Coprion question

Discussion in 'Trumpet Discussion' started by ConnDirectorFan, Mar 12, 2016.

  1. ConnDirectorFan

    ConnDirectorFan Fortissimo User

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    Question for those of you who own Coprion bell or seamless/electroformed-copper bell horns - does the bell "ring" when flicked, produce a dull thud, or other? How would you describe it?
    (almost instantaneously I regret asking such a subjective question...the curiosity will kill me I suppose)
     
  2. Sethoflagos

    Sethoflagos Utimate User

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    You can make it a bit less subjective if you record it into Audacity or similar, preferably with a decent microphone.
     
  3. tobylou8

    tobylou8 Utimate User

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    It rings on my 12A and I can discern 5 different tones, maybe 6. I love my 12A!!!
     
  4. ConnDirectorFan

    ConnDirectorFan Fortissimo User

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    Before I go about making a recording, I have noticed the same ring on my Franklin Imperial cornet, but a Conn trumpet with such a bell has a very dull "thud" which I don't want to attribute to the bracing...
     
  5. tobylou8

    tobylou8 Utimate User

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    This is a decent shot of the last brace on a 12A. There's about 8 1/2 inches from brace, with a small footprint, to bell rim. This "sets it free" to resonate imo.


    [​IMG]



    Here's the 12B (that I don't have, yet :cool:) and while I can't measure, it looks to have less distance from brace to bell. I know this is subjective as Seth noted, but I'm not sure thud is a term I could use for any bell except my Ambassador and it's a heavily braced armadillo-like trumpet.


    [​IMG]
     
  6. rowuk

    rowuk Moderator Staff Member

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    This may or may not apply, but I had a Bach 72* and it "pinged" when I bought it. After about 8 years of heavy playing, it was much closer to a thud. I can't help but think that vibration over many years will change the vibration modes. Brass is soft, but copper is softer and I would assume even more liable to change over the years. Reannealing the bell could probably recapture the ring.
     
  7. Sethoflagos

    Sethoflagos Utimate User

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    No coprions, but here's a small database to be going on with:

    1) B&S Rotary
    2) Inderbinen Alpha C
    3) Yamaha 6335HS II
    4) Severinsen
    5) Wild Thing
    6) Besson 10-10
    7) Monke (piston)
    8) Spiri Vario

    Audacity traces:

    [​IMG]

    WAV file:

    https://soundcloud.com/seth_of_lagos/bell-bings

    (sorry about the background voices - you know what its like when you ask them to be quiet ;-))

    All recorded directly at the mouth of the bell, with a sharp tap from a plastic cig lighter.

    The Monke is the only one I'd describe as dull. The Sev rings as well as any.
     
  8. Bochawa!!!

    Bochawa!!! Forte User

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    Cole and Ayick in one post! My poor virgin eyes!!!

    Here, take this!!!

    [​IMG]

    And that!!!

    [​IMG]

    It "rings" on Ab above middle C (concert). 7" brace to rim (linear measurement).
     
  9. Dale Proctor

    Dale Proctor Utimate User

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    My Conn 9A has a bit of ring to the Coprion bell, but not as bright or sustained as my brass-belled horns. Bell brace to flare is 7.5".

    [​IMG]
     
  10. Bochawa!!!

    Bochawa!!! Forte User

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    Interesting idea. Perhaps Coprion ages like a fine single malt whiskey!
     

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