Blowing Fuses. Dennis Had Inspire 300B SET

A Dim Bulb Tester can save you some fuses.

I am in New Jersey if you need assistance.

I found a gut-shot of a recent Inspire 300B amp (Steve Huff).

The rectifier is lower/left.

DeKay

@carlsbad2 I'm not certain how you arrived at this:

Your opinion is noted and considered overly optiomistic at best.  You are a manufacturer and have an overly proud opinion of manufacturers IMHO. 

My prior comment is based on experience. I started my career in 1974 servicing consumer electronics and that is how I put myself through engineering school.

You don't put a fuse of a higher rating in any kind of equipment, especially if that equipment is consistently blowing fuses.

Bad Things tend to happen.

I have no idea how you might have arrived at the 'overly proud opinion' thing. To me the comment makes no sense, so I suspect its not accurate 😉

@atmasphere I've made a pretty good career mysefl, unscrewing the things that OEMs have screwed up. This spring I spent 2 weeks in rural North Carolina helping a vendor figure out how they screwed up a multimillion dollar order.   If I hadn't been there to show them their mistake, they would have sent me $1M worth of identically screwed up product.  

It just makes me shake my head when people post the opinion that the OEM not only knows everything but is the only person that can know about their product.  It is impossible that a lowly private citizen can understand anything about the equipment.

In this case, my observation was that the fuse is at the low end of what is normally used and it is possible that the 2A is blowing because it is on the edge.  If it is indeed a fault, then the 3A will blow just the same.  I did suggest other things to try first.   3A is only 360 watts, nothing is going to blow up.  

You might say that I am increasing the chances of blowing an "expensive" component like an output transformer.  That transformer is probably $200 and I'd much rather replace it than ship the amp back and forth across the country twice.  I would have been reluctant to make this suggstion on an amy using hand wound Japanese transformers.

Absolute statements like "never use a higher rated fuse that is in there" always ring false to a thinking man.  Now "generally that won't solve the problem and could cause something to break" would have been less adversarial.

Finally, I told him that that was what I would do, I let him make his own decision.

We haven't heard badk from the OP.  replacing tubes may have solved the problem.  I would expect it to.  And that's what I suggested first.

Jerry