Hi Bob!
Don't forget, you must cooling not only the anodes but also heaters.
I think the best solutions is to using centrifugal blower and chimneys
like in Alpha and others commercial made amps.
Regards, Mike RL3BM
> I am currently constructing another linear amplifier this time using a
> pair of GI-7B(T) triodes.
> Perusing various projects using these tubes I note that most builders
> use an ordinary standard computer fan for a pair of tubes.One of the
> articles states that these tubes run cooler than the old 572B triodes.I
> take it that the anode coolers are able to shed heat more efficiently.
> My intention is to mount the tubes in the horizontal plane.Instead of
> using a typical 240 volt computer fan I am considering using a pair of
> 12 volt fans from old switch mode supplies, placing each blower directly
> beneath each anode so that each tube has a good blast of air instead of
> sharing the flow from one blower.
> I have tested the air flow from a number of these little fans and it is
> quite substantial.
> I have sought opinions from a couple of friends with good home brewing
> skills and they see merit in this proposal.
> I would be interested in wider comment from the Amps community.
> Regards to all.....Bob VK3ZL..
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