J Pole for 40
 

Say you have an half-wave, end fed antenna that is layed out as an inverted
L, 26 feet vertical, 40 feet horizontal. Can you convert this 40 metre EFHWA
into a J pole by running the J part near the ground?

ie


_________________________________40 feet
|
|
|
| 26feet x = feedpoints
|
|________x_____
|
|
________x_____|

"Richard" wrote in message
...
Say you have an half-wave, end fed antenna that is layed out as an
inverted
L, 26 feet vertical, 40 feet horizontal. Can you convert this 40 metre
EFHWA
into a J pole by running the J part near the ground?

ie


_________________________________40 feet
|
|
|
| 26feet x = feedpoints
|
|________x_____
|
|
________x_____|

I think you would be better off with a different antenna all together. A 1/4
wl antenna with the full length mounted vertically would probably be better
than this 1/2 wl antenna. Or center feed the horizontal section and and let
the ends hang down 13ft. An inverted V may fit in your 40 ft of space.I am
assuming you have a space problem.

"Richard" wrote in message
...
Say you have an half-wave, end fed antenna that is layed out as an
inverted
L, 26 feet vertical, 40 feet horizontal. Can you convert this 40 metre
EFHWA
into a J pole by running the J part near the ground?

ie


_________________________________40 feet
|
|
|
| 26feet x = feedpoints
|
|________x_____
|
|
________x_____|

My guess is that the input impedance of this antena is on the order of a few
hundred ohms as compared to the input impedance of a normal J poles
"radiating section" which would be a few thousand. A balun may be the better
way to go.