Help needed with an NVA A60 power amp please!
Hi
I recently aquired a faulty NVA A60 (early version) Power amp that had two faulty transistors on one channel and also a few burned out resistors so I decided to replace all of the transistors for both channels and the burned resistors and when I finally got round to powering it up with the pre amp that came with it the sound was fantastic for around 15 minutes and then as it warmed up I started to hear distortion in one channel but this was the channel that was not faulty originally.
I immediately shut it down and have not done anything with it since.
I have been informed that NVA use a resistor to set the bias but was wondering if anyone knows which one or how I can go about biasing the amp as I loved the sound so much and think it's well worth fixing.
I have tried contacting NVA directly via email but had no reply as of yet.
I would really appreciate any advice and guidance on this if possible.
Many thanks!
