On 13 Feb 2004 at 9:37, Mark Beckwith wrote:
> Could you wise old sages help me with simple question - I seem to
> recall hearing that forced air cooling was not the same as, shall we
> say, sucked air cooling. Do I remember right? Seems you could
> destroy your amp if you tried to suck the air through the tube(s) tops
> as opposed to pushing it through from the bottoms.
Old, yes. Wise & sage, not necessarily (I speak of myself.) What's
important is the temperature of the seals. The trouble with anode-to-
filament pin air flow is that the anode cooling air "preheats" the
air flowing across the base seals. It's possible that in some cases,
this would result in too-high temps on the base seals.
But I'll bet a nickel that if you have PLENTY of cooling air flowing,
the seals will stay comfortable no matter what the direction of the
air flow.
73,
George T. Daughters, K6GT
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