The KR range on this action is actually .51 - .54 David Love ----- Original Message ----- From: "Phillip Ford" <fordpiano@earthlink.net> To: "pianotech" <pianotech@ptg.org> Sent: August 14, 2002 9:47 AM Subject: More dip in bass The topic of a graduated keydip from bottom to top, or more keydip in the bass, came up in a discussion that I had with David Love about the action from a Baldwin SD-10 that I'm rebuilding. This action has an angled balance rail and an angled capstan line (in other words not parallel to the front of the keys or the keyslip), like a Steinway D action. The key ratios vary a bit from the bottom end to the top end of the keyboard. The keys at the bottom end have a key ratio of .52 and those at the top end have a key ratio of .54. The action is Renner and of good quality. I don't know if this change in ratio was deliberate or accidental. The result of this is, unless I change the capstan locations, that the blow distance or the keydip must be graduated from one end of the keyboard to the other for all the notes to have the same aftertouch. Have any of you seen other actions with a graduated key ratio that you thought was deliberate? My own personal feeling is that more keydip in the bass feels natural and I often set actions up like this. Pianists who have given feedback have seemed to like the actions, but I've never done a direct A-B comparison between uniform keydip and keydip graduated from bottom to top to see if they prefer the graduated keydip. Any thoughts about this? Any feedback from pianists on this? Phil Ford Phillip Ford Piano Service & Restoration 1777 Yosemite Ave - 215 San Francisco, CA 94124
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