half-punching

[Barbara Richmond]

Thanks, Ed!  Umm, I thought the accelerated action had to do with how the
weights were spaced on the key.  Of course, I've been wrong before.

Barbara

----- Original Message ----- 
From: <ed440 at mindspring.com>
To: "Pianotech List" <pianotech at ptg.org>
Sent: Saturday, October 07, 2006 4:53 PM
Subject: Re: half-punching


>
> Barbara-
>
> A quick test on note #1 on a 1960's B action reduced down weight by 3-4
> grams.
> Whatever "acceleration" is produced by the hump would be lost.  Would
> anyone notice?
> Check to make sure other parameters still work, keys still fit in the
> case.
> I think it's something to keep in the bag of tricks.
> A clever supplier could make a set of alternative bearing blocks that gave
> a sharp edge at the center line of the balance rail pins. (Maybe someone
> on this list?)
>
> Ed Sutton
>
>
>>    ----- Original Message ----- 
>>    From: Barbara Richmond
>>    To: Pianotech
>>    Sent: Saturday, October 07, 2006 6:55 PM
>>    Subject: half-punching
>>
>>
>>    Hi all,
>>
>>    Back to using half-punchings.
>>
>>    Has anyone ever tried gluing a thinnest card half punching on the
>> bottom of a Steinway key that already uses the half round balance rail
>> bearings?  Results?
>>
>>    Thanks,
>>
>>    Barbara Richmond, RPT
>>    near Peoria, IL
>