Thanks for the tips, Paul. There is no doubt the service will be
considerably lighter than its original application and likely I could
get by with less air flow. I'd just like to get it back close to
original if possible. I will be looking for a quieter blower, no
doubt. However, I've been searching for that elusive "quiet blower" for
some time for my 3K Premier and have yet to find it. Most likely I'll
remote the transmitter, so noise won't be too big of an issue. I'd love
to have it right here in the shack so I could watch those beautiful
4-400's glow, but I'll probably have to forfeit that.
Thanks and 73,
Rick/K5IZ
VJB wrote:
Rick,
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
located.
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.
