Hi Mark,
On Mar 23, 2025, at 11:04 , Mark Vincent via groups.io <orangeglowaudio@...> wrote:
Could the transistors be bad? The 2N5179 replaces ones on this board of the p/n, 151-0282-00. If you have component cooler, use that to briefly spray on the transistors to see if cooling them some makes a difference.
At this point, anything could be bad as far as I'm concerned, including my reasoning to get to the VR as a potential problem. Without extenders, I don't think there's enough room to spray anything inside the VR assembly.
I forgot to mention that two VR modules have the same gain issue, which might point a finger at what's controlling them (the microcomputer).
thanks for the ideas,
Adam
