Simple 2 Meter JPOLE
Build your own 2 meter JPOLE Antenna

The J-Pole antenna is fundamentally an end-fed 1/2-wavelength antenna that uses a 1/4-wavelength long transformer section to supply the feed voltage. It is an ideal end-mounted, single-mast antenna. It is cheap and easy to build, sturdy, very easy to tune up, and performs quite well. The antenna to the left is made from 1/2" copper tubing and it is soldered together with (1) plumbing tee and (1) elbow. A plastic cap or copper nipple can be used on the tops to keep out water. The coax (RG-8 or equiv.) can be soldered to the pipe or attached with moveable conductive clamps (recomended). This antenna needs no impedance matching if you use 50 ohm coax since the resistance/reactance appears to be around 50 ohms. Once you have it mounted and connected to your radio slide the center conductor clamp up or down and note the SWR reading. If the SWR cannot be lowered to the desired reading you may have to cut or lengthen the "A" section. Shortening the antenna will raise the resonate frequency. Experiments have shown that it is possible to get a 1:1 reading with this antenna.


Enter the Operating Frequency
for your JPOLE antenna.

 Freq. Mhz
Below calculations are for surface to surface.
A is  feet  inches
B is  feet  inches
C is  feet  inches
D is  feet  inches

The above calculator is available for your quick reference calculating.

purchase the fittings by the bag, it’s……………….cheaper.
 
Popular Antenna Books & Links
Members Choice
1.The ARRL Antenna Book
2.Our Popular Links Page
3.The ARRL Antenna Book
 Fundamental Note

One of the most important factors in any Amateur Radio project is the SAFETY of all persons involved. Please use care and good practices. We want to hear about your success, not read about you.