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

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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Pin On Antennas

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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

Shield attaches to the short section feed point.

Roll up j pole antenna plans.

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. Coax center conductor attaches to the long section feed point. Since it is the second version of this antenna i call it the dbj 2. Try adding a balun to the coax.

When rolled up it is an extremely compact pocket sized antenna. 3 ounces compact and effective. 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. What can i do.

36 dbj 2 commercial dual band roll up antenna kit 152 157 mhz and 460 470 mhz. Principles of the dbj 1 the earlier dbj 1 is based on the j pole 2 shown in figure 1. Save time by using the calculator below. The slim jim designed by the late fred judd g2bcx can be a great portable roll up antenna if made out of 300ω or 450ω ladder line twin feeder.

To a portable roll up antenna. This simple antenna lends itself well to emergency use or as a portable antenna for hotel room operations while traveling. Add a loop of string to the top and hang it on a tree branch use it with your handheld transceiver then roll it up. To wit figure 3 shows the e plane gain along the plane through the roll up j antenna and the mast of figure 2.

Dbj 2 ham dual band roll up antenna kit 144 148 mhz and 440 450 mhz includes adapters for bnc sma and sma female. Includes adapters for bnc sma and sma female. Enter the operating frequency. This calculator can be used to design a slim jim or a j pole antenna.

A balun is necessary because a j pole antenna uses a balanced feed the. A portable vhf uhf roll up j pole antenna for public service edison fong wb6iqn. J pole antenna design. Fong us patent 8 947 313 radial free ollinear.

Fong us patent 9 608 336 radial free ollinear omni directional triband antenna edison fong august 25 2015. Also includes a 6 ft extension cable. 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. The 2 meter roll up j pole is lightweight approx.

There are several features which make the ubiquitous twinlead j pole antenna a good addition to your emergency grab n go kit. Maximum power input 50 watts. Design your j pole for hf 2 meters 220 440 and up. 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.

A portable vhf uhf roll up j pole qst march 2007 vol.

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

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

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

Pin Pa Ham Antenna

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

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

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

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Sign In Ham Radio Antenna Ham Radio Shortwave Radio

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Pin On Ham Radio

Pin On Ham Radio

Slim Jim Vs J Pole Antennas Kb9vbr Antennas Ham Radio Antenna Antennas Ham Radio

Slim Jim Vs J Pole Antennas Kb9vbr Antennas Ham Radio Antenna Antennas Ham Radio

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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Pin En Ondas

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

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

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Pin On Antenne

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Pin On Amatuer 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

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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Pin By Kelvin On Antennas Antenna Antennas Ham Radio Antenna

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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