https://guitarnoise.forum/live-sound/hybrid-amp-volume-fades-in-and-out/ Guitar Noise Discussion Board en-US Thu, 04 Jun 2026 12:47:51 +0000 wpForo 60 https://guitarnoise.forum/live-sound/hybrid-amp-volume-fades-in-and-out/#post-348710 Tue, 02 Mar 2010 05:31:07 +0000 Live Sound tinsmith https://guitarnoise.forum/live-sound/hybrid-amp-volume-fades-in-and-out/#post-348710 https://guitarnoise.forum/live-sound/hybrid-amp-volume-fades-in-and-out/#post-348628 Mon, 01 Mar 2010 02:57:05 +0000
The next thing could be the volume control or pot itself. All suggestions welcome - I'll research the specific amp.

Sometimes this can be resolved with a contact cleaner spray, but as you know, not the first thing I'd have considered.

There is a rarity too that I've found in tube amps, when a biasing resistor fades or fails, but it has been a long shot usually.

This is all I could find on a T30R, and somebody on an amp forum complained about a Power Supply failure or complete meltdown. No need for that particular link. So, this is minimal. http://www.buzzillions.com/reviews/guitar-research-t30r-combo-amp-reviews

But if that was the case with yours, your power-on light would fade or fail too, giving a clear sign of no power getting by.



I'm back to edit - I know you're not simple, but try a different guitar cord. Patronize us, please, just trying to help. 8)


Good luck!]]> Live Sound Blue Jay https://guitarnoise.forum/live-sound/hybrid-amp-volume-fades-in-and-out/#post-348628 https://guitarnoise.forum/live-sound/hybrid-amp-volume-fades-in-and-out/#post-348618 Mon, 01 Mar 2010 00:22:26 +0000 Live Sound danielle122 https://guitarnoise.forum/live-sound/hybrid-amp-volume-fades-in-and-out/#post-348618 https://guitarnoise.forum/live-sound/hybrid-amp-volume-fades-in-and-out/#post-348595 Sun, 28 Feb 2010 19:22:36 +0000 Live Sound danielle122 https://guitarnoise.forum/live-sound/hybrid-amp-volume-fades-in-and-out/#post-348595 https://guitarnoise.forum/live-sound/hybrid-amp-volume-fades-in-and-out/#post-348586 Sun, 28 Feb 2010 18:06:07 +0000
Danielle, your presumption about the preamp tube is one possibility or likelihood.

I think it is particularly valid, because you describe a 'soft' or gradual failure, and not complete 'power out'.

It is also the type of intermittency that applies to glass & cathode tubes, and not to other fuses or circuitry, IMO. :idea:]]> Live Sound Blue Jay https://guitarnoise.forum/live-sound/hybrid-amp-volume-fades-in-and-out/#post-348586 https://guitarnoise.forum/live-sound/hybrid-amp-volume-fades-in-and-out/#post-38572 Sun, 28 Feb 2010 16:36:15 +0000 thank you]]> Live Sound danielle122 https://guitarnoise.forum/live-sound/hybrid-amp-volume-fades-in-and-out/#post-38572