I almost ordered some low microphonic preamp tubes

[primeholy]

But I went and messed with my amp without plugging my guitar in. I was getting squeals on channel 3 at practice with no signal going to the amp. Plugged my cab back in and turned the amp on with the same settings at practice and same squeal. I was in mark iv mode, but when I switched to extreme the squeal would go away. I could turn my gain down to about noon and it would go away also, but I luvs me some gain! If I turned the mids way down it would go away too. I finally discovered I had it on bright, and if I switch it to normal, I could crank the gain without the squeals. Now gotta wait to Tuesday to make good adjustments cause my gigging cab is at our practice space.
Carry on!

 

[SteveO]

It sounds like one of your preamp tubes is a bit microphonic anyway, you might want to grab a spare one for the inevitable moment when things get really bad.

 

[primeholy]

It sounds like one of your preamp tubes is a bit microphonic anyway, you might want to grab a spare one for the inevitable moment when things get really bad.

Done. They were still in my cart at dougstubes!

 

[primeholy]

Ok. I ordered two of them. What slots should I put them in if I was having the trouble on channel 3?