[CAUT] Yamaha regulation specs

[Jim Busby]

Dale,

Yes, and I have to raise the BR on nearly every P22. That's what I mean with "key travel" and not just "dip". I think it must be the dryness here in Utah. It takes about a year or so for the thing to happen, but hammers start to bobble and dip is about 9mm.

Best,
Jim

From: caut-bounces at ptg.org [mailto:caut-bounces at ptg.org] On Behalf Of Ward & Probst, Inc
Sent: Thursday, February 10, 2011 7:14 AM
To: caut at ptg.org
Subject: Re: [CAUT] Yamaha regulation specs

I've had good success with shimming the balance rail for gross height, then checking and improving level. It's quick and seems to last over time.
DP
Dale Probst, RPT
Registered Piano Technician
Midwestern State University
-----Original Message-----
From: caut-bounces at ptg.org [mailto:caut-bounces at ptg.org] On Behalf Of Jim Busby
Sent: Thursday, February 10, 2011 7:42 AM
To: caut at ptg.org
Subject: Re: [CAUT] Yamaha regulation specs
Dan,

No. You've got it. Nearly 100% of our P22s go through this. Unfortunately the newer ones need such regulation the 1st year! Bobbling hammers caused by shrinking key travel...

Pianists will tolerate a wider range in blow on uprights. A difference of 44-46mm blow doesn't seem to matter on a P22. (Maybe because it's a P22?) I tend to vary blow and keep dip  at 10mm on uprights. And as I said, I rarely sacrifice letoff like I've seen some do.

Best,
Jim

From: caut-bounces at ptg.org [mailto:caut-bounces at ptg.org] On Behalf Of Dan Rembold
Sent: Wednesday, February 09, 2011 7:26 PM
To: caut at ptg.org
Subject: Re: [CAUT] Yamaha regulation specs

Thanks Jim, I thought I might have been missing something obvious.
Dan


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