Measuring strings for replacement

[Joe And Penny Goss]

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Hi Cy,
Some detective work might be necessary here as well. But before I get to =
that, not long ago at a chapter meeting, demonstrating Knot tying and =
replacement of string, we decided to re string the spliced wire. The new =
wire broke before it was pulled up to pitch. The second try with the =
same new wire supply held. Heck wire breaks.
You might read the wire sizes on either side of the broken wire, as well =
as the one remaining original un broken wire. You are looking for past =
history or mistakes.
Remember that unless you have single tied off wire, eash wire size must =
span unisons at least two notes at a time, and by a factor of two. ie A =
A# (2)or A A# B C (4) etc.
Joe Goss RPT
Mother Goose Tools
imatunr@srvinet.com
www.mothergoosetools.com
  ----- Original Message -----=20
  From: David Ilvedson=20
  To: pianotech@ptg.org=20
  Sent: Tuesday, November 16, 2004 9:20 AM
  Subject: RE: Measuring strings for replacement


  Measure an existing string in the same unison. =20

  David I.

  ----- Original message ---------------------------------------->
  From: Cy Shuster <741662027@theshusters.org>
  To: Pianotech <pianotech@ptg.org>
  Received: Tue, 16 Nov 2004 08:48:31 -0500
  Subject: Measuring strings for replacement

  O, List: may I ask yet again to tap in to your collective wisdom?  I =
need to accurately mic a string, and/or round up or down a size, =
depending on which is safer.

  I had a treble string break during tuning yesterday (D#7) on a 1975 =
Kimball console, right next to E7, which had also apparently broken =
years ago (and was fixed by easing a tuning pin's width of string around =
the hitch pin).  Unfortunately, this rob-Peter-to-pay-Paul approach =
failed; the string broke again at the becket long before it got up to =
pitch.

  [Side note: the owner had taught piano and had had it tuned regularly, =
so I figured the break was due to metal fatigue at the becket.  I was =
surprised when it broke again at the new becket I had just made.  Shall =
I expect more breaks?  Does the steel become brittle over time, like =
brass?  There was a 25W DC bar plugged in, so little string corrosion =
(and good pin torque).]

  I just bought a multi-anvil, friction, vernier micrometer.  I've =
measured this string (out of the piano, in different places) at .037 =
twice and .035 once.  There aren't too many straight places; the whole =
piece is only about a foot long.

  Should I use the biggest size I've measured, assuming there may be =
stretching (especially because of the break), or do I need micrometer =
lessons?  (Hmm, I should measure the strings on both sides, in the =
piano...)

  Thanks...

  --Cy Shuster--
  Bluefield, WV

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