So, 2 to 5 grams were the readings you got for jack centers? 2 should
not be a problem, but 5 could be. And are we to surmise that the jacks
with excessive friction in their action centers were cheating because
they do not return rapidly enough, or at all?
As for the repetition levers, .5 to 2 grams is definitely loose, and
could contribute to a jack not returning promptly, due the the lesser
amount of repetition spring tension. (The pinning of the hammer center
also plays a parts in how strong the rep. springs are.)
Would we be correct in assuming that you have already checked basics
typically associated with cheating jacks such as inadequate rep.
spring tension, jack position (vis a vis the knuckle) and repetition
lever height?
Alan
On 11/8/18, Willem Blees via Piano Technicians Guild
Original Message------
James
If the piano is anywhere close to the ocean, you might want to consider installing a DC in the action cavity or at most, directly under the keybed or by the bellyrail as close to the back end of the action as possible. Most Baldwin action center problems I encounter in Hawaii are solved with a damp chaser keeping the action nice and toasty.
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Willem "Wim" Blees, RPT
Mililani, HI 96789
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