Quizzes & Puzzles6 mins ago
overheating amplifier
25 Answers
Hi,
Put this here rather than music topic as more a technical problem.
I have a guitar amplifier, which overheats, goes crazy then cuts out. need to switch off, leave for a while and all o.k. again. I have removed the head from the cabionet and run a wire from it to the speaker. its fine like that, plenty of air around it, so no problem. there is only one small vent section on the amp. I was thinking of drilling some holes at the other end of the chassis and fitting a fan of some sort. trouble is, what voltage fan can I install that will run off the amp transformer. I doubt if I will find a 240v fan as small as a computer fan. any ideas?
Put this here rather than music topic as more a technical problem.
I have a guitar amplifier, which overheats, goes crazy then cuts out. need to switch off, leave for a while and all o.k. again. I have removed the head from the cabionet and run a wire from it to the speaker. its fine like that, plenty of air around it, so no problem. there is only one small vent section on the amp. I was thinking of drilling some holes at the other end of the chassis and fitting a fan of some sort. trouble is, what voltage fan can I install that will run off the amp transformer. I doubt if I will find a 240v fan as small as a computer fan. any ideas?
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For more on marking an answer as the "Best Answer", please visit our FAQ.Hi Builder,
No its a spider line 6 mk3 75w all transistor. I can't actually feel anything getting over hot when I touch all the bits after unplugging and removing the chassis from the box, but overheating must be the problem as it works for hours out the cabinet,( has never switched off) but stick it back in the cabinet and ten minutes later off it goes.
No its a spider line 6 mk3 75w all transistor. I can't actually feel anything getting over hot when I touch all the bits after unplugging and removing the chassis from the box, but overheating must be the problem as it works for hours out the cabinet,( has never switched off) but stick it back in the cabinet and ten minutes later off it goes.
ok......... I've never heard of a fan in an amp, but anyway ....... how about this ...... 80mm by 80mm by 25mm
http://www.maplin.co....leeve-thin-fans-30265
http://www.maplin.co....leeve-thin-fans-30265
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They'll normally have a metal back plate that will be bolted to either a heatsink, or just the metal of the case, or just a big metal plate, if it's several years old then oxidisation can occur between them and cause problems, a good clean and remaking the joint with decent thermal paste is a good thing to do every couple of years.
(I'm speaking from more of a RF amp point, but audio amps tend to be the same)
(I'm speaking from more of a RF amp point, but audio amps tend to be the same)
Has it crossed your mind that when you remove it from the cabinet, you are changing two things, not one?
Ok you're increasing ventilation to the amp (although you say it doesn't actually feel hot, anyway), but you're also changing the way in which the speaker is connected. It's possible that the fault is with the internal speaker connection.
Ok you're increasing ventilation to the amp (although you say it doesn't actually feel hot, anyway), but you're also changing the way in which the speaker is connected. It's possible that the fault is with the internal speaker connection.
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Hi All,
now I was told about this thermal paste, that may be the next thing to do. The amp has no dust or anything, it is brand new, but no warranty as the chap I bought it from got it from a music shop that had it back for repair as a new under guarantee non-worker and line 6 replaced it, so it looks, and is, brand new. line 6 want £90 to look at it, I only paid £40 for it so I will try a modification if need be. one of my friends has a similar problem, he takes a floor standing oscillating fan with him and points it into the back of the amp and it works all night in a hot pub/club. my amp has the large heat sink fins sticking out of the back of the chassis, so are visible when all is back together, but they do not appear to be hot at any time.
now I was told about this thermal paste, that may be the next thing to do. The amp has no dust or anything, it is brand new, but no warranty as the chap I bought it from got it from a music shop that had it back for repair as a new under guarantee non-worker and line 6 replaced it, so it looks, and is, brand new. line 6 want £90 to look at it, I only paid £40 for it so I will try a modification if need be. one of my friends has a similar problem, he takes a floor standing oscillating fan with him and points it into the back of the amp and it works all night in a hot pub/club. my amp has the large heat sink fins sticking out of the back of the chassis, so are visible when all is back together, but they do not appear to be hot at any time.
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