|[AMRadio] RCA blower|
wa3vjb at yahoo.com
Sat May 27 06:37:16 EDT 2006
You may not need an original type blower in that BTA,
and the failure of the one you've got is a chance to
cut noise in the room where the transmitter will be
Since you'll be running voice rather than higher duty
cycle music programming, and since transmissions will
be intermittent rather than continuous, I'll bet you
can operate well within temperature margins on those
4-400s by configuring just about any lower flow blower
you have laying around.
Despite the original likelihood all 4 tubes would be
operating under enough load to have their plates
glowing in a broadcast application, RCA didn't even
put chimneys on those 4-400s, probably concluding it
was adequate to rely only on that blower to move lots
of air through the cabinet. Your operating
circumstances are far milder.
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