[Jukebox-list] Selenium Rectifier

[Jay Hennigan]

Joshua Tabor wrote:
> Hello Everyone,
> 
> I just finished a fresh rebuild on the TSU7 receiver unit for my Seeburg 
> DS160.  My problem is that the rectifier in the unit is all but dead.  I 
> looked through the archives, but couldn't find any direct answer on 
> replacing the selenium rectifier in this unit.  I also can't find any 
> values for it in my manual, and I didn't want to chance it with a 
> silicon bridge swap.  If anyone has changed these out before, please let 
> me know what you used, and any modifications that were necessary to make 
> it work.  The smoothing rectifier on my mechanism is also starting to 
> test bad, so if anyone has replacement suggestions for it, they would be 
> welcome as well.  Thanks in advance.

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.

--
Jay Hennigan - CCIE #7880 - Network Engineering - jay at impulse.net
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