If the tower is 128 feet tall, just connect the center conductor of
the coax to the tower and the coax braid to your radials.
If the tower is NOT 128 feet tall, you will need a matching network.
Lots of good info on this in ARRL Antenna Handbook.
Remember ... if the antenna is shorter than 1/4-wavelength, you will
need some inductance in series with your feedline .. if it is longer
than 1/4-wavelength [NICE TOWER!], you will need capacitance in series
with your feedline.
Good luck
Don
N8DE
Quoting Its from Onion <aredandgold@msn.com>:
> Thanks for all the information that I have received from the group,
> on shunt feeding a tower. Now I realize that I should have said,
> "BASE FEEDING A INSOLATED TOWER" (haha).
>
> Did learn a lot about shunt feeding, but if anyone has some info on
> base feeding where the whole, insolated tower is used please forward.
>
> Want to use R-25 and intended frequency is 1.8Mhz. Yes, lots of
> radials, I know.
>
> thanks and 73
> Lee
> KE4VYN
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