Oops... FW 16 42.7 17 33.1 40 16.3 41 19.1 64 7.2 65 8.2 I notice the form I made doesn't transfer as nicely as I'd like...;-[ David Ilvedson, RPT Pacifica, CA 94044 ----- Original message ---------------------------------------- From: "Ric Brekne" <ricbrek at broadpark.no> To: pianotech at ptg.org Received: 8/6/2006 5:08:25 PM Subject: bechstein >Lists, >I hope I can run some numbers by you for input... >Bechstein E, #158555, 1966, Renner action...hammers not original but >appear to be Renner 17 mm KC >Hi David. >We are missing the FW's in this data set. How did you establish your >ratio without them... or did you just leave them out here ? >Looks like your hammers are about mid medium weights... probably you >could go up a couple notches, especially if your ratio is indeed around 5.7 >Post the FW's >Cheers >RicB >N U D BW SW KR WW >KC R >16 24 56 40 10.7 .53 >19.5 17mm 6.8 >17 20 56 38 10.7 .52 >20.4 17mm 5.6 >40 42 55 48.5 9.4 .52 >20.4 17mm 5.7 >41 36 54 40 9.7 .51 >19.9 17mm 5.8 >64 36 54 45 7.2 .51 >19.9 17mm 5.8 >65 37 53 45 7.1 .51 >19.8 17mm 6.1 >Bob M. at Pianotek thinks I need heavier hammers on this 9ft piano. >The piano is generally in a studio and rolled out to a stage/gym a few >times a year. I don't think I need a heavier hammer... >I mocked an Abel Standard hammer on key #33 with a stock weight of 9.1 >grams gave me, with a 3/8" lead=11.5 grams on the key, a downweight of >about 50 and a 25 gram upweight. The hammer was stock so it needs all >the typical trimming which will lower it's weight and lower the >downweight and upweight...a lower up weight is not good... >I have so many questions...is it so important to lower my R? On the >sample the only really bad R was on #16 and #65...which raised my >overall R... >I haven't tried the shim to lower my R yet... >I really appreciate any input... >David Ilvedson, RPT >Pacifica, CA 94044
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