[TenTec] Quieting fan

[tongaloa]

Gary Hoffman wrote:

>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
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>
572/t160 cooling is dominated by radiative transfer

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