Vintage Synth Repair

Looking at the data sheet it is a fairly standard bridge rectifier so an
alternative would be easy to find, just go to your local electronics store
and ask for a 10A bridge rectifier rated 100V or more to screw mount on a
heatsink and they should be able to sort you out (if you can take the
original with you then you can always check the size and mounting are OK).

 

These things cost pennies.

 

Many thanks

 

John Rose

 

(www.astrodevelopments.com)

 

From: vintagesynthrepair@yahoogroups.com
[mailto:vintagesynthrepair@yahoogroups.com] On Behalf Of eidorian_aladan_net
Sent: 24 May 2012 13:15
To: vintagesynthrepair@yahoogroups.com
Subject: [vintagesynthrepair] PPG Wave 2.3 power supply restoration

 

  

My PPG Wave 2.3 passed away recently (while I was playing it - most annoying
:-)

The AC fuse blows unless I have the +5V power supply board disconnected form
the transformer. I have removed it for testing; the large 10,000uF
electrolytic cap looks just fine (no obvious bulging or leaking fluid) but
the bridge rectifier PK10-EDI-8350 has one diode that appears to be
short-circuited (no resistance in either direction on the multimeter) which
I expect is a likely cause of the problem. As the PK10-EDI-8350 is a 30 year
old part that I may not be able to source easily, does anyone see a problem
replacing it with a similar specified, currently available alternative? Any
particular recommendations?

Datasheet is here http://www.edidiodes.com/pdf/Bridges/PK.pdf

Thanks in advance for any advice and assistance.

Cheers,
A.