Members TimArch Posted October 13, 2020 Members Share Posted October 13, 2020 Howdy folks, I have a 1979 Princeton Reverb. Amp powers up, all tubes appear to be glowing. Zero sound from the speaker...no noise floor, or other hiss. If I turn up the intensity on the vibrato, I can clearly hear the oscillation, but there's no crash from the reverb, if I try to induce such a thing. I've confirmed the speaker works with another amp. There was no 'event' associated with this amp ceasing to function. It was in great working order one day, and now it's not so much. Any ideas? Link to comment Share on other sites More sharing options...
Members happwith12strin Posted October 17, 2020 Members Share Posted October 17, 2020 take to repair shop shock hazard find a cheap wireless unit to avoid shock dont play until repair shop looks at!! mite look at analog amps articlehttps://www.analogbros.com/tech/articles/goodgobad.html dont attemp repairs yourself let a pro do it Link to comment Share on other sites More sharing options...
Members happwith12strin Posted October 17, 2020 Members Share Posted October 17, 2020 also a fire hazard dont plug amp leave unplugged unused till pro repair shop looks at electric guitar both hands ons on steel strings your heart is in the middle fatal electrocution can happen more than one famous musican has been electrocted by a defective amp Link to comment Share on other sites More sharing options...
Moderators daddymack Posted October 17, 2020 Moderators Share Posted October 17, 2020 On 10/13/2020 at 10:20 AM, TimArch said: Howdy folks, I have a 1979 Princeton Reverb. Amp powers up, all tubes appear to be glowing. Zero sound from the speaker...no noise floor, or other hiss. If I turn up the intensity on the vibrato, I can clearly hear the oscillation, but there's no crash from the reverb, if I try to induce such a thing. I've confirmed the speaker works with another amp. There was no 'event' associated with this amp ceasing to function. It was in great working order one day, and now it's not so much. Any ideas? I agree that poking around in there might present a potential hazard, so if you are not well versed in the shock hazards present in tube amps, and if you are not good at these things, take it in to a qualified tech/shop is your best choice. From the description, I will guess your output transformer took a dump. The OT is an easy part to replace...if you are competent and know your way around a tube amp. There are certainly other possible failures that would result in the same outcome, some as simple as a fried resistor or blown capacitor. Considering the age of the amp, not knowing it's service history, and not being able to look at it myself, I can't really go much further. Link to comment Share on other sites More sharing options...
Members onelife Posted October 20, 2020 Members Share Posted October 20, 2020 Any change in the glow of the power tubes when you try to pass signal through the amp? Link to comment Share on other sites More sharing options...
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