[Amps] Fan Noise in GS-35b Amplifiers

Glen Zook gzook at yahoo.com
Thu Feb 20 15:36:56 EST 2014

I have a muffin fan to cool my pair of GI-7bT 160-meter amplifier.  The tubes definitely run cool.  The noise level is relatively low.
Glen, K9STH

Website:  http://k9sth.com

On Thursday, February 20, 2014 12:30 PM, "donroden at hiwaay.net" <donroden at hiwaay.net> wrote:
Quoting Carl <km1h at jeremy.mv.com>:

> Dont overlook a good muffin fan either. The EBM Papst 4600N was used  
> in later production LK-800's using the 3 3CPX800A7's at about 3100V.  
> That is a lot of fin area and back pressure.

I ran a quad of 4cx250b s using a pair of stacked muffins for the  
extra back pressure.  fairly quiet and compact.


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