The jack spring was too long or mispositioned, preventing the jack from fully returning, despite the regulating button. Jerry Cohen New Jersey --- Alan <tune4u@earthlink.net> wrote: > Yes, but how? Turning the regulating screw > accomplished nothing. > > Alan R. Barnard > Salem, MO > > > -----Original Message----- > From: pianotech-bounces@ptg.org > [mailto:pianotech-bounces@ptg.org] On > Behalf Of Avery Todd > Sent: Tuesday, July 15, 2003 8:38 PM > To: Pianotech > Subject: Re: Diagnose This! (A puzzler) > > > Correct the position of the jack under the > knuckle???? > > Avery > > At 08:32 PM 07/15/03 -0500, you wrote: > > >Piano: Late model Geo. Steck small grand. > > > > > > > >The Problem: G#3 failing to play on a hard blow. > > > > > > > >Observations: Plays with perfect reliability on > soft blows but misses > >almost every time on hard blows (jumps up a little > but no where near > the > >string). > > > > > > > >Possible causes eliminated: > > > > > > > >1. Key stick is NOT cracked or broken > > > >2. “Catcher Interference” ruled out by the > umpire—hammer tail is > NOT > >snaggin’ or draggin’ on the buckskin. > > > >3. Hammer, shank, and knuckle are fine. > Observed, from marks on > the > >knuckle, that it was only resting on one side of > the rep lever. Hammer > >not > >centered well on strings either. Adjusted the > lateral position of both > >hammer and rep lever to better align everything. > Had no effect on the > >problem. (Before you squawk, the piano is pretty > new; the hammers > >virtually grooveless*.) > > > >4. Examined whippen assy. No problem with > flanges or centers. No > >cracked or broken parts. Nothing missing. Nothing > unhooked or out of > >its > >slot, etc. All in like new condition. > > > > > > > >Clues: > > > > > > * Let off was early (maybe 3/8”) and turning > the adjusting dowel > > didn’t seem to change the letoff point. Hmmm … > > * Jack height was good but jack was too far > forward. Aha! Jack > isn’t > > getting fully under the knuckle and is tripping > out so fast on a hard > > blow that there is nothing to lift the hammer! > Yes, yes! > > * Turned the jack regulating screw … jack did > not move any further > > back. I could push it back, but it just came > forward again when > released. > > * The wippen spoon was bent a little, more > angled than on > neighboring > > whippens … almost as though someone (factory?) was > trying to get that > > jack into position. Straightened the spoon. No > help. Turned the > > regulating screw until the felt and dowel were no > longer even touching > > > the spoon. Jack stayed right where it was. > > > > > >Hint: I had to remove the jack to fix the trouble > but there was no > >problem, whatsoever, with the jack. In reinstalling > the jack, I used a > >certain tool that I already had at hand … (what a > giveaway!) > > > > > > > >Puzzler: If I said any more, it wouldn’t be a > puzzler now would it? > >What > >simple thing was necessary to restore this key to > full power and proper > > >regulation? > > > > > > > >Prize: One of my regular clients. (Note: I get to > pick which one, and I > >have someone specific in mind.) > > > > > > > >(To Joe Garrett: Thanks, Joe. And feel free to > submit an entry.) > > > > > > > >Alan R. Barnard > > > >Salem, MO > > > > > > > >*Grooveless? Like, wow, Man, that is so un-glad. I > am, like, totally > >bummed for you. I really feel for that felt. Have a > flower. > > > >--- > >Outgoing mail is certified Virus Free. > >Checked by AVG anti-virus system > (http://www.grisoft.com). > >Version: 6.0.495 / Virus Database: 294 - Release > Date: 6/30/2003 > > _______________________________________________ > pianotech list info: > https://www.moypiano.com/resources/#archives > > --- > Incoming mail is certified Virus Free. > Checked by AVG anti-virus system > (http://www.grisoft.com). > Version: 6.0.495 / Virus Database: 294 - Release > Date: 6/30/2003 > > > --- > Outgoing mail is certified Virus Free. > Checked by AVG anti-virus system > (http://www.grisoft.com). > Version: 6.0.495 / Virus Database: 294 - Release > Date: 6/30/2003 > > > _______________________________________________ > pianotech list info: https://www.moypiano.com/resources/#archives __________________________________ Do you Yahoo!? Yahoo! Calendar - Free online calendar with sync to Outlook(TM). http://calendar.yahoo.com
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