Best VHF / UHF dual-band antenna for the money
What it is
Technically, the Pockrus™ J-pole Joystick™ antenna is a dual-band (2 meters and
70 cm) open-stub, half-wave
As a vertical radiator, it has a flatttened-donut omnidirectional pattern,
sending a radio signal exhibiting a gain of about
2.6 dBi on 2 meters
and about 5.2 dBi on 70 cm fairly equally in all directions parallel to the earth.
The rods are solid aluminum stock, and the angle brackets are aluminum. The rods are
threaded and attached by stainless steel nuts and Loctite™ to prevent accidental
loosening. Each antenna is fitted with an SO-239 (UHF) stud for connection to
your 50-ohm coaxial cable.
Why you want one
Installed outside and up above your roof line, you'll be able to send your radio signal out
much farther, reaching many more people than you might otherwise reach with a whip antenna or
rubber duck on your radio. By the same principle, you'll be able to hear and come to the aid of
many more people than you might with an antenna installed on your radio.
Even if you stand the Pockrus J-pole up inside your house near a window, your signal will get out
much better than with a whip antenna, even connected to a little handheld radio. Some install the
J-pole in their attics, which is not the most ideal location, but gets the antenna up higher above
How to order
To place an order, or to just ask questions,
email Carl (myjpoles at gmail)
The following types are available:
✓ dual-band (2 m / 70 cm) one-piece, 59 inches
✓ dual-band (2 m / 70 cm) two-piece
✓ 6-meter three-piece dipole, plus radials
✓ 220 MHz (1.25 m) one-piece
Here are a few things you might think about, to use in conjunction with your own
How to install the Pockrus J-pole
(shopping list, tools, grounding, instructions)
Online discussion about the technical characteristics of the open-stub J-pole
A few tips:
It's not necessary to ground the Pockrus J-pole antenna for performance,
but it's advisable to ground it for static and lightning.
Because the J-pole is an open-stub type, it's prone to producing
common-mode currents on its coax shield. To minimize shield radiation
(which can easily affect your computer speakers, smoke alarm, and cable
TV), fashion an RF choke out of about two feet of the coax by coiling
it into a six- to eight-inch diameter roll of four to six turns of the coax,
zip-tying them to keep the coil together.
Keep the antenna rods at least a couple of feet from any power supply,
charger, or wall wart.
Keep the antenna at least a couple of feet from any metallic objects, such
as aluminum siding, stucco chicken wire, or chain link fence. It's ok to
mount the antenna on these metallic things; just be sure to not let any of
the attached items stick up higher than the aluminum angle bracket.
Carl Pockrus at the
Utah Valley Swap Meet
Another happy customer
Questions? Ask Carl, WE7OMG