Butch wrote:
>Hi folks,
>
>I'm new to this list and quite frankly, not much of a technician. I am also
>the new owner of an AL-80 amplifier - my first tube-type amp. SO....I guess
>I'm asking if one or more of you would be willing to "elmer" me through
>getting this thing up and operating without destroying the tube? If so,
>here's what I've done so far:
>
>1. I didn't know how long since the unit had been run, so I wiped down the
>tube with denatured alcohol to remove any oils, etc. and installed it into
>the socket. I turned it on and the plate voltage is 2700V, which I have been
>told is what it is supposed to be.
>
>2. I let the amp run in stand-by for 8 hours to de-gas the tube.
>
>3. I ran a 220VAC receptacle to the bench and shifted the jumpers in the
>back to allow 220V operation.
>
>4. I re-checked the plate voltage - still 2700V.....must have done that
>right........hi hi.
>
>Now come the questions.................
>
>1. I don't understand the "wrap around" scale on the Band Switch. It reads
>160-80-40-20-15 from left to right, then on the lower scale, it reads
>24-16-10-6.5 in the opposite direction, ending with the 6.5 between 40 and
>80????? There are only detents in the switcn for the upper bands & the lower
>ones are positioned "in-between" the standard positions. If you go to
>www.rigpix.com under POWER AMPLIFIERS, there's a photo of the face of this
>unit if that will help clarify.
>
>I'm sure there will be other questions, but I'll stop here for
>now..........BTW, no, I don't have the manual.
>
>Thanks,
>
>Butch
>
>
>
>
>
Well Butch, I believe those "other" numbers equate to the approximate
frequencies opposite the readings in "meters". As in 6.5 mHz is just
below 40 meters and the 24 mHz is jutst below 10 meters. Or so it looks
to me.
73' Larry
W6LAR
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