---------------------- multipart/alternative attachment In a message dated 11/19/2004 6:53:04 AM Pacific Standard Time, Erwinspiano writes: In a message dated 11/19/2004 6:47:04 AM Pacific Standard Time, Erwinspiano writes: Damperfiles I just finished up the upgraded S&S grand damper system & it works slick. I can set the individual key lift as precisely as I wish & then dial in the tray lift without the usual futzing with paper & such. Damper pedal lift is readily touch-up-able which is really cool & you can dial in a perfect lift in minutes after the dampers seat. Also I matched the original leading pattern & recycled the felt spring blocks & remounted them to the new lever in the original location in the old springs on the underlevers. This moves the spring back & prevents it from hitting the bottom of the upstop which the new spring slots approach interference I was having a bit trouble with nice clean damping shut off in the bi-chords. I typically use the Tokiwa damper sets which I like but even with wide bichord agraffes in the lowest 4 bichord notes I had too much ring thru & not enough felt penetration of the tip of the felt into the string pair. To remdy this I pulled the bichord heads all out & pinched the nose of the felt to slip thru the strings a bit more & voile. Clean sounding shut off. I got to wondering if some of you are using the same felt. I think the French felt Loreux might have a finer profile on the tip. It also great to be able to precisely set the upstop for one position Any way Skinned a new cat. Hope that''s OK with the dog Thanksgiving blessings on you all Dale List I've been modifying many of old Steinway damper systems with a variety of features which greatly improves its functionability & adjustability. Many of these ideas are not my own but have found them useful just the same.grin. I've been installing the new Renner Back actions fairly routinely which gives a more effective sostenuto usage with the spring loaded tabs & also the fact that individual parts can be taken off for service if necessary without disassembling the whole dang damper action I.E. to reglue some flanges that have come unglued or repin a part or two. Along with this I've also found that a few other modifications which are not difficult to execute also increase performance. ! Installing the tray center pivot pin so it is in line with the underlever centers. This requires modifying or making a new pivot block for at least one end. Result. 1.This eliminates the disparity of function in the upstop adjustment. Meaning an upstop adjustment is made which is equally good for pedal lift as is it is for individual key lift. 2. the heavy pedal syndrome is made more normal by reducing weight & friction felt on the pedal & eliminates much of the damper thumping on the strings by less experienced players 3. Eliminates the severe dipping of the underlevers when the tray is out of adjustment that digs out the key lift felt with extra friction caused by the out of adjustment. 4. removing wooden or brass pedal pitmans that (always) squeak. This requires drilling an enlarged hole thru the keybed 3/4" or so & installing a wooden dowel with 3/4" front punchings glued to each end & a balance rail pin installed and protruding 3/16 inch out of the dowel. The tray & pedal lever are drilled to accommodate the felt & pin The result is a totally quiet squeak-free movement 5. Install a new set of Modern adjustable pedal rods. What a blessing. See pianotek 6. Install a capstan as a sustain pedal lever travel limiter on the bottom of the keybed. This removes the archaic block of felt method formerly employed on all Stwy pianos, & others of course & allows for a precise amount of damper lift& lever travel. A nice feature which keeps the underlevers from slamming into the upstop felt creating those annoying dents which reduce function. 7. relocate tray return springs. In these pianos either a leaf spring type was used in the top treble end of the tray or in later models a coil spring was applied on the bass end of the tray causing the tray to warp. The new springs are fit between the lever sections. One is mounted close to the pitman which is where it needs to be to keep the tray from being twisted during lift,resulting in a strange array of damper lift setting problems & eventual tray warpage. Some systems require another mounted between bass and tenor sections. 8. The last thing which is new to me came about because of a conversation with David Love about this. Del had done a tray for him this way & I'd heard about others doing this so... I mounted small11/32inch long capstans under each underlever. This allows for a very precise & perfect damper lift without all the usual futzing and straining to move a lever in the flange just the tiniest fraction of a mm/or inch for standard folks. The lip of the tray needs to be thinned by about 3 mm to allow for capstan head clearance. A quick pass on the table saw does this in a second. Drill the appropriate size hole for the capstan shank & press with arbor press or Tap in carefully with a hammer with the tray supported really well 8. Installing the extra wide bichord agraffes from Pianotek on the lowest 4 bichords increase the ability of the bichord felt to get between the large bichord bass strings which really improves damping. 9 On many pianos, especially longer ones I also find improved damping by using four equally cut pieces of damper felt in the mono- chord section & on the first 2 to 4 bichord notes. This is especially helpful on longer strings & also on smaller pianos on which I have had all my mono chords double wrapped by the string maker. An Addendum. Some later stwys , 1950 ish & later came without return springs. I've learned this the hard way, ( of course), that these need springs especially in the bass. This is my humble opinion based on failure to damp experience, even with proper fitted guide rail bushings & nicely fit wires, head lift etc. These upgraded systems are a huge improvement over the original equipment setup IMHO and are not difficult to do. It does increase labor time but it's worth it Hope this is food for thought and comment. Dale Erwin Erwins Pianos Restorations 4721 Parker Rd. Modesto, Ca 95357 209-577-8397 Rebuilt Steinway , Mason &Hamlin Sales www.Erwinspiano.com ---------------------- multipart/alternative attachment An HTML attachment was scrubbed... URL: https://www.moypiano.com/ptg/pianotech.php/attachments/8f/c9/e5/7c/attachment.htm ---------------------- multipart/alternative attachment--
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