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20-Meter JPole Vertical
JPole antenna is for the top section to be 1/2 wave radiator with a 1/4 wave matching section for the feed. The bottom of the feed section is actually a shorted 1/4 wave autotransformer
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
180
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
PSION Greyline Clock PSION Greyline Clock v. 1.0 is a UTC/Local clock showing sunlight/darkness area on the world map
Radioassistance Radioassistance E Kenwood Dealer, vendita ricetrasmittenti, antenne, parti di ricambio, elettronica
SunCalc SunCalc - sunrise, sunset, shadow length, solar eclipse, sun position, sun phase, sun height, sun calculator, sun movement, map, sunlight phases, elevation, Photovoltaic