Vintage Synth Repair

use a slightly bigger one; they are known to be a underrated in the ppg waves

had kind of a similar problem with mine and replaced it with a 15A (though i had to drill a new mounting hole)

cheers

kris

From: Adrian Corston
To: vintagesynthrepair@yahoogroups.com
Sent: Friday, May 25, 2012 1:56 AM
Subject: Re: [vintagesynthrepair] PPG Wave 2.3 power supply restoration

Thank you John & Colin, I will let you know how it goes!

Cheers,
A.


On 05/24/2012 10:23 PM, John Rose wrote:

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.