4:1 coax balun design Calculator

Here we calculate the half wave length of the matching section of the 4:1 coax balun. Again the equations are taken from the ARRL Antenna Book
post 06 Feb 2024
4:1 coax balun design Calculator

Toroid & balun Links


Balun un-un
Il diametro di ogni singolo conduttore rosso o nero e' di 2 mm plastica compresa, e di 0.75 mm senza isolante plastico

For some so-called baluns, no throttling action or effect against common-mode currents will be measurable. This means that sheath waves occur and the coaxial cable outer screen acts as an antenna. Domestic interference fields penetrate unhindered over the alleged balun in the receiver

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Enter the frequency of operation and the balanced and unbalanced Z0.Values for L and C will be calculated

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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

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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