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Build an antenna for 40 and 80
The solution build an antenna for 40 and 80. The roof on the building is not that big that I could install a full size dipole or inverted V
post 20 Apr 2024
Coils Traps Antennas Links →
An Attic Coaxial-Cable Trap Dipole for 10, 15, 20, 30, 40, and 80 Meters
A coaxial-cable trap dipole antenna installed in the attic provides a surprisingly effective solution to HF
Simple Building and Tuning of Traps
Traps are useful for multiband operating of all kinds of antennas
40 & 80 meter trap dipole
Coil 78 turn of insulated copper Wire no spaced
Coaxial Traps Grid-dip meter method
A trap is a parallel resonant circuit network that can perform either of two functions in an antenna system
Coil Design
The coil design is one of the most difficult and important parts of the coilgun
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A coaxial-cable trap dipole antenna installed in the attic provides a surprisingly effective solution to HF
Traps are useful for multiband operating of all kinds of antennas
Coil 78 turn of insulated copper Wire no spaced
A trap is a parallel resonant circuit network that can perform either of two functions in an antenna system
The coil design is one of the most difficult and important parts of the coilgun
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
A simple SWR Meter is to be used at HF An SWR meter provides information about how well matched is your antenna with the transmitter and how well power is being radiated