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 I experience a little RF getting into the wife's TV with a similar antenna..  
149 foot center fed Zepp at 65 feet height with 94 feet of 450 ohm ladder line, 
to a 1:1 coax balun, then any length into the house.. tunes up on 3885 KC and 
7200 KC with no tuner needed.  Found this design on the web, guy called it a 
Half Extended Double Zepp for 40 meters with the bonus of 75 meter operation.  
Some gain on 40 .. Putting 250 watts AM carrier into it.. it causes a little 
lines on the TV, thought this due more to the transmitter issues, 1952 Globe 
King 400B - which is well screened for TVI but cant stop all of it..
 
73, Tim K8WBL
                                          
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