Alinging valves

Discussion in 'Trumpet Discussion' started by eisprl, Sep 28, 2004.

  1. eisprl

    eisprl Mezzo Piano User

    Age:
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    Sep 26, 2004
    Halifax, NS CANADA
    Hey,

    is there a way to see if my valves need aligning in the first and third valves? I can see that I need it in the 2nd one.

    eric
     
  2. W Scott

    W Scott Piano User

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    Dec 8, 2003
    Carson City, NV.
    There is a way to see but it involves some fairly expensive equipment. A better way to tell is by how the horn plays. Are you having trouble hitting notes? Do you sometimes hit notes that you have no idea what the note was? If so, you may need an alignment and maybe even a valve replating.

    How old is the horn and how much has it been played?


    Bill
     
  3. dizforprez

    dizforprez Forte User

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    Nov 2, 2003
  4. eisprl

    eisprl Mezzo Piano User

    Age:
    34
    602
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    Sep 26, 2004
    Halifax, NS CANADA
    Tuning

    Hey,

    I was just wondering because my second one is quite out of alignment when you look into the slide. Also, my tuning is not what it once was. (I bought the horn last summer used froma friend). It's a relativley new horn the serial number is bigger than the ones on the bach dating site.

    eric
     
  5. W Scott

    W Scott Piano User

    488
    4
    Dec 8, 2003
    Carson City, NV.
    Well, the folks at the Brass Bow can tell you what needs to be done. Call them and tell them you want to set up an appointment for a PVA. The PVA costs between $110 to $140---depending on the horn and how much work has to be done. They will measure the valves first and see if a rebuild is needed. My guess is that you are a victim of the infamous Bach quality (or lack thereof) issue. 8)

    Bill
     
  6. JackD

    JackD Mezzo Forte User

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    Nov 30, 2003
    Manchester / London
    Is it me or is all this consists of replacing the felt / rubber at the top of the valve casing?
     
  7. W Scott

    W Scott Piano User

    488
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    Dec 8, 2003
    Carson City, NV.
    No, it's not just replacing the felt at the top. It's getting the right thickness of felt at the top; replacing (if the valve has it) the cork under the valve cap; and adding spacers to the valve stems; adding different springs if needed----plus the labor for pulling the valves out and in, checking and rechecking the measurements. It's labor intensive and there's not too many folks who know how to do this right.
     
  8. Tootsall

    Tootsall Fortissimo User

    4,529
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    Oct 25, 2003
    Yee HAW!
    And that's just for vertical alignment. There is also radial alignment in which they may have to unsolder the spring cage, rotate it a bit, and then resolder it back onto the piston itself! They will also ensure that the anti-rotation tab on the guide is in the proper orientation. A "total alignment" requires both the vertical and radial to be checked and adjusted if necessary. Very labor intensive and specialized.

    If you want to see if an alignment "might" improve things, see if the ports line up with the piston with the valve down and the valve up. (a small, focussing flashlight is a help here and you might need a dentist's or mechanic's mirror to be able to see "up" the 3rd slide tubing). If one or all are out by a significant amount you might be able to get a local shop to put some new pads/shims in "for cheap". If that makes a big difference then you might be happy at that. If "nothing but the best" will do, then it's off to Brass Bow, Brass Spa, or one of those specialized places for the "whole enchilada".
     
  9. MPM

    MPM Pianissimo User

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    Nov 10, 2003
    Valve Alignment

    What kind of horn? How old?
     
  10. eisprl

    eisprl Mezzo Piano User

    Age:
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    602
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    Sep 26, 2004
    Halifax, NS CANADA
    STRAD 37

    Strad 37 and I'm not entirely sure how old it is. It has a Stirling silver bell with brass slides and valves.

    Eric
     

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