Touch Weight Too Heavy on MX100

[Richard Brekne]

Grin.... (as in a BIG one)...cant win em all...er...hehe

you could always remove the hammer butts then... that'll reduce weight.. :)

Richard Brekne
I.C.P.T.G.  N.P.T.F.
Bergen, Norway

Roger Jolly wrote:

> Hi Richard,
>                  It's a vertical model, HO,HO, HO. (smile)
> Regards Roger
>
>
> At 06:38 PM 09/12/99 +0100, you wrote:
> >I dont recognize this model number.. but I assume its a small grand
> diskplayer
> >??
> >
> >If so.. it strikes me that these weight figures you report are not sooooo
> >awfull that you couldnt bring them down to acceptables with a few good old
> >standard tricks like reducing hammer weight a bit, and protecking the damper
> >centers. That B7 is pretty darned high but there is usually some easy to fix
> >cause for the occasional way out of limits key.
> >
> >I'd first try a few spot checks to see what you can do with regulating and
> >hammer weight. Check the geometry as well, but you know all that. As for the
> >friction.. almost looks like you got to little in a few places.. or what ??
> >Does the action play kinda sloppy ??
> >
> >Richard Brekne
> >I.C.P.T.G.  N.P.T.F.
> >Bergen, Norway
> >
> >Tom Cole wrote:
> >
> >> Dear List,
> >>
> >> I tuned a Yamaha MX100A (1988) today that had a touchweight problem I
> >> found curious. It was the first thing the customer remarked about so I
> >> did some investigation.
> >>
> >> I noticed right away that the dampers picked up early but, with the
> >> dampers picked up by the pedal, the up and down weights were too high as
> >> well.
> >>
> >>   NOTE  DW      UW
> >>
> >>         C2      53      34
> >>         C3      57      36
> >>         C4      60      36
> >>         C5      64      38
> >>         C6      62      38
> >>         C7      62      39
> >>         B7      75      41      (C8 felt like it had a mechanical problem)
> >>
> >> There doesn't seem to be a friction problem and so the simple solution
> >> would seem to be to put lead weights in the keys to bring the
> >> touchweight down but I've never seen a Yamaha that was so out of
> >> regulation. Is there something about early Disklaviers that I need to
> >> know? Could this particular instrument have come from the factory that
> >> way?
> >>
> >> Unfortunately, I didn't think to pull out some key sticks to see if
> >> someone had pulled out the key leads. I did glance down the side of some
> >> Bs and Es in the bass to check for key leads and didn't see any nor any
> >> empty holes.
> >>
> >> The present owner bought it 3 years ago and the touch was heavy when she
> >> first got it. So far, two technicians have not been able to help her
> >> out, one of whom was a Yamaha tech.
> >>
> >> Thought I'd run it by the list before getting the lead out. Can anyone
> >> comment on this weighty subject?
> >>
> >> Tom
> >> --
> >> Thomas A. Cole, RPT
> >> Santa Cruz, CA
> >> mailto:tcole@cruzio.com
> >
> Roger Jolly
> Saskatoon, Canada.
> 306-665-0213
> Fax 652-0505