Tom Rauch wrote:
>While it had chimneys, the blower was MUCH too small for more than about 300
>watts *dissipation per tube* in heavy duty cycle modes.
I agree that the blower is NG. I am going to dig for the large, noisy
blower I've got around here somewhere and perhaps attempt to run it into
a closed box and then out to two dryer vent hoses-one for each
amplifier. Just one more thing in a list of a hundred to do in the next
two weeks.
> A person can not and should always plan on having zero load or
> tuning defects. A "shut loading cap" on a band where it normally is
> about half open is a reasonable test for a compromise between too
> much overkill and too little margin for sensible operators.
I agree that I'm pushing the limits of what I've got, but for now that's
the way it will have to be. The good thing is that in my particular
operation the capacitors on the amplifiers won't get touched for 48
hours after I tune them up.
On another subject, anyone is familiar with the method of cooling that
BTI changed to on the LK-2000 after they stopped using chimneys, wonder
what you think of it? The change was to eliminate the chimney (probably
saved about $25.00 back then) and add a metal tube with a slit in the
top to put cooler air directly to the top of the 3-1000Z. Air was still
pumped into the sealed compartment below and then out around the base of
the tube. They said it was an improvement over the chimney. The reason
I ask is that I am probably the only person in the world who owns three
of these amplifiers - two of them have the revision and one has the
chimney.
BTW, I thoroughly really enjoy reading the mail on this reflector by you
and others who are knowledgeable. I think I am absorbing some stuff
that will help me.
Thanks...Stan
> 73, Tom W8JI
> w8ji@contesting.com
>
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