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Author Message   Glenn Middleton Tinkerer Username: Glenn Post Number: 33 Registered: 07-2006 Rating: N/A Votes: 0 Posted on Monday, August 28, 2006 - 11:00 am:    Many have an adjustment 'screw' in the centre of the dial, this may be hidden under a metal nameplate etc. As I have no direct knowledge of your instrument, I am afraid I cannot offer any positive help.