[pianotech] high leverage action

erwinspiano at aol.com erwinspiano at aol.com
Fri Mar 13 15:05:08 PDT 2009


Hi Gene
?May I assume that dip is measured at the very front of the key?
?Dale


-----Original Message-----
From: Richard Brekne <ricb at pianostemmer.no>
To: pianotech at ptg.org
Sent: Fri, 13 Mar 2009 11:34 am
Subject: Re: [pianotech] high leverage action


What are your Hammer Strike weights and key Front Weights ? Your dip and blow say low ratio but your KR and knuckle distance says high. How much aftertouch are you getting with things as they are... how far out from under the knuckle does the jack move ??
?
41 mm is on the short end of the stick to be sure. I usually dont see under 44 and never allow for less when redoing an action.?
?
Cheers?
RicB?
?
? Hello list,?
? Thought that I would seek comments on an action with high leverage.?
? Key dip is 10.5mm and blow distance is 41mm.?
? The touchweights are in the low 50's down and low 30's up.?
? Knuckle spread 16.5mm?
? Key ratio is 1.81?
? Action spread is 113mm and is adjustable.?
? Any more dip will make the sharps about level with the naturals when?
? depressed. The feel of the samples are acceptable. Seems that 41mm?
? blow distance is short - but is it too short? Maybe some loss of?
? power? Is there a down side to this action? Any corrective?
? suggestions? It is in the sampling - disassembled stage.?
? Thanks,?
? Gene?
?
?

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