HP / Agilent 6645A Power supply question

[bills]

I have a chance to buy one for under $100.00 us. but its broken.
it passes it's self test and the voltage control works.
The shaft for the current control is broken, The control is a hp/optical encoder pn#0960-0912, can these be found?
Is it worth taking a chance on buying this?
I watched the video that dave made on the 6641 (667) and I am wondering if this model can be modified.
any opinions?
thank in advance
bill 

[picburner]

You can easily find the encoder, for example here:
http://www.ebay.com/itm/Agilent-HP-0960-0912-RPG-Rotary-Encoder-/300815927900?hash=item460a06ca5c

[bills]

Yes I can replace that. I think I will buy it.
thanks
bill

[Jwalling]

You can easily find the encoder, for example here:
http://www.ebay.com/itm/Agilent-HP-0960-0912-RPG-Rotary-Encoder-/300815927900?hash=item460a06ca5c

Be careful. Older HP units will NOT work with that encoder! The one in that Ebay link is for newer 65XX 66XX power supplies. I don't know when the change-over was made.

Jay

[picburner]

Jay, you are definitely right.
For a 6645A series 3539A-00561 the right encoder is p/n 0960-0822 that should be Avago HRPG-AS32#59C.
My research was based only on the incorrect p/n 0960-0912.

[rx8pilot]

I love these supplies, hope you can get it. Surely the encoder repair will not be too difficult.

[bills]

No I missed it, logged in 2 min late. It went for $99.99

[Jwalling]

Jay, you are definitely right.
For a 6645A series 3539A-00561 the right encoder is p/n 0960-0822 that should be Avago HRPG-AS32#59C.
My research was based only on the incorrect p/n 0960-0912.

Yup. Those are hard to find as well. Keysight hasn't had any stock for years, and they were always breaking off!

Jay