Quiz Time

[Doug Mahard]

----- Original Message -----
From: Richard Brekne <richardb@c2i.net>
To: PTG <pianotech@ptg.org>
Sent: Thursday, March 09, 2000 4:09 PM
Subject: Quiz Time


> List..
>
> Bumped into something "new" today.. so I thought I would put it forward
> in the form of a quiz.
>
> Piano... August Førster... about 20 years old.
>
> Symptom..... Blubering on soft play reported by the owner. In addition
> my own feeling of a kind of "heavyish" feel to the action.
>
> Conditions: Letoff was at 1.5 mm - 2.5 mm, checking was well within
> acceptable parameters, key dip was 10 mm and this was way more then
> enough for jack clearence under the knuckel. No lost motion yet jacks
> easily slipped under the knuckle on release.  Dampers... newly regulated
> and in fine shape. Jack stop rail adjusted for plenty of clearence. Keys
> level and at factory specified height.
>
> In spite of this seemingly fine situation there were about 30 keys that
> were blubering on soft play.  Took me a few minutes dinking around to
> figure it out, and I am sure I have seen this exact problem before
> without solving it.. but this time I got it right and I was really a bit
> suprised at the dramatic results. Blubering completely dissapeared and
> the "heavyish" feel to the action was totally relieved.
>
> Good hunting... Answer tommorrow. grin
>
>
>
> --
> Richard Brekne
> Associate PTG, N.P.T.F.
> Bergen, Norway
>
Hi Richard,

Repetition springs to strong on blubbering hammers?

Doug Mahard