Single Strings and bearing

[Mike and Jane Spalding]

David,

Perhaps you can customize the shape of your loop to allow it to rest at the bottom of the hitch pin.  The traditional easy loop is just large enough to fit over the pin, with tight windings beginning immediately.  What if you did something more like the end of a bass string:  elongated loop, loose twist for about an inch, then begin the tight windings?  Depending on the contour of the plate, that might sit a little lower?

hope that helps

Mike

----- Original Message ----- 
From: David Love <davidlovepianos@earthlink.net>
To: <pianotech@ptg.org>
Sent: Monday, June 17, 2002 10:18 AM
Subject: Re: Single Strings and bearing


> Yes, I realize that is the alternative.  The question is whether 'tis better
> to maintain the theoretically perfect scaling with the tied strings having
> less than perfect inclination on the bridge, or less perfect scaling with
> better inclination on those few strings.  Lowering the plate is not an
> option for a variety of reasons which I won't go into.
> 
> David Love
> 
> ----- Original Message -----
> From: "Jon Page" <jonpage@attbi.com>
> To: <pianotech@ptg.org>
> Sent: June 17, 2002 4:32 AM
> Subject: Re: Single Strings and bearing
> 
> 
> At 10:19 PM 6/16/2002 -0700, you wrote:
> >The last six unisons on the tenor bridge are plain trichords.  Each is a
> >different gauge: 18, 18 1/2, 19, 19 1/2, 20, 21.  Thus each unison consists
> >of a bichord from one continuous piece of wire that goes around hitch pin
> >and back to the tuning pin and one single string.  Because the wrap on the
> >single string rests on the plate, it raises the core of the wire slightly
> so
> >that if you measure the angle of inclination toward the bridge, it is
> >running downhill from the hitchpin to the bridge.  Thus, if you measure the
> >bearing based on the single strings in the unison, the bearing measures
> >negative.  The overall bearing on the bridge is still positive when all
> >strings are taken into consideration.  I am wondering if I might anticipate
> >any problem, perhaps, from these single strings not seating properly.  Of
> >course, the more I try to explain this, the more I'm inclined to just
> forget
> >about it.  But if you have any comments, please.
> >
> >David Love
> 
> 
> If you mean the 'tie-off' or twisted portion of an added single plain wire
> will sit
> on the plate thus raising the wire and reducing the down bearing then by
> simply installing two unisons each of 18, 19 & 20 will solve the all
> concerns
> in regards to like-sized wire on the unisons and downbearing. With no
> alterations
> done to the plate.
> 
> Would the inclusion of these half-sizes really be that much of an
> improvement?
> I doubt it.
> Regards,
> 
> Jon Page,   piano technician
> Harwich Port, Cape Cod, Mass.
> mailto:jonpage@attbi.com
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> 
> 
> 
> 
>