Ahh fuck, my amp may be screwed

[Joematthews]

OK, I turned on my laney VH100R today, and left it on standby for a few mins as you do. I then put it off standby and it cut out, then came back on again. Also the volume fluctuated a bit for a minute or 2. Now it's fine but has a really faint rattling sort of noise. I tapped the tubes and none of them are microphonic so I am unsure whether it is a dodgy pre-tube or power tube.

Help anyone?

Joe

 

[Metaltastic]

Tubes don't have to be microphonic to be busted, especially power tubes - swap 'em out and see if it helps!

 

[Joematthews]

Unfortunatly my budget is a sum total of fuck all so I really can't do much untill I am relatively convinced that it will help

I will swap out all the pre tubes 1 at a time to track down a dodgy one (if it is a dodgy one). If that fails I will have to order some new power tubes. The VH100R has an EL34 to 6L6 switch on the back, so can I just wack it on 6L6 and drop some 6L6's in? (it has EL34s atm)

Joe

 

[Metaltastic]

I would assume so, yeah! (though you might wanna RTFM on that one )

 

[Joematthews]

I have RTFM It doesnt really say, it just states that in most cases it should be Ok without a tech. That'll do me so if my tube replacing doesnt work Ill order some 6l6's.

Joe

 

[Sloan]

SEND AMP TO ME I WILL LOOK AT IT PM FOR ADDRESS DO IT.

 

[Joematthews]

hahahaha I live in the uk sloan

Joe

 

[Sloan]

^damn.

 

[Metaltastic]

Hahhaahah, details

 

[greyskull]

if its a bust preamp valve you normally still get some noise,
but if its completley gone, its probably a power valve

 

[Katau]

One thing to try is removing the tubes and cleaning the seats. I've had to do that for my Mesa Rect and 5150 combo. Now they work fine.

 

[Joematthews]

Think I'm sorted now, found a dodgy pre valve and replaced it and it seems to be working. Thanks for the help anyway guys

Joe