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Folded Dipoles for VHF/UHF Yagis
The folded dipole antenna consists of a basic dipole, but with an added conductor connecting the two ends together. This makes a loop of wire that is a short circuit to DC. As the ends appear to be folded back, the antenna is called a folded dipole antenna
post 22 Apr 2024
Antenna for UHF VHF Links →
Antenne folded 70cm 2mt
For 70cm 32,3 cm, for 2m 95,8cm
Antenne Speciali HF VHF UHF
In questa sotto pagina verra' illustrato come costruire antenne VHF per portatili
Antenne yagi 800 MHz 6 elements
This small antenna is intended for the short-range search of a radiosonde by listening to the harmonic 2 of the signal normally transmitted on 400MHz
Antennes Antenne Jupe 145 Mhz
The sleeve antenna can be considered as a ground plane antenna whose very large number of radians has been folded down along the coaxial cable to form a tube
VHF de 8 elementos
The table above shows the length of the elements in millimeters
155
For 70cm 32,3 cm, for 2m 95,8cm
In questa sotto pagina verra' illustrato come costruire antenne VHF per portatili
This small antenna is intended for the short-range search of a radiosonde by listening to the harmonic 2 of the signal normally transmitted on 400MHz
The sleeve antenna can be considered as a ground plane antenna whose very large number of radians has been folded down along the coaxial cable to form a tube
The table above shows the length of the elements in millimeters
23cm Yagi Antenna building Finished antenna at 1275 MHz SWR under 1:1.5 at resonant frequency
50 MHz preamp Gain 26dB with the BFG135 Preamps for 144 and 430 MHz, for 50 MHz, the BFG135a is a cheap transistor and in my view rather strong. It is not easily damaged by static discharge or RF power. FG connection
30 Volt Computer Power Supply Stack A bonus was that i discovered that these did not need a standby load connected to the supply to keep them running just apply mains power and close the Start lead to ground