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I've checked some of my sources on the Odin flutter problem and they have 
indicated it is known to have only two potential sources, both of which 
are correctable.

1)  The most common source of flutter is a bad rubber sleeve (often 
referred to as the ballon) in the second stage.  It may take trying 
several different rubber sleeves to get one that fits and balances the 
pressure correctly, but the will usually solve the flutter problem.

or

2)  The second know cause is the regulator mouth piece.  If you have 
changed the original mouth piece to a smaller sive for comfort it can 
cause flutter.  The smaller opening of the mouth piece interfers with the 
designed air flow and creates a back pressure resulting in flow.

Correcting either or both of these problems should elimenate flutter in a 
properly adjusted Odin.

===========================================================================
Curt W. Smitka, Administrative Manager      Phone:  (313) 936-0702
Department of Environmental                 Fax:    (313) 764-9424
    and Industrial Health                   E-mail:  CWSMITKA@SP*.UM*.ED*
School of Public Health
University of Michigan
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