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Trapped five band EFHW SOTA antenna


Trapped five band EFHW SOTA antenna

I have been using a 40m End-Fed Half Wave EFHW antenna very successfully for the last few months and I wanted to extend the design to multi-band whilst avoiding the need to take a tuner along

post 18 Dec 2024


Coils Traps Antennas Links

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Le mie sloper per 80/160 Lunghe solo MT. 17,50
Disarming simplicity and an efficiency that is nothing short of incredible

Jar Capacitance Calculator For Coils
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Build an antenna for 40 and 80
With the help of the K7MEM site I learned that the dipole would be about 12 meter long

Bootstrap coax traps for antenna
The article is an analysis of an antenna trap where a coil is formed of a length of coax cable

High-Q Coil Construction Techniques
n the past I used loading coils to improve the efficiency of a short dipole on 80m. The results, however, were disappointing. The main reason seemed to be the low Q factor of the coils


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