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• The 11-Hz resonance is probably being excited by the second harmonic at 22-Hz... - John Elison 12:07:15 09/17/06 (2)
  In Reply to: HFRR Verical test posted by Jeff TOJ on September 17, 2006 at 09:18:25:

  Observe the wobble and see if you think it is wobbling at 10 or 11-Hz when the 20-Hz tone excites it.

  Just a thought!

  Good luck,
  John Elison
  
  

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  • Sure anyone can tell a 10-11Hz wobble a mile away. What ... - Garth 12:51:01 09/17/06 (1)
    In Reply to: The 11-Hz resonance is probably being excited by the second harmonic at 22-Hz... posted by John Elison on September 17, 2006 at 12:07:15:

    are you saying? Does the 20Hz jiggle look in fact like a 10Hz wobble?

    Second harmonic? And the third and fourth?

    Cheers!
    
    

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    • It is very easy to see the difference, Garth. (nt) - John Elison 13:16:12 09/17/06 (0)
      In Reply to: Sure anyone can tell a 10-11Hz wobble a mile away. What ... posted by Garth on September 17, 2006 at 12:51:01:

      
      
      

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