[TenTec] Quieting fan

[Gary Hoffman]

Many tubes are cooled with finned heatsinks, which also double as shields.
I'm sure many of you have seen this done.  For that matter, many tubes have
metal cases.  Any idea if a 572B or similar tube has a metal cased
equivalent ?  Tubes aren't as common as they used to be, back in the day.

Gary

----- 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
> >
> >
> >
> >
> >_______________________________________________
> >TenTec mailing list
> >TenTec at contesting.com
> >http://lists.contesting.com/mailman/listinfo/tentec
>
>
> -- 
> Steve Weber
>
>
> No trees were killed in the sending of this message. However
> a large number of electrons were terribly inconvenienced.
>
> *******************************
>
> Hey spammers - Harvesting email addresses? Don't overlook these guys!
>
> FCC Chairman Michael K. Powell: mpowell at fcc.gov
> FCC Commissioner Kathleen Q. Abernathy: kabernat at fcc.gov
> FCC Commissioner Michael J. Copps: mcopps at fcc.gov
> FCC Commissioner Kevin J. Martin: kjmweb at fcc.gov
> FCC Commissioner Jonathan S. Adelstein: jadelste at fcc.gov
>
> US Postal Service: customer at email.usps.gov
> Fraud Watch: fraudinfo at psinet.com
> Federal Trade Commission: consumerline at ftc.gov
> Federal Trade Commission: uce at ftc.gov
> _______________________________________________
> TenTec mailing list
> TenTec at contesting.com
> http://lists.contesting.com/mailman/listinfo/tentec
>
>