Steinway [non-adjustable jack] question

[Avery]

Dean,

With the screw adjustable type of wippen, the string thing is only to 
get you in the ball park. IMO. Check each wippen and see how the jack 
lines up with the knuckle core. If you want to be REALLY sure no jack 
escapes prematurely, hold your hand on the hammer and give the key a 
"decent" blow. If the jack escapes, it's set too far forward.

Avery Todd

At 02:10 PM 12/11/2006, you wrote:
>Thanks for the reply, Bob, but I was speaking of adjusting the 
>adjustable types. David was commenting on how crucial it is to get a 
>good adjustment on the jack position for good regulation. I was 
>hoping for a procedure that was more exact than a visual alignment 
>on the section ends, draw a thread across the section, align the 
>rest of the jacks to the thread.
>
><?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" />
>
>Dean
>
>Dean May             cell 812.239.3359
>
>PianoRebuilders.com   812.235.5272
>
><?xml:namespace prefix = st1 ns = 
>"urn:schemas-microsoft-com:office:smarttags" />Terre Haute IN  47802
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>
>
>----------
>From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] 
>On Behalf Of BobDavis88 at aol.com
>Sent: Monday, December 11, 2006 12:57 PM
>To: pianotech at ptg.org
>Subject: Re: Steinway [non-adjustable jack] question
>
>In a message dated 12/11/2006 3:50:02 AM Pacific Standard Time, 
>deanmay at pianorebuilders.com writes:
>Any tips, David? Do you just align visually, or do you use some 
>other standard as well? It has always bothered me that after my 
>visual alignment there sometimes is one that shows up kicking out 
>prematurely. Makes me think there is likely others adjusted too far 
>the other way.
>
>I'm not David, but I'll answer anyway. One old trick is to use 
>toothpick ends inserted into the felt to expand it and cause the 
>jack to be farther out. If it needs to be farther in, someone 
>mentioned ironing or scalpel. I find the scalpel a little hard to 
>protect in my particular tool kit, so I also like the X-acto knife. 
>You can get a scalpel-like blade (which is separable from the handle 
>for storage), and tease it behind a layer of the felt as you pull 
>with tweezers.
>
>The adjustable ones are certainly easier to get a fine adjustment on 
>quickly, and with the action still in the piano - I'm glad they 
>changed. They aren't theoretically perfect, because of the extra 
>mass added to the jack and the uneven compression of the felt, but 
>worth the tradeoff because they encourage more frequent adjustment.
>
>Bob Davis
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