---------------------- multipart/alternative attachment Hello Stephane, Yes, you have described what I thought was called a "Viennese action." Thanks for all of your helpful insights into this. Yes, it is quite like a modern action, other than the rocker capstans and the jack arrangement. Too bad there isn't a jack adjustment other than replacing the felt. That's how it appeared to me, but I thought I'd missed something! Don't know how much the lady wants to spend on getting this piano up to speed, but I look forward to working on it at some point in time. Thanks again, Dave Stah ln a message dated 6/4/03 11:12:24 PM Pacific Daylight Time, collin.s@skynet.be writes: > Hello Dave. > > A Bechstein with viennese action ? Never seen that. Isn't viennese action > that with the hammers placed on the key, and turned toward the player ? > From what you say (and from the age of the instrument), I believe that it > has a Isermann action, where you aling the jack to the knuckles by replacing > the little piece of soft felt on which the jack rests (often compressed) by a > new one of the correct thickness. This is very important, as incorrect > alignment of the jack causes much heavyness due to extra friction of the jack on > the knuckle, and extra work of the jack lifting the hammer shank over a longer > distance. > If I guess right, the by you called capstan arrangement is a rocker with two > screws, and with a little leg linked to the whippen. I believe that this > arrangement, well regulated, provides more control and quicker repetition > capabilities, as the key never looses contact with the whippen. It is just much > more work to take off the stack from the keyframe. Apart from this feature, > it should be the same as a modern standard action. > A common cause of noise in this action, apart from all the worn felt > bushings and punchings, is precisely that rocker, whose two screws must be tight > against it. Else, you get that wooden noise from the rocker's minute wobbling. > You would need a special (horizontal) screwdriver allowing you to access > those screws. There is a "tour de main", when regulating the blow distance with > this rocker, to always keep good contact and pressure between both screws > and the rocker. > If the action has a rail attached to the back of the hammer rest rail (but I > don't think so), that is a rail intended to stop the upward movement of the > back of the key (causing the key to lift from the balance rail on forte > blows, thus wobbling), and if that felt is compressed also, you can get much > knocking noise from there. Replace the felt by mid soft one, and regulate so the > keys fully depressed are just touching this rail. > > Hope this helps. > ---------------------- multipart/alternative attachment An HTML attachment was scrubbed... URL: https://www.moypiano.com/ptg/pianotech.php/attachments/57/75/56/ba/attachment.htm ---------------------- multipart/alternative attachment--
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