[Amps] Sweep Tube Amp

[David C. Hallam]

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
-- 

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