Products > Test Equipment
HP 8569B - How to engage or fix Resolution Bandwidth control
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pfm:
I found this in the Service manual parts list. Could this be the RBW rotor ? Has anyone tried sourcing it ? From Agilent Keysight or any surplus contractor ?
AF6LJ:
That is it and you can go to the Keysight website and see if they have any in stock.
There is a search page there you can plug in the part number.
pfm:
! I FIXED IT !
I tried hard but I could not find the spare anywhere. However, by just sheer stroke of luck I found someone selling this stash of rotors on ebay!
Not all were in usable condition but I did manage to salvage a few.
The one thing different about my repair story is that I did not disassemble so extensively. I just unscrewed the small pcb and flipped it on its side and I had full access to the rotor. It was all over in a matter of 2-3 hours.
One interesting thing I did not realize until later is that the resolution bandwidth rotor has only one of those metal hand/fingers while other switch rotors have a set of two.
And yes I did find the missing one lying on the bottom cover.
Its working great now! Anyone want this unit let me know I am going to sell it to make room for something else.

P.S: If anyone wants the rotors let me know I can spare some for your personal use.
AF6LJ:
Good Deal!
:)
NateOcean:

--- Quote from: pfm on March 30, 2018, 03:26:25 pm ---! I FIXED IT !
   ● ● ●
P.S: If anyone wants the rotors let me know I can spare some for your personal use.

--- End quote ---

I could definitely use a single one of the 4-finger metal contact tabs!
(I haven't heard back from the poster (pfm); anyone have an alternate way to message him?  The email icon doesn't seem to work.)
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