[sdiy] JX-10 volume slider taper

Doug Terrebonne dougt55 at yahoo.com
Wed Apr 6 13:24:57 CEST 2016


The JX-10 volume pot is a dual 50KD. D taper is even more log than an A, see this - 

http://part.freelab.jp/image/VRcave.gif
Doug 
synthparts.com

      From: Rutger Vlek <rutgervlek at gmail.com>
 To: Synth-Diy DIY <synth-diy at dropmix.xs4all.nl> 
 Sent: Wednesday, April 6, 2016 1:04 AM
 Subject: [sdiy] JX-10 volume slider taper
   
Hi guys,

I'm doing repairs on a Roland JX-10 and the service manual is a little short on information on the volume board, which holds the volume slider (as well as those for aftertouch, C1, C2, etc). The volume slider looks original, has a value of 50k, but to my taste the tapering feels strange. There's a big volume effect in the lower region of the travel range, and very little in the high region.

I have no way of telling if the JX-10 was designed this way, if the 50k slider is indeed original, or if it was replaced with a wrong part in a previous repair session.

Does anyone know?

Rutger

ps. I've learned they're originally Panasonic EWAN slide pots, discontinued by now, if anyone knows an appropriate (same footprint) alternative, I'd love to hear as well.
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