[ ref: Herb Lindahl's inquiry in MMDigest 140821
 [ http://www.mmdigest.com/Archives/Digests/201408/2014.08.21.04.html 

I acquired the "O" roll frame brand new from Frank Adams in 1982,
originally a PPCo unit.  I had trouble with the speed, such that when
it was first played from "overnight cold", the tempo was fairly fast
at a slower setting.  It took around two tunes to be played before it
warmed up and settled down to the correct potentiometer setting.
I contacted PPCo and they sent me a new potentiometer, but the fault
was still there.

This was not a good situation in that showing my friends for the first
time playing my Orchestrion, the roll would race away!  Later if I knew
that someone was going to visit, I warmed up the unit.  For quite some
time now the speed control works fine when cold.  I guess the 'bugs'
took-off for new 'stomping grounds !

I suggest you change the capacitor which I did not myself at the time.
This could be where the fault lies.

Steve Bentley - SB-"O" Rolls
Vancouver, British Columbia, Canada