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70cm mixed mode helix
The turns of copper pipe are held in place by a single turn of thin copper wire wrapped around the pipe and soldered close to the plastic pipe
post 10 Sep 2024
Antenna for UHF VHF Links →
70cm-Longyagis in 28Ohm
The elements have 10 mm, 8 mm or 6 mm diameter, because this is very uncritical and you get the expected datas! For the tuning let the radiator 2mm longer and cut for best SWR at 432 MHz
900 MHZ Quagi beam
The quad elements were made from #11 AWG copper rewind wire and the directors were made from .063 diameter brass welding rod
Yagi for 432 MHz
Frequency of 432 mhz,9 director elements, for a total of 11 elements
A 2-Meter Phased-Array Antenna
a small vertical phased array that can easily be built and cost is minimal is taken from an article in QST
Antena Doble Bazooka para 2 metros
Antenna built with coaxial cable, measures from the formula 158.9 / F, total length, 99.6 / F length of the coaxial cable
154
The elements have 10 mm, 8 mm or 6 mm diameter, because this is very uncritical and you get the expected datas! For the tuning let the radiator 2mm longer and cut for best SWR at 432 MHz
The quad elements were made from #11 AWG copper rewind wire and the directors were made from .063 diameter brass welding rod
Frequency of 432 mhz,9 director elements, for a total of 11 elements
a small vertical phased array that can easily be built and cost is minimal is taken from an article in QST
Antenna built with coaxial cable, measures from the formula 158.9 / F, total length, 99.6 / F length of the coaxial cable
Antenna splitter per VHF-UHF per quattro ricevitori Chi dispone di una sola antenna e vuole collegarvi più di un ricevitore necessità di uno splitter
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