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Old 19th September 2011, 10:12 AM   #1
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Join Date: Feb 2004
Location: manchester
Default Self load invariant supply voltage

Hi

I recently built a douglas self invariant amp for a friend using a couple of pcb s from the signal transfer company. Very high quality boards and excellent service btw.
Had it running of a bench supply for testing now have it running off a large toroid and simple rectified supply with x2 22000uf caps (stuff I had lying about). My issue is the supply is just a little hot for the design - self recommends a maximum of +-45V , but my supply is 48.5V. Im wondering if there is a nifty/simple way to drop the rails to 45V or lower without affecting performance? It also doesnt seem to sound quite as good with the higher rails (I had it running of 30V before), maybe its distortion performance is affected. It has some serious clout though !

Thanks
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