Vox VT100 Volume Cutout

epictring

Hi guys, my Vox VT100 (Valvetronix) has recently started giving problems ☹

What happens is when playing the volume would suddenly decrease noticeably at random intervals, and then when turning the amp up to counter it, the volume would come back leaving the amp overly loud. I also noticed the amp is (sometimes) a lot softer than it was - sometimes even not cutting through at band practice.

I'm guessing its a solder on the circuit board or something? I'm clueless when it comes to this. When googling they suggest cleaning the effects loop jacks etc. and I did with no success.

Any idea whats wrong?

I live in Welkom (150k from Bloemfontein) and seriously need to take the amp in for repair, as we gig almost every week now with 2 gigs in a weeks time.
Where can I take it and know the people will know what they're doing?

Thanks for the help! :?

Norman86

Get hold of Mr T on the forum ?
He is part of Tuerk, the distributors of VOX!

StephenG

epictring wrote: Hi guys, my Vox VT100 (Valvetronix) has recently started giving problems ☹

What happens is when playing the volume would suddenly decrease noticeably at random intervals, and then when turning the amp up to counter it, the volume would come back leaving the amp overly loud. I also noticed the amp is (sometimes) a lot softer than it was - sometimes even not cutting through at band practice.

I'm guessing its a solder on the circuit board or something? I'm clueless when it comes to this. When googling they suggest cleaning the effects loop jacks etc. and I did with no success.

Any idea whats wrong?

I live in Welkom (150k from Bloemfontein) and seriously need to take the amp in for repair, as we gig almost every week now with 2 gigs in a weeks time.
Where can I take it and know the people will know what they're doing?

Thanks for the help! :?

unfortunately i also just started experiencing that with my VT100 as well...

do you have any pedals in the chain??

I unplugged all my pedals and with the guitar straight into the amp - everything as fine.

now i know not using pedals is not the answer, but I am wondering whether by having a battery in the pedals, a flat battery could be the cause of this - despite also running the pedals off a transformer..??

I have not tested the theory, as I have not used the pedals again yet - but each pedal in my chain has a battery in it - perhaps, if you can, try the pedals without a battery physically inside them, with the pedals operating just on the transformer power and see if that eliminates the problem??

maybe some pedals are automatically wired to always tap the battery power as long as there is a battery inside the pedal, regardless of the transfomrer being plugged in.??

epictring

Try cleaning all your amp jacks with electrical contact cleaner.

But my amp does it with no pedals :/

Mr-M

epictring PM replied to.

@Stephen G - I was just in your part of the world on Friday. If I had known about your issue, I would have stopped by. I am in CT again the first week of December, perhaps I can stop by then just to make sure your amp is working 100%? PM me.