[TPIN] Bach question - easy bore size comparator

[Denny Schreffler]

I have a large bore Bach B-flat, #328,xxx in silver that I purchased new
in 1989 or early '90.

In addition to the (sans serif) "L" on the 2nd casing just above the s/n,
this horn has an "L" (with serifs) appended to the "37" on the bell.

An easy way to compare bore size is to remove the first valve tuning
slides of the two horns and run the shank of a tpt mpc up the inner
tubing of each -- it won't give you an objective measurement, but it is a
quick and accurate-enough comparator.

Denny Schreffler
Tucson

  ----- Original Message -----
  From: "David Johnson"
  To: tpin at tpin.okcu.edu
  Subject: [TPIN] Bach question
  Date: Sun, 13 Apr 2008 10:47:33 -0400 (EDT)


  I have an question for the Bach experts.

  I am trying out a Bach Strad sn 4xx,xxx. The second valve casing is
  clearly stamped with an "L" indicating a large .462 bore. The bell is
  a
  37, however, which is an unusual combination, right? I also have 2
  other
  Strads, a regular 37 lightweight and a Vindabona, and the tuning
  slides
  from the large bore horn are virtually interchangeable with the two
  ML
  bore horns. I don't have any accurate measuring device, but the inner
  diameters of the slide tubing seem to measure the same (as measured
  on the
  shank of a trombone mouthpiece). So what's up with that? Is it
  mismarked?
  Is this another testament to Bach's quality control? BTW, the horn
  does
  play very well. I was just looking to try a large bore horn, having
  played
  medium bore horns for years (Connstellation, Martin Committee and
  Yamaha
  Bobby Shew). Am I missing something here?
  TIA.


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