[TowerTalk] Mosley Antenna Question

[TexasRF--- via TowerTalk]

Jim, you already know this but will mention as a reminder: In addition to  
open and short, you can also terminate the shack end of the coax in a + or - 
 reactance to achieve whatever reactance needed at the feedpoint of the 
parasitic  element. 
 
It sounds like you might be using a 45 degree or multiple coax length with  
open or short termination to generate a + or - 50 ohm reactance at the  
feedpoint. That seems a clever method of switching the parasitic dipole from  
reflector to director if the dipole is tuned to the operating frequency. 
 
Also, since both feed lines are available in the shack, you could drive  
both dipoles at such a phase relationship as needed to achieve various 
forward,  reverse or even squint patterns. This would constitute a 2-el driven 
array.  Isn't the HB9CV style antenna like that?
 
73,
 
Gerald K5GW
 
 
 
 
 
 
In a message dated 2/22/2015 2:43:13 A.M. Central Standard Time,  
jim at audiosystemsgroup.com writes:

On  Sun,2/22/2015 12:09 AM, Jim Thomson wrote:
> another option is to cut  the parasitic ele as a DIR.

Thanks for the suggestions, but thanks to  limitations of the 
installation, I'm stuck with what I've got up in the  air. What I have is 
simply two dipoles cut for the middle of the band, fed  with RG11. I'm 
driving one and tuning the reflector by varying the length  of the coax 
to an open or closed termination. In its half-done form, it's  a three 
position switch. Eventually it will be relays. :)

73, Jim  K9YC
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