This is a multi-part message in MIME format. ---------------------- multipart/alternative attachment En principe c'est possible Pierrot ----- Original Message -----=20 From: Piannaman@aol.com=20 To: pianotech@ptg.org=20 Sent: Wednesday, March 23, 2005 7:39 AM Subject: Re: Bergman upright action problems Bruce, The problem is that there is too much weight in the front of the keys = for the weight of the action and spring tension combined to push the key = back into place no matter how much lost motion I take out of it (I = removed all I should have needed to and then some). This is not a = garden variety regulation problem, unfortunately. =20 Dave Stahl In a message dated 3/22/05 9:13:14 PM Pacific Standard Time, = justpianos@our.net.au writes: Hi, Missed the first part of this message, so this may be irrelavent, = but assume=20 this is an upright. Hence hammers should not be of the rail at all, and jacks should not = have to=20 force themselves under hammer butts as a gap should exist for this. = Even in a=20 grand the jack doesn't support the hammer roller, so regulation is = at fault. Bruce Browning - The Piano Tuner Piannaman@aol.com said: > Some pianos should just never be made.... > =20 > I think these are made in the Chinese Young Chang plant. They = look =20 > suspiciously like those little 107 jobbers that break jack springs = from=20 time to time. > =20 > First ("free") tuning presented a plethora of problems(Am I almost = as =20 > allitertive as Alan:-). The hammers were a good half inch off the = rail, =20 keys were=20 > tight, yada, yada, yada.... > =20 > The REAL problem was that the keyboard is so poorly weighted that = there is=20 > so much downweight in the black keys at either end of the = keyboard that=20 the=20 > action weight and springs can't hoist them back into position, = with damper=20 > pedal on or off. > =20 > I didn't take readings, but I could feel huge weight differences = from one=20 > key to the next. After everything was regulated as well as = possible, keys=20 > eased, keypins lubed, the jacks still could not force their way = back under=20 the=20 > butts, despite a healthy dose of teflon powder... > =20 > I stretched the jack springs to increase tension, though if I had = time I'd=20 > have replaced them with stronger ones. This seemed to get the = thing to=20 > function. > =20 > Short of pulling leads out of the fronts of the keys, any other = ideas =20 > helping this action? > =20 >=20 ---------------------- multipart/alternative attachment An HTML attachment was scrubbed... URL: https://www.moypiano.com/ptg/pianotech.php/attachments/91/d0/64/6d/attachment.htm ---------------------- multipart/alternative attachment--
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