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Noise reduction on 40m


Radiation from power lines, data lines and so on in the antenna, I tried to cut into this noise and for this I inserted two common mode inductors in the power line
post 27 Mar 2024
Noise reduction on 40m

Antenna 40 Meter Links

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Antenna for 40m
The installation of my half-wave antenna for the 40m band. The tuning system is installed at the top of the attic

Capacitive Antennas 7.050 - 3.550 MHz
The capacitive antenna is a very space-saving antenna with good receivings caracteristics for the interior also for sending with 100 Watts

Dipolo para 40 80 metros
This dipole antenna for the 40 and 80 meter bands has good performance and is simple to build

Dipolo rotativo para hf
When it comes to dipoles, we wonder how efficient

Antenne verticale monobande 7Mhz


Linear-loaded-short-dipole-21mhz

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

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

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