[Antennaware] J-Pole

[Guy Olinger]

VHF Experience:

Used many times. On 2 meters, clearly quite a better base station antenna
for an emergency setup than a 1/4 wave on the antenna jack of a 2 meter
transceiver. Way, way better than a duckie. Easily the difference between
making and failing a difficult path to a repeater, or the difference
between being able to run high or low power for battery life. If made from
300 ohm twin lead, easily rolled up for transportation or storage and fits
nicely in a compact kit of E-setup necessaries, and strung up with a piece
of twine to any convenient support point including from duk-tape stuck to
ceiling. Not as good as a multi-collinear radiator like a Station Master,
but have used twin lead J pole as temporary repeater antenna while we fixed
ice damage to station master and feed up the tower.

73, Guy K2AV


On Tue, Aug 5, 2014 at 11:53 PM, Joe Subich, W4TV <lists at subich.com> wrote:

>
> A J-pole is an end fed zepp - 1/2 wave ground independent radiator.
> Free space gain 2.1 dBi.  The bottom 1/4 wave is a parallel line
> matching section.
>
> 73,
>
>    ... Joe, W4TV
>
>
>
> On 2014-08-05 11:32 PM, Jim Miller wrote:
>
>> OK, I know this is funny.  Everyone needs a laugh once in a while.
>>
>>
>>
>> Just wondering if anyone knows the gain(lack of) for a typical J-Pole?
>> Measured, modeled, or folklore?
>>
>>
>>
>> And, what is the theory - no ground needed - does it function as a
>> collinear?  What then?
>>
>>
>>
>> Thanks, Jim KG0KP
>>
>>
>>
>>
>>
>>
>>
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