Excel program of gene marcus w3pm gm4yre, the calculations give a propeller of 3 1/2 turns for 1g2 and for 2g4
post 17 May 2023
Excel file
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Helix antenna design and construction details
Design frequency MHz, Number of turns ,Turn spacing, wavelengths
Inductance of a Straight Wire, One End Grounded
Any length of wire has some inductance, however, at low frequencies, 1-30 MHz, the added effect of this inductance is usually minimum
J-Pole Antenna Calculator
If the antenna is to be placed outside, do not use brass, photo model designed for 2.45 GHz. A capacitor of 0.8 pF and it would be perfectly matched to 50ohm
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Design frequency MHz, Number of turns ,Turn spacing, wavelengths
Any length of wire has some inductance, however, at low frequencies, 1-30 MHz, the added effect of this inductance is usually minimum
If the antenna is to be placed outside, do not use brass, photo model designed for 2.45 GHz. A capacitor of 0.8 pF and it would be perfectly matched to 50ohm
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