Question about VOX AC15VR VR Series 15 Watt 1X12 Valve Reactor Combo Guitar Amp Bundle

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Horrific intermittent noise at higher volumes when amp is warmed up. Something overheating? Amp tech says its's not worth fixing. Described something about a "reverter"? Think he meant Reverb - strong european accent...pointing at the digital reverb thingy while he spoke.

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  • thebelfastch May 20, 2011

    Thanks, will do that. It was an electronics expert who looked at it - said it looked fine in all regards, but he didn't actua;;y plug it in to listen- -didn't charge me either so...

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  • VOX Master
  • 5,603 Answers

Look for bad soldering around the volume control pot leads. I think you need a new amp tech that can troubleshoot a problem.

Posted on May 20, 2011

  • thebelfastch May 20, 2011

    Thanks, will have alook at those. It was an electronics expert who looked at it, though he didn't plug it in or anything, didn't charge me anything. Said it all looked good to him, but the Belton reverb module must be faulty. Wonder if its easy to replace?

  • Fred Yearian May 25, 2011

    The reverb is NOT likely to be a separate module. The digital reverbs are fairly reliablle, again any connectors and soldering are usual culprits. The A-D and D-A convertors sometimes fail and get noisy. Those are EASILY diagnosed with circuit cooler spray.

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http://thetubestore.com/12ax7review.html
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Generally speaking, an amp protects itself from heat, shorts, overloads and operator exuberance by refusing to turn on or stay on.

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If it protects immediately on a cool power up you should disconnect the speaker connections and try it 'naked'. If it comes up then diagnose which lead(s) are shorted. If it does not come up the problem is internal and should be left to an experienced and competent hands-on tech for forensics and further action.

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