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2m-70cm quadrifilar helical antennas

2m-70cm quadrifilar helical antennas
    Build a pair of QHAs, one for 2 meter and one for 70 cm. A diplexer is of course needed to connect both to the single antenna connector of a dualband radio
post 31 Dec 2024



Helix Antennas Links

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Antenne helicoidale 2.4 GHz
2.4 GHz antenna design ideal for amateur satellite communications

Helix 2.425 GHz band
Broad bandwidth in the 2.425GHz band

circularly polarized antenna software
Software for calculator helix antenna

Detalles de diseo y construccion de una antena helicoidal
Here is a page with images of a 3-turn helicoid that was built for a reception system in the 1690 MHz band


Psion ham software

PSION Greyline Clock PSION Greyline Clock v. 1.0 is a UTC/Local clock showing sunlight/darkness area on the world map

Radioassistance

Radioassistance Radioassistance E Kenwood Dealer, vendita ricetrasmittenti, antenne, parti di ricambio, elettronica

SunCalc

SunCalc SunCalc - sunrise, sunset, shadow length, solar eclipse, sun position, sun phase, sun height, sun calculator, sun movement, map, sunlight phases, elevation, Photovoltaic