Guitar Amp Parts For Sale

4Oct/09Off

Vox Ac30

Ac30 won't come on!!!?

I have a Vox Ac30cc2. I let a buddy of mine borrow my ac30 that i got used a few months ago. It is a few years old and probably hasn't been serviced.
He FOOLISHLY left it on in bypass for about.... 5 days.
When he returned to the practice spot, he played on it, flipped it off, and said it wouldn't turn back on. The light doesnt even flicker. He doesn't have any money... so I need to fix it.
Is this a fuse issue? tubes? How do i fix this? I miss my baby.

When you put a tube amp on standby it lowers the heat going to the tubes. I've left my tube amps on standby at least overnight with no issue at all.... for an amp in good service, I wouldn't see an issue.

That said, that's only if it was connected to a speaker. While technically an amp that has been left on bypass shouldn't need to be connected to a speaker load, there is the possibility that if it *wasn't* bypassed and wasn't hooked up to a speaker load for any significant amount of time, it could have placed undue pressure on the tubes and output transformer. No speaker load is very stressful on the output transformer especially.

The advice about checking any fuses is solid. If you turn it on and the tubes don't light up you have an issue with the power supply though, and that is where I would look to find an issue... I'm assuming a tube rectifier, right? So try a new tube rectifier (5au7? is that right? I prefer solid-state rectification anyways). If that *isn't* the issue then I would start looking at the caps and fuses, etc.

I am not very confident in my ability to correctly diagnose and especially repair an issue like this, if it isn't the rectifier that is, so if it isn't the tube I would take it to an *amp tech* (not just a guitar tech!!!) for it to be correctly diagnosed and repaired.

I feel for you very much - its really hard when you lend someone some equipment and they eff it all up. That said, it was probably time for it to be serviced anyways, right? There is very little that cannot be fixed by someone who knows what they are doing, that is the good thing about tube amps... and the AC30 schematics are pretty well-dispersed, so it shouldn't be an issue there.

Its not a bad idea to contact the manufacturer and ask where the nearest licensed amp tech is in your area - that way they'd be working with official Vox parts and already have a working relationship with (and presumably a decent amount of knowledge about) Vox and Vox amps.

There was a guy in my area who was like this - he serviced Mesa Boogie (which was very cool), and one of the most knowledgeable and experienced people I've met (RIP Aviator Guitars, sniff!).

Likewise, though, there is a shop near me where the owner has built his own amps and pedals, and is very knowledgeable about DIY, and I've had him service my equipment before too, and never had any issues there.

I think a large part of it is developing a good relationship with music stores in your area, since they are going to be the ones with local connections and knowledge of who in the area knows their isht, so to speak.

Good luck with your amp!

God, that just blows.....

Saul

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