I recently acquired a sweep tube amp and I got it for nostalgic reasons.
This is my first experience with one of these beasts. It is the
Side Band Engineers matching amp for an SBE-33 which was first phone rig
I bought after I got my general class in 1964.
Anyway, I had to do some work on it before trying to put it on the air.
It uses 6 - 6JE6's. I see that 6LQ6's are often shown as
interchangeable. The amp came with 5 - 6JE6 and 1 - 6LQ6. Are they
really mixable?
The output is very low. With a single tone drive, it loads to 1.2 amp
which is spec and seems to be peak output point too. However, the
output is only about 150W. Is the tube mixture a problem or are all the
tubes just soft or both? I shudder when I see the price of 6 - 6JE6's.
Of course, the manual says to use matched sets which is probably
impossible these days.
David
KW4DH
--
"A democracy cannot exist as a permanent form of government. It can
exist only until the voters discover they can vote themselves largess
out of the public treasury. From that moment on, the majority always
votes for the candidate promising the most benefits from the public
treasury, with the result that democracy always collapses over a loose
fiscal policy, always to be followed by a dictatorship."
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