On 12/22/2012 12:09 AM, Merchison Burke wrote:
If I recall correctly, I believe that the sliding portion of the
attenuator can be removed from the fixed portion to effect repairs on
the resistors and capacitor but it is ringed with spring fingers (to
provide grounding) and they must be carefully squeezed together in order
to insert the sliding portion back into the fixed portion. You may have
to use a piece of paper wrapped around the finger to squeeze them
together. I would not suggest using anything sticky, like tape to
squeeze and hold the fingers together. That would cause another problem.
Merchison in Toronto
On 2012-12-21 1:22 PM, Max Robinson wrote:
The sliding part of the attenuator has a couple of 53 ohm resistors
and a
variable capacitor in it. It may or may not be possible to get the thing
apart to replace them. In any case it would be a lot of work.
Regards.
Max. K 4 O DS.
Email: max@... <mailto:max%40maxsmusicplace.com>
Wonder if anyone here can post a schematic of the attenuator on some
accessible site. (I wonder, for instance, about "53" ohm resistors, since
that is not a standard value, and about the value of the capacitor and
what it is
used for, unless it's just a coupling cap to the output.) I might just
take a look
and see how complicated it might be to fix the thing.
The spring-finger stock doesn't surprise me, and it might very well take
more
than paper to squeeze the fingers back down to go into the tube--I'm
thinking
maybe .010" brass strip or similar--maybe a strip of aluminum cut from a
beer can might work.
Whoever named it a boat-anchor was right on--the whole line of HP generators
from that era fit the description--particularly the upper
microwave-range ones.
Was it the 620 that weighed about 100 pounds?
--doug
