Top Loaded Vertical Antenna

Specifications

glenn5
NoBandTelescopic
Inchs
Telescopic
mm
Coil LthDiaCoil TurnsInductanceCenter
Frequency
Reactance
1 623.255904519153.5μH51.500Mhz1133Ω
2 1013 3306519174.0μH28.750Mhz723Ω
3 2015.2538575195718.0μH14.735Mhz1666Ω
4 4019.54851402412767.0μH7.097Mhz2988Ω
5 8024.559020032190180.0μH3.640Mhz4117Ω


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Calculating Inductance and Reactance

Inductance of an Air core coil inductor:

L = (D/10)2*n2/(4.5*D+10*l)

Where,

L = Inductance of the coil in μH
n = Number of turns of winding,
D = diameter of the coil (diameter of the former) mm
l = Length of the coil in mm.

Calculating Reactance at the Center Frequency:

XL = 2π𝒇L or ωL

Where,

𝒇 = Frequency
L is the inductance in HENRYS.
2πƒ or ω = the angular velocity

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Magnetic Base



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No. 1 - 6 Meter (50Mkz) Coil Assembly

coil1-06m.jpg

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No. 2 - 10m (28.750Mhz) Coil Assembly

coil1-06m.jpg

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No. 3 - 20m (14.735Mhz) Coil Assembly

coil1-06m.jpg

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No. 4 - 40m (7.097Mhz) Coil Assembly

coil1-06m.jpg

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No. 5 - 80m (3.640Mhz) Coil Assembly

coil1-06m.jpg

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Glenn Lyons VK4PK
glenn@LyonsComputer.com.au
Ver:gnl2020mmdd - pre published v0.9