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Butternut HF2V Modeling
I started by modeling the basic (80m, 40m) antenna; below are some results from MMANA assuming an antenna length of 10m
post 04 Dec 2024
Antenna Vertical Links →
Antenne verticale raccourcie pour le 14 et 28 MHz
Antennas of this type, to have a high efficiency, all needed an excellent grounding or a counter weight in the form of radians
Antenna verticale per hf non accordata
Elettricamente si tratta di una 5/8 per la gamma CB, dunque e' utilizzabile cosi' com'e sia in 27 sia in 10 metri, accorciandola leggermente
Antenne verticale 5/8 de lambda
Compared to the lambda / 4 antenna the 5/8 antenna has a gain of about 3dB, which is not negligible for an omnidirectional antenna
184
Antennas of this type, to have a high efficiency, all needed an excellent grounding or a counter weight in the form of radians
Elettricamente si tratta di una 5/8 per la gamma CB, dunque e' utilizzabile cosi' com'e sia in 27 sia in 10 metri, accorciandola leggermente
Compared to the lambda / 4 antenna the 5/8 antenna has a gain of about 3dB, which is not negligible for an omnidirectional antenna
Antenna splitter per VHF-UHF per quattro ricevitori Chi dispone di una sola antenna e vuole collegarvi più di un ricevitore necessità di uno splitter
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