Sharp key dip/height

[Alan]

The US "standard," or at least most common, sharps height has been 1/2
inch for a very long time. If my math skills serve, that's about 12.7
mm. 

This is a little higher than some of the European & Asian factory specs,
but still a comfortable height for most people to play.

In any event, on American pianos, especially older ones, 1/2" or 13 mm
(rounded) seems like the best and most natural place to start in any
regulation. 12.5 mm might be better but my half-millimeter ruler is
broken.

Alan R. Barnard
Salem, MO

-----Original Message-----
From: pianotech-bounces@ptg.org [mailto:pianotech-bounces@ptg.org] On
Behalf Of Richard Brekne
Sent: Thursday, July 10, 2003 5:30 AM
To: Pianotech
Subject: Re: Sharp key dip/height

14 mm above the white keys at rest is quite the climb upwards. Lots of
techs seem to gawk at 12 mm which usually leaves the depressed black 2
mm
higher then a neighboring white key at rest.

If the specification you ask for exists, then no doubt like all piano
specifications it is viewed as a rather general rule of thumbs.
Personally,
I like at least 0.5 mm, but I dont like to allow the blacks to get more
then 12 mm over the whites when all is a rest.

This range allows for plenty of freedom relative to aftertouch and other
regulation concerns as well

RicB


James Perkins wrote:

> Is there a recommended height above the white keys for black keys when
> they are depressed?  In other words should they be say 14 mm above the
> white keys with a 10mm dip to about 4mm in the down position?  Or is
it
> 'piano specific'?
>
> I would appreciate your comments.
>
> James Perkins
> 42 Marlee Road
> Parklands
> WA 6210
> Australia
>
> 08 9581 6354
> Mobile 0401674447
>
> _______________________________________________
> pianotech list info: https://www.moypiano.com/resources/#archives

--
Richard Brekne
RPT, N.P.T.F.
UiB, Bergen, Norway
mailto:rbrekne@broadpark.no
http://home.broadpark.no/~rbrekne/ricmain.html
http://www.hf.uib.no/grieg/personer/cv_RB.html


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