Bass String Length Equality

[Farrell]

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----- Original Message -----=20
From: "Ron Nossaman" <RNossaman@cox.net>
To: "Pianotech" <pianotech@ptg.org>
Sent: Monday, May 19, 2003 10:17 AM
Subject: Re: Bass String Length Equality


>=20
> >I am redoing an upright. I have notched the new bass bridge in the =
bicord=20
> >area. However, the pinned-cast-iron upper termination is in a =
horizontal=20
> >line, whereas the strings are at a fair angle - hence, the left =
string of=20
> >each bicord is a few millimeters longer than the right string. I =
should=20
> >think it fair to assume then that redoing this upper termination to=20
> >produce equal string lengths would be of some benefit.
>=20
> Didn't you make the notches parallel to the top bridge,=20

I knew I should have sent this to you/Del privately. Egg on my face. =
Amazing what you can learn by just rebuilding one piano. Amazing what =
you did not know while rebuilding it. Amazing what seemed like the only =
way to do it, later seems so obviously stupid.

No, I did not make the notches parallel to the top bridge. Indeed, would =
seem to be the logical thing to do. Ahh, hindsight.

> or did you notch=20
> perpendicular to the strings?

I'll give you one guess. Let's see how bright you really are!

> If the top bridge is wood, I'd make a new one=20
> to accommodate the notches in the lower bridge.

It's not wood, but rather just the simple ridge on the cast iron plate =
with the steel pins. Hey! I just bought a grinder!!!!!
=20
> If I was just replacing a bass bridge on a vertical piano without any =
other=20
> extensive work, I'd just bevel it like it was originally.

EXTENSIVE WORK ZONE!
=20
> >My question is: would the benefit/difference be audible - would it =
make=20
> >for a better piano to the discriminating ear?
>=20
> With the deviation as a percentage of overall length, and with the =
erratic=20
> nature of wrapped strings, it's doubtful. Still, if this happens to be =
the=20
> M&H you're putting all that redesign work into, it should be as clean =
as=20
> you can make it.

Yes it is the M&H, and yes I want to make it as clean as is (reasonably) =
possible.

Oh shoot. What a dipstick. I actually did think to make the notch the =
same way as the top termination - but that thought withered away - or =
maybe it was fogged out by all the other confusion.

I recall yesterday when my wife got home she asked me how my day went. I =
told her all activities had progressed in a positive manner. One of =
yesterday's activities was notching and pinning the bass bridge. Well, I =
guess that's why God made lots of maple......

Terry Farrell
=20
> >I should think the difference would be much the same as on a grand =
that=20
> >has agraffes in the bass and the bicord area of the bass bridge is at =
a=20
> >fair angle to the strings and is upgraded from a continuous single =
bevel=20
> >to proper notching. Does this upgrade on the small grand result in an =

> >audible improvement?
> >
> >Terry Farrell
>=20
> If the agraffe is already parallel to the bevel, notching and =
repositioning=20
> the agraffe so they will both be perpendicular to the string won't =
make any=20
> real difference.
>=20
> Ron N
>=20
> _______________________________________________
> pianotech list info: https://www.moypiano.com/resources/#archives
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