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Cubical quad 8 elements 144MHz
The 2.5m boom is a 20x35mm rectangular tube that is easily found in DIY store the distance between the reflector and the last director is 2.47m
post 04 Dec 2024
Antenna for UHF VHF Links →
Antenne Discone
Omnidirectional, vertically polarized and with gain similar to a dipole, it is exceptionally wideband, offering a frequency range ratio of up to approximately 10:1.
Build your yagi antenna 30 MHZ a 900 MHZ
This antenna is very adapted at VHF and UHF domain inside 30 MHZ to 900 MHZ
Dual bander handy yagi
The final design balances performance and size,the elements for both bands are interlaced and mounted in parallel
Design of matching transformers for 3 stacked Yagi antennas
3 vertically stacked antennas often represents a good compromise between increased antenna gain, mechanical feasibility and satisfactory handling
Portable Antenna Covers 6m-10m-11m-12m-15m-17m-20m
Mobile, Portable, Base station, Marine, EMCOMM, MARS/CAP, ARES, SATERN, RACES, First Responders, Emergency Preparedness, Skywarn, Military
155
Omnidirectional, vertically polarized and with gain similar to a dipole, it is exceptionally wideband, offering a frequency range ratio of up to approximately 10:1.
This antenna is very adapted at VHF and UHF domain inside 30 MHZ to 900 MHZ
The final design balances performance and size,the elements for both bands are interlaced and mounted in parallel
3 vertically stacked antennas often represents a good compromise between increased antenna gain, mechanical feasibility and satisfactory handling
Mobile, Portable, Base station, Marine, EMCOMM, MARS/CAP, ARES, SATERN, RACES, First Responders, Emergency Preparedness, Skywarn, Military
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