#1
The faceplate on my vintage amp gets REALLY, REALLY hot when it's been turned on for more than 30 minutes. There's a row of 7 tubes in there.

The back side of my amp has an open port where the tubes are, and I was thinking about getting some small fans and aiming them at the cutout to keep the temperature down. Would this be a good idea? Will it add any life to the tubes or chassis? Could it introduce noise into the circuit?

If you were doing this, what kind of small fans would you use?
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#2
Don't. Tubes are meant to get hot.
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#3
My Classic 50 has a small computer fan inside the chassis. It's a standard feature on the amp, but apparently not many amps have them. I'd say it's the primary source of noise in the amp, but it's not very noisy to begin with so I don't mind. As far as I know it will extend the life of the tubes. Regardless, it's worth a shot. I like not burning myself when I'm trying to adjust knobs

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#4
Quote by JoePerry4life
Don't. Tubes are meant to get hot.


I agree about the tubes, but what about the chassis and faceplate? My amp is minty & I'm concerned about how hot these metal components get when I leave the amp on for 20-30 minutes (or more).

Not hot enough to get burned, but still damn hot.

BY THE WAY: If I did this, the fans would be small computer type fans and on their own clean circuit...or maybe battery operated. So any "noise" would be of the ambient variety.
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Last edited by Armchair Bronco at Sep 28, 2009,
#5
I believe Weber makes a small fan for amps. You have to wire it in to the circuit for power. It's a relatively simple procedure though. My advice is make sure you don't have it pointed directly at the tubes. You want to create a path that makes it flow over it so that it doesn't get the tubes too cold. If you point it right at them, there's a strong possibility they would crack because of the heat/cool cycle strains.
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#6
Quote by mmolteratx
I believe Weber makes a small fan for amps. You have to wire it in to the circuit for power. It's a relatively simple procedure though. My advice is make sure you don't have it pointed directly at the tubes. You want to create a path that makes it flow over it so that it doesn't get the tubes too cold. If you point it right at them, there's a strong possibility they would crack because of the heat/cool cycle strains.



nice thinking
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#7
My Dr. Z Maz 38 came with a fan in the back, but it's not pointing right at the tubes. It seems to be blowing more so right on the transformer than anything else. If anything it will extend the life of your power transformer. The fan itself is very quiet and I cant hear it even when im not playing. Its easily unpluggable, but having it there makes me less worried about any sudden amp breakdown at shows
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#8
Quote by GuitarUser
nice thinking




I can't take credit for it though. I e-mailed Ted Weber about a year ago with some questions and a fan was one of them. He was a great guy.
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#9
I do it with a normal fan
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#10
^Ya I just point a fan towards the back of the amp, and at me... I get hot when I play for 30 minutes too.
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#11
My Mesa/Boogie has a built-in heatsink fan that circulates the air in the combo around the tubes to keep them cool. I don't think a small fan inside a combo, such as what comes in a computer case, is a bad idea.
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#12
I would not worry about it too much. I have my amp on for 2 or 3 hours at a time and it is just fine.