Electronics > Repair

HP-8569 Spectrum Analyzer Repairs

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AF6LJ:

--- Quote from: tautech on April 28, 2017, 01:07:43 pm ---
--- Quote from: AF6LJ on March 21, 2017, 03:24:33 pm ---Since the freely available manuals online were garbage, to put it nicely, I want to Artek Manuals http://artekmanuals.com/ and picked up the three volume set for a very reasonable price (under $20.00USD) and received a wonderfully scanned manual set.
These guys are great and the price is so reasonable....

--- End quote ---
Yep you can't beat a hardcopy for a job like this.

Remember you talking about these coming up and don't know how I missed it.  ::)
Following.....

--- End quote ---
I wish I had a hard copy, I bought a good scan of all three manuals, and it is almost as good with the benifit I don't have to figure out where to lay the manual while I work on the thing.

AF6LJ:

--- Quote from: KD0CAC John on April 28, 2017, 01:19:24 pm ---Hay Sue ,
I have 3 of the HP 8640B's and have the stake type sw. also and plan on touching up with a little epoxy to prevent loss .
Thats aside from buying used / supposed working , no output - just another project added to pile .
Nice repair post .

John
KD0CAC

--- End quote ---
My goal is to have two of these 8640s there are good reasons to have two...
Then again, one of my favorite boat anchor HP sig gens.......
And it really is a Boat Anchor is the HP-8660, a real classic in the synthesized signal generator category, and most likely a career keeping one running. :D

KD0CAC John:
Forgot to mention , 2 of the 8460's were parts units , the 3rd was sold a good but no RF output , in the 1st page of testing the meter shows voltage , but once the manual switches to RF AM , FM then there is no meter movement .
Thanks for the link to manuals , was able to find one I need - IFR A7550 , that was also sold as working & is not , so have the manual coming .

AF6LJ:
The resolution bandwidth / frequency span switch issue is fixed, moving on to attaching the knobs and with any luck tomorrow I will have a working spectrum analyzer on my bench....
Then I will move on to the tear down and inspection before power up.

AF6LJ:

--- Quote from: KD0CAC John on April 28, 2017, 07:28:53 pm ---Forgot to mention , 2 of the 8460's were parts units , the 3rd was sold a good but no RF output , in the 1st page of testing the meter shows voltage , but once the manual switches to RF AM , FM then there is no meter movement .
Thanks for the link to manuals , was able to find one I need - IFR A7550 , that was also sold as working & is not , so have the manual coming .

--- End quote ---
I think having an HP-8640 parts mule or two is a good idea.

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