Antena J Pole 144 Mhz

Ew8au j pole antenna 144 146 mhz ew8au antenna jpg.

Antena j pole 144 mhz. It is likely that any real world tests that show the slim jim to have better low angle. A loopy loop loaded vertical. A portable 2 element vhf yagi. Hasil dari percobaan saya adalah sbb.

Hidden and stealth antennas. Please try again later. 140 mhz swr 1 1 3 142 mhz swr 1 1 2 150 mhz swr 1 1 5 425. The tee had to but trimmed so i could get the proper spacing i added copper sweat to threaded couplers on the bottom so i could use some black pipe fittings and flanges for mounting.

There are many rumours on the internet claiming that the slim jim has better performance than the j pole. The 2 m j pole can be used on 70cm too with an swr 1 6. Slim jim vs j pole. Swr 145 146 mhz 1 5.

The j pole for vhf and uhf constructed with 240 ohm or 300 ohm twinlead. Osj model osj 146 440 dual band j pole with extra labor charge for two piece element will also fit in the antenna bag if all the elements are removed from the bracket osj business band marine band murs 150 162 mhz. Assembling gap titan dx antenna. Building and tuning 2 meter 144 mhz copper j pole.

Dual band 144 440 mhz j pole balum it has been suggested that the performance of 70cm on the dual band j pole can be enhanced by creating a 6 coil of 6 wraps just below the antenna. The lengths are for 145 mhz and 435 mhz. 144 mhz magnetic loop antenna. For 144 mhz i used 3 4 copper tubing for the main element and a 3 4 to 1 2 tee so i could use 1 2 inch tubing for the stub for 440 it s all 1 2 tubing.

John huggins kx40 covers this question on this page. I could have used galvanized but i plan on tack welding then. 144 430 dual band j pole antenna. The dimensions of a b and c are in the table below.

Sencilla antena j para 2 metros aislada de tierra fabricada con un caño de pvc de 40 mm x 2 mm de espesor de pared y caño aluminio de 9 5 mm. This feature is not available right now. 144 mhz swr 1 1 1 148 mhz swr 1 1 3 430 mhz swr 1 1 2 435 mhz swr 1 1 440 mhz swr 1 1 2 diluar band amatir yb. Simulation and common sense suggests that they are practically identical.

Berdasarkan beberapa referensi dari internet saya mencoba untuk membuat j pole antenna yang cocok untuk band di yb. Pfeiffer maltese quad.