[TowerTalk] SHUNT FEEDING A TOWER

[Craig Clark]

EASY TO DO:

I favor a wire cage 12" on a side. Use 2x4's as standoff insulators.
Run the cage to the top of the tower. 2 or 3 standoffs will be fine. 
I use 2' spacing from the tower. This keeps the cage from moving in 
the wind. Ground the cage to the top of the tower. At the base, I use 
a step-up L network to match the antenna to the coaxial cable. In 
round numbers you are doing a 50 to 200 ohm transformation. Install radials.

Apply power from a radio or use an anaylizer of your choice. Tune the 
coil and capacitor for minimal SWR. You are ready to go.

If you want to get two bands, use a DPDT switch, make another 
matching network and you can get 80 on the same antenna.

The top loading will make a for an electrically "taller" antenna so 
you should be good-to-go on both bands.

GL and Happy DX'ing to you and

Happy New Year to all Towertalkians!

73, Craig Clark, K1QX

PLEASE NOTE NEW EMAIL ADDRESS
JCCLARK at WILDBLUE.NET

RADIOWARE AND RADIO BOOKSTORE
PO  BOX 209
RINDGE NH 03461
603 899 6957
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