Randy Warren]

Thanks, Jerrold, much appreciated! I'll get a new one in and work from there...

 

[Randy Warren]

Jerrold, I got a 2508 package, its about a quarter of the thickness of the KBPC2504S package, unfortunately, the leads are reversed, I can mount upside down and bring the leads from the top to the board, but I am somewhat concerned with the package thickness, it so much smaller than the original, do you think that could be a problem regarding power dissipation? would I be better off trying to wire in the leadless GBPC, which is much thicker, like the KBPC? thanks!