[pianotech] Bass Key Slap

[Ryan Sowers]

There should be a narrow cardboard shim on the bottom of the cheekblock.
With some care you can use a razor blade or sharp knife to remove some
layers from the cardboard. This will give you more downpressure on the
keyframe. pin, if that turns out to be the problem.

Ry

On Tue, Mar 29, 2011 at 11:53 PM, David Nereson <da88ve at gmail.com> wrote:

>   Or the left (bass) keyblock screw isn't tight, or the keyframe guide pin
> hold-down is loose or isn't really holding down the left end of the
> keyframe, thus allowing the end of the keyframe to sit above the keybed a
> tiny bit, and slapping against it when playing the lowest keys.  Also check
> the damper upstop rail and the keystop rail for loose screws.
>   --David Nereson, RPT
>
>
> ----- Original Message ----- From: "Don Mannino" <donmannino at ca.rr.com>
> To: <pianotech at ptg.org>
> Sent: Tuesday, March 29, 2011 5:28 PM
> Subject: Re: [pianotech] Bass Key Slap
>
>
>  My first thought is the keyframe needs bedding.
>>
>> Don Mannino
>>
>> -----Original Message-----
>> From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On
>> Behalf
>> Of Arlie Rauch
>> Sent: Tuesday, March 29, 2011 4:27 PM
>> To: pianotech at ptg.org
>> Subject: [pianotech] Bass Key Slap
>>
>> I was tuning a customer's Steinway today, and she wanted me to look also
>> at
>> her Schimmel grand.  She heard noises, in the key she thought, in the
>> lowest
>> notes.  I couldn't hear it at first, but then I did when thumping the
>> lowest
>> 8 or so notes--it sounded like a slap when the bottom of the key contacted
>> the front rail felt.  First I thought maybe the front rail felt is too
>> hard,
>> but on my hour-drive home, I thought maybe the cause is elsewhere.  Why
>> can
>> you hear that on the lowest bass notes, but when you play up higher the
>> sound is gone?  Maybe something is loose at the bass end in the action or
>> the keybed.  Any suggestions?  I hope to remedy this sometime when I go
>> back.
>>
>> Arlie Rauch
>> Glendive, MT
>>
>>
>>
>


-- 
Ryan Sowers, RPT
Puget Sound Chapter
Olympia, WA
www.pianova.net
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