[TowerTalk] Phasing Question

[wa3afs at inav.net]

I used to phase a pair of coaxial inverted Ls (a pair on 160m, a pair on 75m, and a pair on 40m).  I did the 
following:

1. The feedlines to each antenna had to be the same length.  Each antenna was separated by a quarter 
wavelength.
2. I had a NON-shorting coax switch in the shack (two position) with tee-connectors on each output.
3. Each antenna was connected to one of the tee-connectors
4. Between the other connections of the tee-connectors was a quarter wavelenght (velocity factor times 
the quarter wavelenght of RG59).  (246 X vel factor)/freq  ---
5. I used a tuner

The results were fantastic.  I used this system at two different QTHs.  I never even bothered to label the 
switches as to which direction was which.  Just switched back and forth looking for the strongest receive 
signal!

I admit that having 3 coils of 'delay line' in the shack was a mess and having the exact same feedline 
lenghts was a bother.

Presently, I use the  COMTEX phasing system on my pairs of 160M and 80M coaxial inverted Ls.  A lot 
simplier and the COMTEX phasing system (PVS-2 arrary) provides not only a switching of front to back, 
but also provides a third direction (more of a figure 8 pattern).  For 40M I use the COMTEX ACB-4 
phasing system for my 4 square of coaxial inverted Ls.

  -- Bruce, WA3AFS


> 
> So, there is another question I have.  If you just put up 1 vertical
> and put up another one 1/4 wave away, can you use this as a director
> or reflector by switching a coil in and out?
> 
> This seems like it would be a lot easier to do.  Thanks and 73
> Tom W7WHY
> 
> _______________________________________________
> 
> 
> 
> _______________________________________________
> TowerTalk mailing list
> TowerTalk at contesting.com
> http://lists.contesting.com/mailman/listinfo/towertalk
>