[TowerTalk] separation between 40m rotary dipole and 3 element beam

J. Hunt ki5dq at yahoo.com
Fri Mar 18 19:26:48 EDT 2022


 Have my 40 meter rotary dipole 8' above the quad band beam, parallel with the beams boom, opposite side of the mast pipe.  
The opposite side cancels some of the shear forces on the HyGain Tx2 rotor.
Cheers,Jameski5dq

    On Friday, March 18, 2022, 05:40:26 PM CDT, Jim Brown <jim at audiosystemsgroup.com> wrote:  
 
 On 3/18/2022 1:36 PM, Jamie WW3S wrote:
> What would be an acceptable separation between a 40m rotary dipole and a 
> 3 element beam?

The same stub carefully placed as described in this link in the 40M 
feedline to suppress the second harmonic of 40M will also kill 
interaction of that 40M dipole with 20M. The first link is text, the 
second is the slide deck for talks I've done on the technique.

http://k9yc.com/LocatingStubs.pdf
http://k9yc.com/StubPlacement.pdf

73, Jim K9YC
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