Most amps today use convection cooling. To me, radiation cooling would
imply no airflow used and that isn't seen very often.
73, K8AC
----- Original Message -----
From: "David C. Hallam" <dhallam@rapidsys.com>
To: "Amps@Contesting. Com" <amps@contesting.com>; "Bill Turner"
<dezrat1242@ispwest.com>
Sent: Thursday, November 03, 2005 10:49 AM
Subject: Re: [Amps] Meaning of "conduction cooled"
> The term conduction cooled refers to a series of metal ceramic tubes that
> were cooled by contact with a metal heat sink though a BeO ceramic block
> in
> a manner analogous to the way solid state devices are cooled on a heat
> sink.
>
> Radiation cooling is used ham amplifiers. Many a pair 4-400A's were/are
> radiation cooled.
>
> 73
> David
> KC2JD
>
> -----Original Message-----
> From: amps-bounces@contesting.com [mailto:amps-bounces@contesting.com]On
> Behalf Of Bill Turner
> Sent: Thursday, November 03, 2005 10:33 AM
> To: amps@contesting.com
> Subject: [Amps] Meaning of "conduction cooled"
>
>
> I notice that some posters are using the term "conduction cooled"
> lately and I'm curious what they mean by it. Aren't all amplifiers
> "conduction cooled" one way or another? Heat is conducted away by
> some means, whether directly by air or liquid or indirectly to a heat
> sink which is in turn cooled by air or liquid.
>
> I'm aware of "radiation cooling" too, but I doubt many high power
> amplifiers use that.
>
> Some clarification would be appreciated.
>
> 73, Bill W6WRT
>
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