chip_29508 posts
08-29-2019
8:15pm
To clarify my earlier post, test the preamp without a load. No input cables attached. No output cables attached. See if the sparking stops.
If not, steal a 6922 from the VT100. It has 8. Swap it in for the sparking LS15 tube. See if it fixes the sparking problem. If so, put it back in the VT100 and go tube shopping.
If not, steal a 6922 from the VT100. It has 8.
Bad idea. If the 6922 tube is damaged he will have a bigger headache than he has now. First he will have to buy two new closely matched pairs, and I mean each section of each pair closely matched, 6922 tubes and pay a qualified Tech to re bias the 6922 tubes in that channel of the amp.