Mark I reissue fuzzy, cutting in and out?

[Sean Perkins]

I checked the cables and two guitars, same problem. The sound will get fuzzy or just cut in and out. But then also sound fine at times. No apparent rhyme or reason to it. What might be going on?
thanks

 

[electric mayhem]

Could be a number of things but a good start is to clean and tighten the tube socket pins.

 

[mark1406]

I checked the cables and two guitars, same problem. The sound will get fuzzy or just cut in and out. But then also sound fine at times. No apparent rhyme or reason to it. What might be going on?
thanks

I assume the sound getting fuzzy and then cutting out could be the rails to part of the power supply failing. Hard to know without opening the amp up.

Regards

Mark