Hits
Simple 1 Element Yagi
The dipole is mounted vertically 250mm in front of a metal support, the gain is 2,65dBd at 5,5dB F/B
post 28 Feb 2024
Antenna for UHF VHF Links →
Antenna HALO per i 70 mhz
L’alimentazione avviene mediante il sistema denominato gamma-match con il condensatore
Antenna quad 144 MHz
Versione da appartamento leggermente modificata a 6 elementi con guadagno teorico di 13 Db
Antenna HALO
A halo antenna, or halo, is a horizontally polarized, omnidirectional 1⁄2 wavelength dipole antenna, which has been bent into a loop with a small break on the side of the loop directly opposite the feed point
Antenna Yagi 1240 Mhz
Yagi for the 23 cm band drawing by DL9AQ
Antenne big-whell
Consists of three full-wave horizontal loops similar to a clover
155
L’alimentazione avviene mediante il sistema denominato gamma-match con il condensatore
Versione da appartamento leggermente modificata a 6 elementi con guadagno teorico di 13 Db
A halo antenna, or halo, is a horizontally polarized, omnidirectional 1⁄2 wavelength dipole antenna, which has been bent into a loop with a small break on the side of the loop directly opposite the feed point
Yagi for the 23 cm band drawing by DL9AQ
Consists of three full-wave horizontal loops similar to a clover
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