Vintage Synth Repair

Hello,

I don't know how to test the ua726, other than just popping a new one  
in there and seeing what happens.  Unfortunately, it's a rather  
unusual transistor pair, and normal transistor testing procedures  
don't really apply to it.  It is quite possible that you have a bad  
one, but you should also check out all the components that are in  
front of the 726 first -- things such as opamps, passive components,  
etc.

If you need another ua726, I have new ones for sale.  They are new  
old stock parts from the EML factory in New England.

Best regards,
Michael Bacich
Las Vegas, NV
702-454-0801