Top Loaded Vertical Antenna
Specifications
| No | Band | Telescopic
Inchs | Telescopic
mm |
Coil Lth | Dia | Coil Turns | Inductance | Center
Frequency | Reactance |
| 1 | 6 | 23.25 | 590 | 45 | 19 | 15 | 3.5μH | 51.500Mhz | 1133Ω |
glenn5
| 2 | 10 | 13 | 330 | 65 | 19 | 17 | 4.0μH | 28.750Mhz | 723Ω |
3 | 20 | 15.25 | 385 | 75 | 19 | 57 | 18.0μH | 14.735Mhz | 1666Ω |
| 4 | 40 | 19.5 | 485 | 140 | 24 | 127 | 67.0μH | 7.097Mhz | 2988Ω |
| 5 | 80 | 24.5 | 590 | 200 | 32 | 190 | 180.0μH | 3.640Mhz | 4117Ω |
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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
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No. 2 - 10m (28.750Mhz) Coil Assembly
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No. 3 - 20m (14.735Mhz) Coil Assembly
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No. 4 - 40m (7.097Mhz) Coil Assembly
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No. 5 - 80m (3.640Mhz) Coil Assembly
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Glenn Lyons VK4PK
glenn@LyonsComputer.com.au
Ver:gnl2020mmdd - pre published v0.9