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Dual Alford Slot Antenna
Dual Alford Slot antenna was first introduced by Andrew Alford in 1946
post 02 Nov 2024
Antenna for UHF VHF Links →
VHF-UHF Yagi Antenna Feed Design
Balanced feed line are readily available in various impedances 75/300/450 ohms, but the use of a balanced feedline presents some physical requirements that are not easy to get around
Yagi 7 el. Per 70 cm. Ecologica
La lunghezza totale del boom e' di circa 1m. poiche' dietro al riflettore e' previsto il fissaggio al mast. La sezione e' 1 x 2 cm
Yagi 9 elements
The first director can be moved forward or backward to search for the best ROS
6-Element yagi for 144 MHz
The design has been performed using yagimax2 software and practical tests. I created several prototypes before I found out the correct measurement
7 Elements Yagi for 146Mhz
7 Elements yagi configured in vertical 2 stacked antenna tuning
150
Balanced feed line are readily available in various impedances 75/300/450 ohms, but the use of a balanced feedline presents some physical requirements that are not easy to get around
La lunghezza totale del boom e' di circa 1m. poiche' dietro al riflettore e' previsto il fissaggio al mast. La sezione e' 1 x 2 cm
The first director can be moved forward or backward to search for the best ROS
The design has been performed using yagimax2 software and practical tests. I created several prototypes before I found out the correct measurement
7 Elements yagi configured in vertical 2 stacked antenna tuning
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