---------------------- multipart/alternative attachment In a message dated 5/19/2003 7:31:39 PM Pacific Standard Time, tune4u@earthlink.net writes: > and if so, should I > go for 1 3/4" or 1 7/8"? > > Is there a simple way to decide this, or do I need to completely regulate 3 > or 4 keys before I know it will work? > Alan, Regulating 3-4 samples is good practice on any regulation, and doesn't take but a few minutes. It will show the level of consistency in the action, and will make sure you have workable regulating choices. 1 11/16 to 1 7/8 will work, and even 1 11/16 will give ample power for most players, so the first place to look is a blow that will require a dip of around .390-.420. Another clue can be had from the engagement of the jack and the butt. The leather that the jack pushes on should be approximately perpendicular to the jack, when at rest. That allows the jack to slip back under with a minimum of lost motion. If, on a very slow release of the key, the jack requires more than a tiny bit of lost motion to get back under the butt, either the blow is longer than optimal for those parts, or the hammers are too long. Either will force the butt back too far, creating a "cavity" under the butt that won't let the jack by without too much lost motion. The action will still work, but this is a clue that it is not set up as designed. Too many words, but I'm trying to make sure the description is clear. If the leather is the other way from perpendicular, and the dip is shallow, you are wasting power. Bob Davis ---------------------- multipart/alternative attachment An HTML attachment was scrubbed... URL: https://www.moypiano.com/ptg/pianotech.php/attachments/8d/93/c8/4c/attachment.htm ---------------------- multipart/alternative attachment--
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