- Nov 6, 2017
- Reaction score
Just wondering if anyone else is having issues with tubes not lasting as long as they use to? I've got a jcm 2000 dsl 100 watt but before anyone goes down the bias drift road it's got a replacement board which I've tested for any issues & all ok. I did replace bias pots about 2 years ago as one was faulty. I usually replace power tubes yearly as I play a fair bit & today the set that are about 2 months old red plated. 2 tubes on one side. Electro harmonix el34s. I usually bias to 66 mv each side.