Roll Up J Pole Antenna Plans

I Ve Constructed A 144 440 Dual Band Open Stub J Pole Antenna I Saw The Plans For This On The Internet Link To Plan Ham Radio Antenna Ham Radio Radio Antenna

I Ve Constructed A 144 440 Dual Band Open Stub J Pole Antenna I Saw The Plans For This On The Internet Link To Plan Ham Radio Antenna Ham Radio Radio Antenna

450 Ohm Slim Jim Antenna Project By Ke4nu Ham Radio Ham Radio Antenna Slim Jims

450 Ohm Slim Jim Antenna Project By Ke4nu Ham Radio Ham Radio Antenna Slim Jims

How To Support The Portable Roll Up 450 Ohm Slim Jim Antenna For More Permanent Use Outside By N4ujw Ham Radio Ham Radio Antenna Antenna

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J Pole Diagram Dipole Antenna Ham Radio Home Brewing

J Pole Diagram Dipole Antenna Ham Radio Home Brewing

J Pole Diagram Dipole Antenna Ham Radio Home Brewing

Coax center conductor attaches to the long section feed point.

Roll up j pole antenna plans.

When rolled up it is an extremely compact pocket sized antenna. This calculator can be used to design a slim jim or a j pole antenna. J pole antenna design. 91 no 3 pp.

This simple antenna lends itself well to emergency use or as a portable antenna for hotel room operations while traveling. Dbj 2 ham dual band roll up antenna kit 144 148 mhz and 440 450 mhz includes adapters for bnc sma and sma female. A portable vhf uhf roll up j pole qst march 2007 vol. A portable vhf uhf roll up j pole antenna for public service edison fong wb6iqn.

To a portable roll up antenna. To wit figure 3 shows the e plane gain along the plane through the roll up j antenna and the mast of figure 2. I built the dual band j pole antenna from the article in the september 1994 new ham companion an easy dual band vhf uhf antenna page 61 but i just can t get it to work. What can i do.

Save time by using the calculator below. 3 ounces compact and effective. Also includes a 6 ft extension cable. Since it is the second version of this antenna i call it the dbj 2.

Fong us patent 8 947 313 radial free ollinear. 36 dbj 2 commercial dual band roll up antenna kit 152 157 mhz and 460 470 mhz. Includes adapters for bnc sma and sma female. A balun is necessary because a j pole antenna uses a balanced feed the.

Shield attaches to the short section feed point. Figure 3 ladderline j pole with and without feed line choke for the purists and since it matters in this discussion the view above is from the other side of figure 2 antenna and feed line are to the right of the mast. Fong us patent 9 608 336 radial free ollinear omni directional triband antenna edison fong august 25 2015. There are several features which make the ubiquitous twinlead j pole antenna a good addition to your emergency grab n go kit.

Enter the operating frequency. Design your j pole for hf 2 meters 220 440 and up. Try adding a balun to the coax. The antenna can be set up quickly and easily by hanging out a window attach to a ceiling or toss a lead sinker over a tree branch with kite string and hoist it up.

The 2 meter roll up j pole is lightweight approx. Unlike the popular ground plane antenna it doesn t need ground the dbj 2. Principles of the dbj 1 the earlier dbj 1 is based on the j pole 2 shown in figure 1. Ed fong wb6iqn also makes good roll up dual band j poles available here the dual band open stub j pole antenna built out of heavy duty 3 16 angle aluminum uhf so 239 connector with 3 8 aluminum elements and all stainless steel hardware.

Maximum power input 50 watts.

J Pole Antenna Handbook Home Page Ham Radio Antenna Ham Radio Radio Antenna

J Pole Antenna Handbook Home Page Ham Radio Antenna Ham Radio Radio Antenna

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Pin On Ham

Vhf Uhf Slim Jim J Pole Dual Band 2m 70cm Antenna Jpole Dual Band Slim Jims Band

Vhf Uhf Slim Jim J Pole Dual Band 2m 70cm Antenna Jpole Dual Band Slim Jims Band

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Diy 2m Slim Jim J Pole Antenna Slim Jims Ham Radio Tv Antenna

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Pin Pa Ham Antenna

Copper Cactus Dual Band J Pole Antenna Plans N7qvc S Ham Shack Radioamador

Copper Cactus Dual Band J Pole Antenna Plans N7qvc S Ham Shack Radioamador

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70mhz Slim Jim Half Wave Vertical Built With 450w Feeder Ham Radio Slim Jims Ham Radio Antenna

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Roll Up Slim Jim Antenna For Emergency Preparedness Communication Review Coach Helder S Survival Gear Reviews Ham Radio Ham Radio Antenna Radio

Roll Up Slim Jim Antenna For Emergency Preparedness Communication Review Coach Helder S Survival Gear Reviews Ham Radio Ham Radio Antenna Radio

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I Ve Constructed A 144 X2f 440 Dual Band Open Stub J Pole Antenna I Saw The Plans For This On The Internet Link To Ham Radio Antenna Ham Radio Radio Antenna

I Ve Constructed A 144 X2f 440 Dual Band Open Stub J Pole Antenna I Saw The Plans For This On The Internet Link To Ham Radio Antenna Ham Radio Radio Antenna

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Pin On Kd9kzw

Details About Dbj 2 Vhf Uhf Dual Band Roll Up Portable Antenna Dual Band Antenna Ham Radio Antenna

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Deluxe Model Roll Up 2m 70cm Roll Up J Pole Slim Jim Antenna With 10ft Coax Ebay Ham Radio Slim Jims Noaa Weather Radio

Deluxe Model Roll Up 2m 70cm Roll Up J Pole Slim Jim Antenna With 10ft Coax Ebay Ham Radio Slim Jims Noaa Weather Radio

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Deluxe Model Roll Up 2m 70cm Roll Up Antenna With 10ft Coax J Pole Slim Jim With Images Slim Jims Roll Up Antenna

Deluxe Model Roll Up 2m 70cm Roll Up Antenna With 10ft Coax J Pole Slim Jim With Images Slim Jims Roll Up Antenna

Nt1k Jpole Page 001 Aluminium J Pole Antenne Pinterest Metal Fabrication

Nt1k Jpole Page 001 Aluminium J Pole Antenne Pinterest Metal Fabrication

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