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Thread: New Intonation Chart for Eastman 526

  1. #11
    Join Date
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    "It [526] has the exact same bell size (12) and bore size (.610 / .630) as the M5050."

    According to dillonmusic.com, the M5050 bell diameter is 12.205 inches, rather than 12.0 inches. Its bore is 0.610 inches and 0.638 inches.

    Miraphone M5050T-SP-WC 4 Valve Compensating Euphonium, with trigger and case, Silver Plate - Dillon Music Web Store


    These values appear to diverge slightly from those cited in this thread for the Eastman 526.

    Best, G.
    Last edited by guidocorona; 06-24-2023 at 12:53 PM. Reason: Added Dillon M5050 URL
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  2. I had my Eastman 526gs handy and got these measurements. Not completely sure if I got that right? This doesn't add much to the convo, I was just curious!
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  3. #13
    Quote Originally Posted by ivanhouston View Post
    I had my Eastman 526gs handy and got these measurements. Not completely sure if I got that right? This doesn't add much to the convo, I was just curious!
    That's pretty close for the 4th valve bore measurement. In my own measurements I find that a little wigging of the two probe ends (in either the horizontal or vertical plane) can make a difference. In any case, it's about a 1.5% difference, which is not much of an "error".
    Dave Werden (ASCAP)
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