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Multiband vertical
10 meters of vertical that makes for a handy 1/4 wave for 40m, 30m, 20m, 17m
post 09 Feb 2024
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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
81
Disarming simplicity and an efficiency that is nothing short of incredible
This calculator requires the use of Javascript enabled and capable browsers
With the help of the K7MEM site I learned that the dipole would be about 12 meter long
The article is an analysis of an antenna trap where a coil is formed of a length of coax cable
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
Linear loaded short dipole 21Mhz For my amateur radio activities on the HF bands I only have a 3.6 m wide balcony available for antennas. After some study I decided to experiment with a shortened dipole for the 15 m band
Rx antennas 4Square Rx Vertical Array My frequency design of 1.825 MHz a 90 degrees line would be 33,70 metersinstead of the previously calculated 33,27 m
Atu balanced feeder antenna system An ATU has the advantage of bringing the feeder-antenna system to resonance, act as a band pass filter both on receive and transmit and a low SWR