Bass string breakage (fwd)

[larryf@pacifier.com]

Forwarded message:
>
> >From: AlanL27@aol.com
>
> >Subject: Wurlitzer Bass string breakage.
>
> >I recently got a call to replace a bass string on a Wurlitzer Studio at a
> >High School.
> >I attempted to replace it with a universal bass string.
>
>  The second string
> >broke also.  I have never had this type of problem installing a universal
> >bass string before.
> >Alan Ladd
> >Anderson SC
>
>
> >From: hoplandr@cadvision.com (Ray Hopland)
> >
> >        I had a piano that had a bass string string would continually break
> >at the upper bass plate pin.
>
>  I bent the upper plate pin to the right slightly to
> >decrease the angle, and after 15 or so years, the string is still holding.
>
> >Ray.
> >
> OK Alan, the bass string has some bearing areas.  These are areas where the
> string bears down on a pressure point.  These points create friction or drag.
> If the friction is strong enough to oppose the slight movement of the string
> across these areas, th
>
> e
>
>  string could break.  The movement is most noticable at the upper bridge/upper
> pressure bar/v-bar/the point of contact with the plate nearest the tuning pin.
>  This is usually where a string will break.  The v-bar cast in the plate is
> usually the culprit.
>
>
>
>  It will have an unusually high spot, or sharp ridge that acts like a chisel
> when the string is under tension.  I've used anything from a Dremel grinder,
> to a very small cold chisel, to a hand file, to a piece of emery cloth to
> smooth the offending area
>
> o
>
> ff.  The moving of the plate pin, as mentioned above, quite possibly moved the
> string off the offending area.   What ever works and lasts long.
>
> Holiday Salutations
>                                      Larry Fisher, Metro Portland, Or.
>                       Factory Preferred Installer for PianoDisc Products
>                        phone 360-256-2999 or Email larryf@pacifier.com
>                       live life with variety and stare adversity in the eye!!