Magloop 160 to 20 meters (TX 40 to 20), Dipole 80 to 40; Moxon 20 to 10.
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- เผยแพร่เมื่อ 9 ต.ค. 2024
- Magloop 180 to 20 meters. Transmit 40 to 20.
Features:
40 to 20 meters with less than 1:1.2 SWR for TX
Remote controlled air capacitor with 5rpm motor with 4:1 gear reduction and speed controller.
Switch for 180 meters and 80 meters (RX only). Capacitors rated for 2kV
Parallel loops 13 cm apart from each other.
Diameter of loops 126 cm
Material: Shorted Coax
Moxon 20 to 10 meters
Height: 13 meters
5rpm rotor self made
Camera for orientation
SWR: less than 1.5:1 in all bands
Awesome antenna
Dipole 80 to 40 meters, shortened on 80 and vertical L configuration
Length 20 meters for 40 m
Two 100 ųF capacitors at end of 40 meter antenna with 1.5 meter vertical L wire drop
Excellent TX and DX
Comercial GP80 antenna
Very low Q from 40 to 6 meters
A bit noisy and not good compared to MOXON and Dipole.
Controllers
9 to 12 volt
Two speed controllers one for antenna rotor another one for air capacitor ($6 each), motors are 5rpm ($10 each)
Antenna switch kit was around $30, 9 to 12 volts. Well made, insignificant SWR change.
KO6DEV
73
Amazing
Total cost? Time and effort? Plans? Good performance a day results?
73
I made a mistake and said microhenries instead of ųF (microfarards); and I said kilowatts instead of kilovolts. Sorry, it was too early in the morning.
I used this Magloop calculator:
miguelvaca.github.io/vk3cpu/magloop.html
If you go to qrz.com and look me up, KO6DEV, you will see the costs. The Magloop is less than $100, the Moxon is less than $250 (rotor included) the dipole for 80 to 40 is $10 or less. The antenna switch is around $30, and it’s a kit.
So, I am saving hundreds, if not thousands of dollars.
Advise: build and experiment.