"Ed" wrote in message
. 192.196...

Can anyone advise where I might find a set of knobs for a dual shaft
control, such as found on HP power supplies that have a course and a fine
adjustment on the same shaft. Typically the outer shaft if 1/4" and the
inner one is 1/8".

Here's a place to start: http://www.rogancorp.com/capabilities.asp?id=80
73 de Glenn AA5PK