[Jukebox-list] Selenium Rectifier

[Jim Poe]

When I was working on my AMI G-200, I was going to replace the diodes in 
the power supply with a bridge.  Got it wired up, & realized I had 60 
volts instead of the required 30.  The transformer has center tap that 
is 30V.  Not being that knowledgeable, I went back to 2 diodes as the 
original design.  Is there a way to get the bridge to work in that 
situation, where the transformer has a center tap & each side is 30V? 
Could I only use 1 side of the transformer?

Thanks
Jim

Jay Hennigan wrote:

> Replace CR501 in the TSU7 with a silicon bridge.  I use the MP154 for 
> just about all selenium bridge replacements.  It's way overkill as it is 
> capable of 15 amps at 400 volts, but easy to mount to the chassis.
> 
> http://www.rectron.com/data_sheets/mp1505-1510.pdf
> 
> Mouser has them for under 3 bucks.
> 
> http://www.mouser.com/catalog/629/358.pdf
> 
> Make sure that the line fuse is correct and not overfused.  If the new 
> rectifier should fail shorted you want the fuse to blow rather than have 
> the power transformer damaged.  Some people also place an extra fuse at 
> the transformer secondary, but I generally don't find this necessary.