Hits
The double turnstile antenna
All the elements are driven via a phasing/impedance matching harbness. This makes construction easy as all the elements are the same length
post 19 Dec 2024
Antenna for UHF VHF Links →
Building UHF Antennas
His method of construction can be used on most UHF through "low" microwave Yagis, and is especially useful for the 33, 23 and 13 cm bands
Build a 2m 8db collinear for £20
I started to build the antenna by cutting four lengths of wire, the measurement is 38.75ins for a half wave 145mhz but I cut them at 39.75ins
HB9CV 144mhz
Symmetrical model, 75 ohm asymmetrical model
150
His method of construction can be used on most UHF through "low" microwave Yagis, and is especially useful for the 33, 23 and 13 cm bands
I started to build the antenna by cutting four lengths of wire, the measurement is 38.75ins for a half wave 145mhz but I cut them at 39.75ins
Symmetrical model, 75 ohm asymmetrical model
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