Dear Fryette/VHT friends,

I'm referring to my problem I've described here 3 weeks ago in this forum.

After investigation by professional technician and tube guru it seems that some switching relay(s) might be faulty inside my GP3 unit. According to my technician it would really help a lot to have schematics of GP3 preamp allowing him to trace the signal and identify the malfunctioning relay.

So hereby I would like to kindly ask you. Does anyone here have schematics of GP3, or at least the switching (logic) part of it?