[Amps] Cooling for GI-7B triodes.

[Tony King - W4ZT]

W4EMF, K4POZ and others frequently put an air box around the tubes to 
insure the air flows fully around the tubes and exits above the coolers. 
  I have more pictures of them at <http://gi7b.gs35b.com>.

73, Tony W4ZT

Steve Thompson wrote:
> 
> robert briggs wrote:
>> 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 think cooling is most effective if air flows along rather than across 
> the fins although transverse cooling seems to work fine in this amp: 
> http://www.nd2x.net/w4emf-MLA.html although there's a note at the end 
> about an air deflector.
> 
> Steve