[CAUT] caut Digest, Vol 1110, Issue 48

[Douglas Wood]

I often translate this sort of language into "one can usually expect  
consistent complaints if the dip is noticeably less than .390" or  
greater than .420"". Or "we find our time better spent on other  
things if dip is already between .390 and .420".

The "pre-'84" "spec" was .390. Those "New York Improved" parts from  
the mid-80's spec'd at .420 for just a couple of years.

Note that blow is "typically" 1-7/8 for a D, 1-3/4 for the other  
sizes... Plus or minus 1/8 is not unusual. !

I'd recommend much thought and care go into changing original factory  
set-up. It can often be improved, but it is much easier to make  
everything worse by changing only one or two things. And most factory  
set-ups work better than most of the after-market setups that I see.

Doug Wood


On May 22, 2008, at 1:14 PM, Jim Busby wrote:

> Paul,
>
> I got the new S&S manual and it says .400. It also said something  
> that surprised me, although I kind of though this all along;
>
> “It should be noted that the key dip may vary within the suggested  
> range of .390 to .420 inches for any Steinway grand piano…”
>
> Cheers,
> Jim
>
> From: caut-bounces at ptg.org [mailto:caut-bounces at ptg.org] On Behalf  
> Of Paul T Williams
> Sent: Thursday, May 22, 2008 2:00 PM
> To: College and University Technicians
> Subject: Re: [CAUT] caut Digest, Vol 1110, Issue 48
>
>
> Hi Richard,
>
> I think the key-dip on a D should be more like .390".
>
> Try that.
>
> Paul
>
>
> "Richard Adkins" <RADKINS at coe.edu>
> Sent by: caut-bounces at ptg.org
> 05/22/2008 02:52 PM
>
> Please respond to
> College and University Technicians <caut at ptg.org>
>
> To
> <caut at ptg.org>
> cc
>
> Subject
> Re: [CAUT] caut Digest, Vol 1110, Issue 48
>
>
>
>
>
>
> I have a new bag of PU-12W Wurzen "Tapered" Front Rail Punchings I  
> got from Piano Tech. I plan
> to try them on a S&S D this summer. You can tell the correct  
> orientation, as some thoughtful
> person has put a nice black line on the side that goes bottom down.  
> But it is easy to see on the
> bench, which is which.
>
> On this S&S D w/.400" key dip, the jack touches the felt in the  
> jack (fly) window. I'll be checking the entire
> action geometry. Perhaps it could use a shallower dip, but I don't  
> want to compromise there if I don't have
> to. This is a 1940 vintage. Perhaps key dip was shallower?
>
> String height:
>
> Note 62 is post on at 7 5/8"
>
>         36 is 7 3/4 (natural crown?)...I've seen the string height  
> drop dramatically here in winter!
>
>         1-20 are about 8" (from the middle of the string diameter)
>
> These problems have been discussed this past year, giving me the  
> urge to revisit this action
> and try to improve it. I did raise up the rear of the stack some a  
> few years ago, but maybe
> not enough. The distance from the shank to rest felt was way, way  
> to large.
>
> Thanks to the kind souls on this list for publishing Mike Mohr's  
> forefinishing notes.
> Anyhow, I need to do some more head scratchin'....take a lot of  
> measurements again.
>
> I'm hoping the Wurzen felts will help too!
>
> Richard Adkins
> Coe College

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