Google is your friend :-)
It is Bourns PEC164215FN0024 Vertical Mount.
Mouser:
652-PEC16-4215FN0024
https://syntaur.com/Items.asp?Item=3465
http://www.eprelectronics.com/store/E-mu-Drum-machine-Command-Station-PARTS/E-mu-Command-Stations/Data-Entry-Control-Rotary-encoder-p12.html
Before buying the new one just consider cleaning the old one. It"s
easy and it works, I did it with my Pro2000 and the result is perfect.
You can found info about and videos on the net easily.
Good luck!
Daniel Forro
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On Oct 26, 2016, at 12:16 AM, bezowinz@... [xl7] wrote:
>
> Anyone know where I can find a replacement rotary knob?
>
>
>
> Thanks!
>
Here it's out of stock:
http://www.eprelectronics.com/store/cart.php?m=product_list&pageNumber=2&catID=&c=9&v=&r=&id=&sortBy=undefined&search=&shopByPrice=&viewAll=undefined&customListIds=&venID=
Here they have encoder knob for Proteus MPS:
https://syntaur.com/emu_proteus.html
Is ti the same size? Try to ask them...
Daniel Forro
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On Oct 26, 2016, at 12:44 AM, bezowinz@... [xl7] wrote:
> Thanks, but I probably worded that incorrectly.
>
>
> I need the actual knob used to turn that rotary.
>