[TenTec] Quieting fan

[Dave Edwards]

Steve... My 1KW Heathkit SB230 from ...I guess the early '80s uses a heat
sink cooled tube.
A single 8873, it uses no fan...just a heat sink on the back and does an
easy 600 watts out.
Totally quiet!!
...Dave
----- Original Message ----- 
From: "Steve Weber" <kd9bo at mac.com>
To: <tentec at contesting.com>
Sent: Monday, January 19, 2004 8:17 PM
Subject: Re: [TenTec] Quieting fan


> Dear fellow cult-of-the-cosmic-orange-dot members,
>
> Would it be possible to surround the tube with a finned heat sink
> similar to those used on some transistors?  What about ducting that
> discharges by the tubes or even surrounds the tubes?  Having never
> seen the inside of this amp, I may be simply blowing hot air.  (ouch)
>
> KD9BO Steve
>
> >Hi Gary,
> >
> >The original post was in regards to an amplifier which uses a pair
> >(maybe 4) 572B triodes. These are glass envelope tubes. While it may
> >be possible to precool the air using a chilled water system, there
> >would still be a need for a fan to blow the air across the tube
> >envelopes. Perhaps the air flow rate could be reduced and the fan
> >could be quieter using cooler air.
> >
> >There are water cooled tubes and conduction cooled tubes, which
> >could reasonably incorporate a liquid heat transfer media. In the
> >case of glass envelope tubes I really see no reasonable way that
> >water cooling could be applied.
> >
> >DE N6KB
> >
> >
> >
> >
> >_______________________________________________
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> >TenTec at contesting.com
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>
>
> -- 
> Steve Weber
>
>
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>
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