3 element Yagi antenna 50-MHz 2 meters

4 elements yagi antenna for experimentation in 50,110 MHz, 6 meter band

The dimensions for a centre frequency of 50.150 MHz

Hentenna has 3dBd gain with the unit as allowed. And it wins by 2 dB compared to the simple quad a loop element

This article is intended as an introduction to practical examples of designs for 45-70 MHz band 1 TV DX aerials. The designs range from a simple dipole, to a 5 element yagi

Is a big antenna and needs to be constructed like a battleship or it will not survive the high winds

The matching circuit is the same as above with the following components, C 1 = 20 - 110 pF, variabel Mica capacitor,C 2 = 2 - 15 pF, variabel foil capacitor

The 50MHz-Yagis are designed with an impedance of 12.5 Ohm or 28 Ohm and some types with 50 Ohm impedanc

The Hentenna can be changed from a bidirectional antenna to an interesting directional antenna

A 2m square dipole, made from copper plumbing fittings and 1/2 inch copper water pipe

The vertical is loaded from the bottom with a coil wound on a previous block

The 6 meter loop is small enough to erect a form around it and I have done this with 1/2" electrical pvc schedule 40 pipe with dowel inserted inside for extra strength

The matching circuit is the same as above with the following components,C 1 = 20 - 110 pF, variabel Mica capacitor,C 2 = 2 - 15 pF, variabel foil capacitor

The dipole can consist of two short copper wires or a length of 7.62 cm both for a total of 6 inches

8 element, 41 foot boom, mounted at 87 feet. 14.0 dBi gain, homebrew design

Una canna da pesca lunga m.4,5. in configurazione jpole per i 50 Mhz, in questo caso è stato impiegato filo di rame nudo rigido di diametro 1,5mm. sez. 1,8 mm 2

Some bicycle spokesi made this 15 element LPDA for UHF and L-band satellite service

L'antenna è ottimizzata per il massimo guadagno e rappresenta il massimo che può essere ottenuto con un boom di soli 0,4 lambda

This antenna is a beam but it allowed me to make numerous contacts

Bicycle-Rim Magnetic Loop for 6m

Here are two yagis for 6m, one 1 wavelength long with a gain of 9.5dBd, and the other a 2.1wl model with a gain of 11.8dBd

This is a very simple antenna consisting of an antenna whip of 1/4 wavelength and a tube of 1/4 wavelength

Ddrr stands for directional discontinuity ring radiator a short, vertical monopole antenna connected to a transmission line

Collegate la trecciola con il cavo a 75 ohm con funzioni d'adattamento d'impedenza da 100 a 50 ohm circa

All you need is a 6.2m of flexible wire, 1.1m of 75_ohm coax, some electrical connector blocks and a length of rope to hang it from

Realizzazione di una delta loop per i 6 m

In this setup have a horisontal polarisation the total length of the wire is 6,10 mete

The circumference of the loop is 6,1m wire, connected in this way, it is vertically polarized

The hentenna performs better than my commercial al-pipe dipole, moreover it is easier to transport and/or store anyway

La realizzazione è molto semplice, ed il funzionamento immediato, nella mia realizzazione ho impiegato interamente materiale di recupero

A double dipole fixed on a boom in the shape of h, which i will call cell, each element 2 per cell is controlled by gamma match synchronized using a phase shift line

Six element antenna. gain is about 0,6 db higher, but the main optimization is the front/back ratio

The x-beam was originally intended as an HF mono-band beam, i used the formulas to build it for 6m

Building this four elements yagi for 430-440mhz, to use it this summer in portable operation

L’alimentazione avviene direttamente con coax 50 ohm fissato con 2 capicorda alle viti prossimali di fissaggio del dipolo al supporto isolante