jack not returning on high treble

[Pianoman]

The upper notes of any action do not have the added benefit of damper 
springs helping the action to return to the at rest position as quickly or 
with as much gusto as the rest of the action.
James
James Grebe   Piano Tuning & Repair   Member of Master Piano Technicians.
Registered Piano Technician of the Piano Technicians Guild for over 30 
years.   "Member of the Year" in 1989
Creator of Handsome Hardwood Caster Cups, Piano Benches, Writing 
Instruments,Table Timepieces
 (314) 608-4137   1526 Raspberry Lane   Arnold, MO 63010
Researcher of St. Louis Theatre History
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----- Original Message ----- 
From: "Michelle Smith" <michelle at smithpianoservice.com>
To: "'Pianotech List'" <pianotech at ptg.org>
Sent: Tuesday, January 23, 2007 10:09 PM
Subject: jack not returning on high treble


> Hi everyone.  I briefly worked on a drop action piano today (the type with
> capstans and inverted stickers instead of lifter wires and grommets) that
> the jacks would not return after the initial strike.  We see it every day,
> right?  Well, I did a multitude of tests to see if it was a friction 
> issue.
> It wasn't.  I didn't have a lot of time to make adjustments (I was there 
> to
> work on a different piano) but here are two facts to ponder.  First, it 
> was
> ONLY the notes that do not have dampers (the extreme treble).  Second, the
> dip on these notes was slightly less than the rest of the piano, 
> otherwise,
> all measurements were the same.
>
>
>
> Thanks for helping the eternal newbie.  =)
>
>
>
> Michelle Smith
>
> Bastrop, Texas
>
>