Mr. Foxen Posted July 12, 2013 Share Posted July 12, 2013 Dying caps can go pop, you'd be looking for swollen ones as an indicator. Quote Link to comment Share on other sites More sharing options...
Anders Posted July 13, 2013 Share Posted July 13, 2013 Or could it be a preamptube or even the new 12ax7 tube? I'm not sure,but i've heard preamp tubes going bad making all sorts of different sounds,also bad cables(especially fried egg-sound).Just a thought. Quote Link to comment Share on other sites More sharing options...
VTypeV4 Posted July 14, 2013 Share Posted July 14, 2013 +1 on giving the bottles a gentle tap.. Any instabilities with the valves themselves will quickly be apparent. Quote Link to comment Share on other sites More sharing options...
Bobo_Grimmer Posted July 14, 2013 Author Share Posted July 14, 2013 Morning, I've given them a dink and nothing noticeable happends. Ive changed all 6 power vavles and put the original 12AX7 back in and biased them. Still the same noise. It varies in volume and stops and starts. It's made a pop sound only once, that caused the service light to flash. Hasn't done that since. I've ran the amp with both cabs, one can and left it on for a hour or so and no change. It's not doing it when sat on stand by. I am headed out to play an open air festival in b'mouth today and I guess we'll see what happends.... I have to say I'm concerned. it's still under warranty so I can see about gwtting it looked at. Thank you for all you help guys. I appreciate it a lot. Quote Link to comment Share on other sites More sharing options...
Mr. Foxen Posted July 14, 2013 Share Posted July 14, 2013 I recall a guy's ampeg doing the same thing and that was toasty caps, bit older though. Quote Link to comment Share on other sites More sharing options...
Bobo_Grimmer Posted July 14, 2013 Author Share Posted July 14, 2013 Hum... well during sound check today it popped. When distorted and the two au7's blew. Off for warranty I guess... Quote Link to comment Share on other sites More sharing options...
Mr. Foxen Posted July 14, 2013 Share Posted July 14, 2013 Should really go as soon as starts misbehaving. Using a malfunctioning amp never goes to good places. Quote Link to comment Share on other sites More sharing options...
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