Members bengerm77 Posted May 19, 2011 Members Share Posted May 19, 2011 I've noticed that my amp has been getting darker and mufflier over the past few weeks. Is this a power tube or preamp tube issue? Is there any chance it could be speakers? I'd really like it if I just had one bad preamp tube, that is somehow making my entire amp run crappy, or if there was one tiny capacitor in the tone stack of the amp that could make all the high end disappear. I would like to avoid taking it to a tech to get it biased correctly with new tubes, but if that's what needs to be done, then so be it. Link to comment Share on other sites More sharing options...
Members Valtiel Posted May 19, 2011 Members Share Posted May 19, 2011 Could be fading preamp tubes, more likely your ears. Link to comment Share on other sites More sharing options...
Members K-Bizzle Posted May 19, 2011 Members Share Posted May 19, 2011 Have you changed anything in your rig recently?Perhaps cables or something like that?Did you start using the FX loop and hadn't before? Link to comment Share on other sites More sharing options...
Members les_paul Posted May 19, 2011 Members Share Posted May 19, 2011 My guess is your strings. Could always be V1. I doubt it is power tubes, depending on when you last retubed it. Contrary to popular belief, power tubes should last for a very long time in a correctly biased amp. Link to comment Share on other sites More sharing options...
Members the_gunslinger Posted May 19, 2011 Members Share Posted May 19, 2011 Strings? Link to comment Share on other sites More sharing options...
Members newholland Posted May 19, 2011 Members Share Posted May 19, 2011 told you you should wear plugs... but you kids never listen... Link to comment Share on other sites More sharing options...
Members bengerm77 Posted May 19, 2011 Author Members Share Posted May 19, 2011 My guess is your strings. Could always be V1. I doubt it is power tubes, depending on when you last retubed it. Contrary to popular belief, power tubes should last for a very long time in a correctly biased amp. I re-power-tubed it about six months ago. However, it's a peavey ultra 120, which I believe is biased very cold. If I had the technical know how I would bias it myself, along with replace some of the caps in the amp as I bet it's approaching 20 years in age. The preamp tubes I put in probably almost 5 years ago. Damn, I've had this thing for a long time. Also, I suspect a few of the pots on the front of the amp may be crackly. Link to comment Share on other sites More sharing options...
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