Backcheck height

[Isaac OLEG]

Hello,

It may well depend of the kind of tail, on Bechstein, the tail allows
for a very high checking without touching the backchecks even with a
lot of shank flex.

The dimension I know is more around 3/32 or 2mm, nowadays, if the
backchecks are too high or the tails too long it can forbid the normal
checking also, I had the case on Abel heads on a Steinway B, no way to
have them checking high enough, I had to lower the backchecks by
screwing them on the wire to obtain a normal checking.
Low checking give the impression of more power, but the repetition in
light play does not work.

Lowering the backchecks add a little power to the tone of a thinner
note(sometime the original backchecks was higher than the neighbours
also)

On verticals, the good checking is  giving strength to the tone also,
my guess is that it have to do with the synchronism between the
checking and the bottoming of the key in both actions.

Best regards.

Isaac OLEG

Isaac OLEG

Entretien et réparation de pianos.

PianoTech
17 rue de Choisy
94400 VITRY sur SEINE
FRANCE
tel : 033 01 47 18 06 98
fax : 033 01 47 18 06 90
cell: 06 60 42 58 77

> -----Message d'origine-----
> De : pianotech-bounces@ptg.org
> [mailto:pianotech-bounces@ptg.org]De la
> part de Alan Forsyth
> Envoyé : mardi 27 mai 2003 22:01
> À : Pianotech
> Objet : Backcheck height
>
>
> Dear listed ones,
>
> >>>>"The backcheck should be set so that when the hammer
> rises to its
> highest point (at let-off) the bottom of the tail is 1/16"
> above the top of
> the backcheck.  Tails should be 1" long ......
>
> David Love">>>>
>
> Umm ....Why??
>
> AF
>
> _______________________________________________
> pianotech list info: https://www.moypiano.com/resources/#archives
>