QRP+ Mic problem

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From: Bill Acito 07-Aug-1995 2102 (acito@asdg.ENET.dec.com)
Date: Mon Aug 07 1995 - 21:16:44 EDT


        
        Just a follow-up to all who responded relative to my QRP+ mic
        problems.
        
        It was indeed RF feedback... I run less than ideal apartment
        dweller mode... a window mounted whip mounted less than 10ft
        from the rig.... no surprise. A bypass cap across the mike leads
        (.005uf) and a couple of ferrite beads on the mic inputs, close
        to the plug, seem to help substantially. 20m seemed to be the
        most susceptible.
        
        A Radio Shack replacement HT mic can be modded for use. It seems
        to work well, but I'm going to try the Ten Tec kit mic, too (and
        take advantage of the case discount to boot for some other
        projects).
        
        b
        
                                        
                
    . . . . . . - I own my own words - . . . . . .
   
  Bill Acito |d|i|g|i|t|a|l| kc1gs
  acito@asdg.enet.dec.com qrp-ne 260
  Digital Equipment Corporation, Hudson, MA norcal 1147
                                                        arrl life

        


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