Tube Amp Archive

Thanks Gary, i will replace the clean / overdrive 12AX7 tubes to see if the feedback comes again at the same gain level or not... I made a main preamp PCB with clean/overdrive stages and all the wirings coming and outcoming are shielded... The only thing i changed in this V2 was to use pretty goods ...

Hello, I've got a feetback problem when i use the overdrive channel + boost circuit, when the drive level is greater than middle gain, and when the bright selector is ON. it's like a high larsen.. any idea about this ? ps : i put the 22k input resistor near the first 12AX7 triode ... anything to do ...