A phased antenna system with 3 dB more gain

3 element yagi for 11meter with control swr system harpin

This two-elements antenna is cubical quad antenna is designed for use on either the 10-meter ham band or the 11-meter citizen's band

Per vhf e uhf e per tutte le altre bande

Dipole copper the quality of different wires and metals for antenna and the bare copper was the best

Constructed using PVC tubing or water pipe which is available from most hardware stores,driven element 215 cm,director element 206 cm

This antenna is very simple, but it is effective and whoever makes it can be impressed by the performance it will experience

For 27.5 Mhz: lambda=10.9091 m 1/2 lambda /100=5.5 cm B=73.64 cm
| A=68.18 cm |->Initial values The 'H' Aluminium made

Ed ecco riapparire la vecchia e gloriosa Zeppelin che con le dovute modifiche

L'antenna descritta è una antenna ad elevato guadagno, facile da realizzare e da trasportare, quindi molto adatta per stazioni speciali o portatili
The described antenna is a high gain antenna, easy to make and transport, therefore very suitable for special or portable stations

An antenna for the 11 meters in the attic

A simple dipole antenna,the wire size can range from 16 awg to 12 awg, the larger the wire, the wider the bandwidth

An antenna that takes up little space

Utilizzeremo il programma di modellazione di antenne gratuito 4NEC2

Calulator for quad 2 element quand for 27 MHz antenna

A vertical polarization antenna with high efficiency and as small as possible

The values indicated are calculated for 27 MHz, the popular and authorized frequency

The antenna is fastened onto a wooden or plastic former to ensure that the operator ts head-body does not influence any antenna parameters

Antenna, shown in the picture, is characterized by simplicity and easy realizability, it occupies a minimum area of height slightly over 1.5 meters

Used for a planar dipole in the yagi-uda antenna

The basic type of antennas in general is the so-called half, ie the half-wavelength antenna, its length is quite considerable for CB 5.37 meters

Scheme and measurements for a hb9cv antenna for 27 MHz

The HB9CV antenna is smaler than a 3el. conventional Yagi but you get the same gain and caracteristics

The expression city band, often used also in the English version citizens' band, abbreviation CB, identifies a band of radio frequencies around 27 MHz

The transformer is made of 3 copper lines on a PCB, each of them 65mm long

One of the easiest antennas to build is a traditional half-wave dipole

SWR meter shows you how well your coax, antenna mount, ground plane and antenna match the output capability of your CB radio

Stick the RG-58cable in the middle of the feeder cable, with careful construction adjustment, a SWR of 1.3 can be achieved

The antenna shown in fig. 1 is a four elements long yagi, at 12 meters above the ground,the boom is 5.90 meters long and the feeding system is a common gamma match

Feeding is done directly with 50 ohm coke without e.g. 1/4 wave 75 ohms

Variable capacitor that we used it makes exactly 50 pf brand arena, axis on 5 / 10th mm inter-blade ball bearing, the coverage of the antenna ranges from 52 to 24

I originally used this antenna on the 28 MHz amateur band, but here I describe its modification

20 meter helix antenna, the antenna is approximately 65 turns of #14 awg thhn stranded wire wound on a 1 1/2'' cpvc coil form

Antenna Quad 5 element for 27,500 MHz boom long 6,70 m ,again 15 db

It is not always easy to fix a doublet between two high points in a clear place. One solution is to hang the center of the doublet as high as possible and anchor both ends

Antenna spiderman 4 element with scheme phot

It has a gain of 5 dB and an av / ar ratio of 25 to 30 dB,it is simple of construction and assembly, it weighs only 3 kg

The proposed model has a gain of 6.4 dBd at a 30-dB ratio at 27.550 MHz

Skypper antenna for 11 meter power rating 1,5 kW