Blues Junior - Valve Issue?

[Fretz]

Hey Guys

I have a blues junior...got it about 6 months ago.
I've been using it a bit over the past couple of weeks and tonight I noticed a
weird sound coming from the amp (kind of a soft hum) and when I got closer to
the amp I got a definite burning type smell and a fair bit of heat coming from
the valves. Also one of the valves looks kinda burnt out.

Any ideas on this? Any of you guys experienced this?

[Fretz]

Anybody?
I'd appreciate any help.

[tunghaichuan]

Hey Guys

I have a blues junior...got it about 6 months ago.
I've been using it a bit over the past couple of weeks and tonight I noticed a
weird sound coming from the amp (kind of a soft hum) and when I got closer to
the amp I got a definite burning type smell and a fair bit of heat coming from
the valves. Also one of the valves looks kinda burnt out.

Any ideas on this? Any of you guys experienced this?


Does one of the output valves look burnt? (EL84 in BJ).

It's kind of hard to diagnose these types of problems over the 'Net, but if one of you EL84s has failed, the amp will still produce sound, but you'll get some hum as the output transformer is push pull. When only one tube of the push pull pair is operating, you get kind of a quasi-single-ended operation.

You could check to see if this is the problem by replacing the burnt valve with another, but if something other than the valve was causing the problem, then you risk burning up the new valve.

The best thing to do is take it to a tech and have the amp evaluated.

[Fretz]

Does one of the output valves look burnt? (EL84 in BJ).

It's kind of hard to diagnose these types of problems over the 'Net, but if one of you EL84s has failed, the amp will still produce sound, but you'll get some hum as the output transformer is push pull. When only one tube of the push pull pair is operating, you get kind of a quasi-single-ended operation.

You could check to see if this is the problem by replacing the burnt valve with another, but if something other than the valve was causing the problem, then you risk burning up the new valve.

The best thing to do is take it to a tech and have the amp evaluated.


Thanks a lot for the advice...that's what I'll do.
I hope it'll pull through!! :)