Good Afternoon,
I converted an old Dentron MLA-2500B to run
a pair of 4CX400A's from Svetlana. (No easy Task!)
Anyway it is working quite well however Exhaust
air temp seems pretty high. I'm reading 65C or
150F. I know these things were hard on Jugs which
is why you can't find 'em anymore. I also know that
with all these little amps the two main drawbacks
are: The air system Sux, and, The air system Sux.
The temps would go higher if I let it, anyone
have an idea as to how high is safe or reasonable?
Spec sheet on the jugs says Max seal and core
temps to 250C, ouch! almost 500F
it just has a 4" Boxer fan blowing into an
Air box with the exhaust being forced out through
the fins of the tubes.
The original conversion article was in Comm.
Quarterly "Summer 1996" by W6KT
http://www.qro-parts.com/images/GS-36B/convert.pdf It's obvious that more air would help but the
goal was to retain the original footprint of the amp.
is there a better boxer fan available or would stacking
a couple be better?
Thanks
/Dan