On Wed, 22 Sep 2004 00:48:27 GMT "Norm Dresner" wrote:

See replies in-line.

"Jim Adney" wrote in message
.. .

I'm sure that with Jim William's help you could do a good job at this,
but the 200CD was really a very nice instrument by the time HP
discontinued it. I think it had a nearly 30 year lifetime, during
which it got many significant upgrades. If you have an early one,
there might be some reason to "rebuild" it, but I suspect that it
would be hard to do better than the late versions. Plus it would take
a lot less time to fix than to repair.

I'm not quite sure what the distinction you're making between "fixing" and
"repairing". Please elaborate.

Oops, sorry, Mind fade. Make that fix vs. "rebuild."

I have some NOS 200CD replacement parts here (caps and light bulbs.)

I think that the first step would be to replace the tubes, wouldn't it?

Not necessarily, but I'll admit that mine needed tubes. It worked fine
on the higher frequencies, but crapped out down low. The longer period
at low frequency operation appeared to be able to completely dissipate
the space charge in the tubes, while they worked just fine up higher.

If you send me your serial number I can tell you how early or late
yours is.

005-28015

1965 That would be a middle era for the 200CD. I think HP sold these
from about '50 or '55 thru '77. Not great, but not bad either. OTOH,
none of them were awful. ;-)

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Jim Adney
Madison, WI 53711 USA
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