Ampeg svt cl fan question

wolfkeller

wolfkeller

Aug 11, 2013
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#1
So, I've grown really tired of the ridiculously loud fan. I use this at home alot but at very low volume and for fairly short periods of time, maybe hr or so.

Would it really overheat if I disconnected the fan when I'm using it like this? If its a problem, how about a quieter aftermarket fan?
 
#2
I guess for potential legal reasons, and I guess because the heavyweights here might yell at me, I can't advise you to do what I did, but mine has been silent for about two years.
 
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#7
The fans were used to reduce the operating temperature of the surrounding components. It's an important part of managing lifespan of the components and in later models, is required to meet 60065 safety standards.
 
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#9
agedhorse said:
The fans were used to reduce the operating temperature of the surrounding components. It's an important part of managing lifespan of the components and in later models, is required to meet 60065 safety standards.
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Is there a reason the fan blows out of the front? It seems like it would cool the tubes better if the fan blew air directly onto the tubes.
 
#10
wolfkeller said:
I understand that. Im thinking, if I'm at hope, low level it shouldn't get too hot.
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The quiescent power (idling, not on standby) dissipation alone may be high enough to require a fan. There's a reason it was included.

JuanB said:
Is there a reason the fan blows out of the front? It seems like it would cool the tubes better if the fan blew air directly onto the tubes.
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Not necessarily. The idea is not to cool the tubes themselves but to manage the temperature of the surrounding circuitry and any places that a user might get burned touching. It's the exchange of hot air for cool air across many areas of the chassis that is important. That's the job of the engineer and testing to determine.
 
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#11
I’m not too sure if it’s correct, but I believe newer Ampegs will shut down if there is a malfunction in the cooling system. I once bought an SVT 1000 solid state head and when it got delivered wouldn’t run even 5 seconds before it just powered down. I sent it back and found out from the seller that the fan had a problem with it and triggered a shutdown.
 
#13
You could also try one of these at low volume, I’m not sure if it’d work with something as powerful as an SVT, but if you keep it low with headphones on it should do the trick. I’ve heard that the SVTs can handle an 8 ohm load, it’s just not advertised; some people with more knowledge can correct me if I’m wrong.

https://www.two-notes.com/en/torpedo-series/torpedo-captor-x/

I learned about it yesterday from a Rhett Shull YouTube video.
 
#14
wolfkeller said:
So, I've grown really tired of the ridiculously loud fan. I use this at home alot but at very low volume and for fairly short periods of time, maybe hr or so.

Would it really overheat if I disconnected the fan when I'm using it like this? If its a problem, how about a quieter aftermarket fan?
Click to expand...

My advice is to listen to agedhorse
 
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#16
PrinceByTor said:
You could also try one of these at low volume, I’m not sure if it’d work with something as powerful as an SVT, but if you keep it low with headphones on it should do the trick. I’ve heard that the SVTs can handle an 8 ohm load, it’s just not advertised; some people with more knowledge can correct me if I’m wrong.

https://www.two-notes.com/en/torpedo-series/torpedo-captor-x/

I learned about it yesterday from a Rhett Shull YouTube video.
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100 watts max. I use mine with 80-100 watts tube heads but wouldn’t take a chance with three times maximum limit.
 
#17
elgranluis said:
Noctua NF-S12A ULN 12V 800RPM 120mm Ultra Low Noise Cooling Fan.

google that , it’s a pc fan , ultra quiet, and it should be the size that you need.
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Except that it's flow rate is nowhere near what's needed... approx. 1 CFM at .44" static pressure isn't going to cut it for this application. Somewhere in the range of 20-40 CFM is going to be in the target. Also, isn't the SVT-CL fan is 80mm and AC?

Just found the specs on the service docs, it's 80mm, 120VAC and 30CFM, therefore according to my information the above Noctua information is wrong.
 
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