Hits
The normal-mode helix antenna
A helix will work in the normal mode when the diameter and pitch of the helix is less than 0.1 Lambda When working in this mode the radiation is from the side of the helix, and when the diameter is considerably less than 0.1? the resultant 'spring' has a radiation pattern similar to a short vertical monopole or whip
post 19 Dec 2024
Antenna for UHF VHF Links →
La pounder de 144 MHz
the pounder is a directional antenna for the 2-meter band, which provides a theoretical gain of 7.2 dBi and an F / B of over 20 dB
La QUAGI 144mhz 1200 antenne miracle
An 8-element quad antenna is tedious to build, the tiles being awkward to fix on the boom and to manufacture. On the other hand, from 3 or 4 elements, the difference between the quad and yagi fades.
Piccola HB9 per VHF
Costruita con uno scatolato di alluminio, dalle dimensioni di 23,5 X 23,5 millimetri con uno spessore di 1 millimetro
Semplice collineare per i 145 Mhz
La taratura dell'antenna E' semplice, basta spostare i collarini avanti o indietro a seconda delle misurazioni del rosmetro
150
the pounder is a directional antenna for the 2-meter band, which provides a theoretical gain of 7.2 dBi and an F / B of over 20 dB
An 8-element quad antenna is tedious to build, the tiles being awkward to fix on the boom and to manufacture. On the other hand, from 3 or 4 elements, the difference between the quad and yagi fades.
Costruita con uno scatolato di alluminio, dalle dimensioni di 23,5 X 23,5 millimetri con uno spessore di 1 millimetro
La taratura dell'antenna E' semplice, basta spostare i collarini avanti o indietro a seconda delle misurazioni del rosmetro
Ferrite Shop Ferrite-shop on-line shop, cable clamps,toroids, cable cores, technic,ferrite material choice
Amateur radio kits by Kanga US
50MHz to 28MHz RX Converter The concept of the rx converter is quite simple and nothing really new. the local oscillator is a standard colpitts crystal oscillator producing the 22mhz lo signal