[CAUT] Original SD-10 Key Height

[Ed Sutton]

Bob-

Check the front rail pins. Are they very low in the front key mortises?

Ed S.

----- Original Message ----- 
From: "Bob Hull" <hullfam5 at yahoo.com>
To: <caut at ptg.org>
Sent: Tuesday, July 07, 2009 1:30 AM
Subject: Re: [CAUT] Original SD-10 Key Height


>
> So far, without getting some serious investigative time in this, it seems 
> like trying to lower the key ht. complicates everything else.  My 
> assistant has been doing the work and I've not spent any serious time on 
> it.  We have thought about replacing the key pins if there are any longer 
> ones.  Some of them are actually below the top of the key. thanks for your 
> thoughts and the others who've chimed in.
>
> Bob
>
>
> ----- Original Message ----
> From: Fred Sturm <fssturm at unm.edu>
> To: caut at ptg.org
> Sent: Monday, July 6, 2009 10:20:32 PM
> Subject: Re: [CAUT] Original SD-10 Key Height
>
> Back to this original question, and the reason for wanting to know the 
> original spec: balance pins too low in the mortises. I assume the tops are 
> not (or not all) protruding? I guess my own response would be to address 
> the pins, not fool around with adjusting everything around where they 
> happen to be. Lowering key height enough to make the tops of the pins 
> protrude seems like a heck of a lot of lowering. What does that do to 
> other issues, like having enough dip, relationship of keytops with 
> fallboard, actually having punchings under the balance holes to be able to 
> level the keys?
>    In any case, why not just raise the pins a bit (pry or drive them up a 
> couple mm)? Maybe somebody pounded them down for some reason. Or replace 
> with longer ones if that is necessary. Or if "almost buried" just means 
> borderline, the curved part is just over the tops of the bushings, leave 
> well enough alone.
> Regards,
> Fred Sturm
> University of New Mexico
> fssturm at unm.edu
>
>
>
> On Jul 4, 2009, at 12:56 PM, Bob Hull wrote:
>
>>
>> Rebuilding the action of an SD 10 and it appears that someone has already 
>> been monkeying with this one.  The balance rail pins are almost buried in 
>> the mortise.  The key ht. on the old action is 2 3/4" to the underside of 
>> the keytop.   Does someone know what the original specs were?   The piano 
>> action handbook says 2 9/16" for Baldwin concert grand but I didn't know 
>> if the SD10 would be different than a generic older  Baldwin concert 
>> grand.
>>
>> Also, original specs for hammer blow and dip if you know.  I'll make my 
>> adjustments from there.
>>
>>
>> Thanks.
>>
>> Bob
>>
>>
>>
>
>
>