Cut the tubing to the size shown for the desired band, the only section where size is not critical is the mast section, use any size you desire for mounting purposes

I decided to see if a J-Pole would operate well made out of stranded wire<

The gamma match consists of a 150mm length of 10mm aluminium tubing

First of all measure and cut the leader line, strip theends and solder it, do the same with RG-58 cable

Opinions are divided on Wireman slotted line and that is not without reason

Antenna j-pole Biband vhf-uhf photo demonstrations

The J-Pole antenna, in this design, the antenna is elevated at least 1/4 wavelength above ground, thus eliminating the ground losses

Calcolatore per antenna j-pole

The tuning is simple, unscrew nuts and move the clamps up or down until you get the SWR correct

Double band antenna for vhf j-pole 146 MHz 220-440 MHz

Il polo caldo andrà allo stilo medio e questo sarà isolato dal resto dell'antenna

j-pole antenna tuned for 89 Mhz in the broadcast band<

Una caratteristica particolare di questa antenna è quella di avere l'angolo d'irradiazione uguale a 0

It's a modified Slim Jim end fed aerial made out of 300-ohm ribbon feeder cable

A VHF/UHF base station antenna with λ/2 vertical performance on both VHF and UHF bands

A single band J-pole and dual band operation.In particular,a VHF and UHF antenna for the amateur band

Si tratta di un'antenna generalmente usata per le VHF, qualcuno, per le UHF. Raramente per le HF

The antenna’s 1/2 wavelength radiator,the lower section, Section B, is the 1/4 wavelength tuning stub

The two ends are connected together through the metal of the coax-socket

The following instructions may help you if you decide to try the Slim Jim antenna with aluminum tubing

Here's a neat little project that will prove useful for portable operation

Twinlead J-Pole, this simple antenna lends itself well to emergency use or as a portable antenna

The slim jim has more bandwidth or a wider range of frequencies than the jpole

The Folded Dipole Antenna, with balsa wood strips and epoxy resin for strength and protection, and the dipole was made from 1/16" diameter

All these dimensions can be extrapped to other frequencies,example for 70 CM 132/207 * 69 = 44 cm