Amp power peak when turning on? Ampeg B2 Question.

I would take it to a repair shop it's obviously consuming far more power than it should.X

 

Fuses? Really. Where are you playing that they don't have breakers. I haven't seen an actual fuse in a building in decades and decades. Even the hundred year old farmhouse we lived in in PA had breakers. Am I reading your OP wrong?

 

I suspect he meant circuit breakers as it's rare to see a fuse "jump out",...although, I've seen them explode!

 

That's what I was thinking too, but wanted to make sure.

 

This ^^^^^ I've been fooling with amps since 1965 and have never had this happen.

 

Good call! This is the type of problem best addressed by a qualified tech, and sooner rather than later.

OBTW no apology needed, your English is clearly better than my skills with a second language.

 

Has anybody modified this amp; Bigger filter capacitors perhaps? Where are you located, and what is the line voltage and current rating on the circuit breaker?

 

Actually, it can happen.

There are circuit breakers that look like fuses with a small pin that comes out of the center. These are used to retrofit breakers into fuse panels. The kind of thing that you find in some old venues. When it trips, the switch pops outward. To reset it, you push the pin back in.

 

I saw something like that once in an old country/farm house.

 

I had them in my first house, 1926, in Canada. they worked well and lasted until i completely rewired the entire house.

 

AFAIK, there isn't any preamp tubes in the B2 model

 

Correct. They are purely SS. I had one until about 3 years ago. Good amp.

 

Jacobus,

This can be fixed quite easily. Your B2 is probably an amp made before 1998.
The B2 has an toroidal transformer which has an high peak current when switched on.
I recently bought an B2 combo with the same issue.
I added a NTC before the power on switch, after that no more problems.

Ampeg did a modification in 1998 by adding a NTC.
I will post some pictures, schematics later.