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Jim -<br>
While you don't seem to have swapped out the reps themselves, you appear
to have focused in on the damper mechanism as a variable. (I wrote the
following before re-reading your post re: dampers, but thought it worth
mentioning: <i>Did you notice whether the jacks were centered
in the rep slot? or whether the pinning of the jacks was firm?
Off-center jack can either contact wood or glue (jack stop felt).</i>
<br><br>
Zeno's point, re: damper stop rail felt is good, however, that would seem
immediately evident when testing individual damper lift. Wim's
observation also good. Did you check for any glue or hardness on
the key-end felt? <br><br>
David Skolnik<br><br>
<br>
At 09:19 PM 1/4/2013, you wrote:<br>
<blockquote type=cite class=cite cite="">An unsuccessful followup on this
post from November...<br><br>
Got back back to this 10 year old Renner action with a recalcitrant click
at and after letoff. There are now 2 of them, F1 & G#1.<br><br>
I had thought originally that the sound was from the shank assembly, so I
appeared armed and ready for knuckle changing or shank changing. Removed
and re-glued both knuckles, then set about putting in a Dampp Chaser.
Finished the DC and listen for the click...still
there...rats.<br><br>
Swapped a nearby quiet shank, and carefully regulated the swapped shank
so I got the full and proper letoff/aftertouch event. The swapped shank
produced the same click as the original shank. So my original assumption
that the shank was the culprit was too hastily decided. Started looking
around.<br><br>
-F1 had an anamolous geometry issue. JAck was smacking the jack stop
felt, while all the other notes including the other offending note,
G#1, were just fine at the jack stop felt. Removed half the jack stop
felt from F1...click remained. The jack toe is definitely set at a lower
angle than the other whips, and jack travel is more than the other whips,
but it doesn't seem to be the source of the sound, as I removed enough
felt to leave some clearance.<br><br>
-looked for flange issues on two whips (turbo). G# cracked on one side of
the flange, but F1 fine.<br><br>
-Then in messing around, I lifted the dampers with the pedal, and tried
both notes again. This time the click on both notes disappeared! I
suspected a loose lead in the damper levers. Took out the action played
with the offending damper levers, but as time was way past up, and had to
clear out, I couldn't remove the levers to check the weights on this
visit. In moving the levers there was no noise, but I don't think that is
a fair indication of anything, since connection to the back of the key is
their path to the click amplifying keyframe/keybed...though there is a
felt interface beween damper lever and key which I would think would
mitigate at least some noise.<br><br>
Question?...does this sound like the modus operandi of loose damper lever
weight? Why would damper lever weights click at and after letoff?
Let off does impart a kick to the key, which might rouse the offending
leads, but I'm still somewhat sceptical...but running out of ideas. I
scheduled a DC followup tuning in 3 weeks, so I have an imminent
rematch.<br><br>
Jim Ialeggio<br><br>
<br><br>
<br><br>
-- <br>
Jim Ialeggio<x-tab> </x-tab><br>
jim@grandpianosolutions.com<br>
978 425-9026<br>
Shirley Center, MA<br><br>
<br><br>
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