Hi,
Well it looks like Murphy has struck me hard. I received a few inquiries
regarding the HP 8640b, some requesting
pictures. So I figured I'd show the generator into a frequency counter
and scope. I noticed some erratic readings
on the freq. counter, so I hooked up the scope and saw the amplitude was
erratic as I switched the attenuator. Some
positions showing nothing. By touching the wafer of the attenuator
switch (inside rear) the readings changed. Put
some deoxit on the contacts, rotated the switch, and now.....No Output.
The internal freq. counter shows its oscillating
but still no output. The AM and FM modulators still work.
So, final outcome is....I cannot sell it as working, and don't have the
skills or desire to mess with it.
I DO have the service manual on CD.
Many have asked if the attenuator works, I think so. I say this because
I disconnected the output of the RF assembly BEFORE it goes to the
attenuator, and there is NO OUTPUT from
the RF assembly (yet the internal freq. counter shows RF and changes
appropriately).
I will sell it AS IS with the CD manual, to the highest offer, plus
shipping and packing. Don't forget this is very heavy, and will require
me to double box, etc.
Pick up can be arranged in the Newtown PA or Lawrenceville NJ areas.
I can send pictures to anyone still interested.
Sorry for any false hopes from the original message.
--
73
Larry
WA2DGD
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