[TowerTalk] HF problem

[K7GCO@aol.com]

 In a message dated 99-12-07 12:45:05 EST, w7why@harborside.com writes:
 
 > >     I recently installed a Hy-gain TH5 on my 90 foot tower and have a 
 > Kenwood TS-450.  I received reports of a strong signal but 
 >that my voice sounds distorted.
 >  
       I don't think that anything you do to the antenna will affect your 
 transmitted audio. The comment about RFI seems most likely. Get a local to 
 listen to your signal on different bands and start isolating the problem. 
 
 Cheers,   Steve  K7LXC
  >>
    I would disagree and there is a simple process to track it down. With no 
or poor baluns or just excessive RF pick up on the coax shield below the 
balun being carried into the shack, RF can get into the mike circuit and 
create "RF Distortion" in the audio in particular with the processor on.  
I've had it happen.  Use a good or a different balun.  Or take the DE down 
and do a complete clean job on it inside and out of the tubing.  One bad 
connection can upset the DE currents even with a good balun.  The DE is 
grounded to the boom and can excite it, the mast and coax shield.  Try 
different mikes and or another similar rig with your mike and or other rigs. 
Ground the rig.  If it has a monitor circuit, listen for the distortion or 
changes with each other remedy.  Try it into a dummy load and monitor the 
audio in the monitor circuit or another rig in the shack with and without the 
processor on.    
k7gco

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