[TenTec] grounding dipoles

[Able2fly at aol.com]

Why use a switch at all? Tie all three antennas together at the coax. Run  
them parallel. The RF knows where to go. I am using 40, 30 and 20m parallel  
dipoles with a common coax feed.
 
Bill
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I'm  curious if I should disconnect the dipoles i'm not using to 
avoid creating  weird nulls or other problems or if it is okay to leave 
them connected to  the switch all the time - the main reason I ask is the 
antenna switch I  have connects the center and shield to ground when they 
are not selected  on the switch, in essence creating ground radials 
fairly close to the  active dipole.