Tube Amp Archive

I'm not sure. In 2 cases, they were JTM45 PT's, and the replacements were a bit bigger (thicker stack), so clearly there was some design or manufacturing issue. Nik's service in replacing them was excellent (under 48 hours) and I suppose you have to say that he has sold an awful lot of amps, with li...

Yes, you'll need the bigger fuse. I've recently built a 50W HRM, but with a 100W mains Tranny, and had to fit a bigger fuse to handle the bigger inrush current.

I've had 3 PT failures on Ceriatone amps over the last few years.