A real Nut

[Kevin E. Ramsey]

    I just have one question, Richard. How was the aftertouch before you
started? Are you setting the key dip to some pre-conceived idea? I agree,
9mm is really shallow, but I would have checked blow distance and aftertouch
before just going with some pre-printed specs. I doubt that this is the
cause of the "clacks" though. Probably the underlever stop rail is too high.
Black keys are notorious for having a deeper dip, and raising the dampers
higher as a result.
    I wish I could see it. My technique for diagnosing problems, when it
comes right down to it is this, and it's really simple to remember;  Start
at the front of the key and move back, following the sequence of events, go
up through the whippen, through the hammer-shank assembly, to the strike
point. That sequence at least gives you a system in which you can diagnose
the problem without leaving out the thing that you refuse to see.



----- Original Message -----
From: "Richard Brekne" <Richard.Brekne@grieg.uib.no>
To: "PTG" <pianotech@ptg.org>
Sent: Tuesday, October 16, 2001 2:26 PM
Subject: A real Nut


> List
>
> Ok... perhaps someone is going to nail this one right away... but it
> took me a bit to figure out. Still I got it in the end...
>
> I was setting key dip today on my favorite Grotrian, been meaning to get
> around to this for a while as the dip was waaay to shallow and had
> caused some regulation creativity problems. (around 9.0 mm, perhaps even
> a bit less). Anways I roughed em in around 10 mm zip and started doing a
> few checks and right at the break between tenor and treble I ran into a
> couple black keys that made this really loud clacking sound when played
> hard.
>
> So you tell me.... what was the problem and solution !
>
> --
> Richard Brekne
> RPT, N.P.T.F.
> Bergen, Norway
> mailto:rbrekne@broadpark.no
>