[nrv-hams] Mag Loop Antenna Follow-up

[Cam Coble]

As a follow-up to the antenna show-n-tell, I wanted to provide some
resources and information in regards to the magnetic loop antenna.

Two mentioned informative videos:
Jeri Ellsworth - AI6TK
Magnetic Loop Antenna Current and Voltage Distribution
https://www.youtube.com/watch?v=adJp1zO9qfo

Peter Parker - VK3YE
100 watt 7 MHz magnetic loop for units and apartments
Uses blank copper boards for variable capacitor
https://www.youtube.com/watch?v=Cv_RnLpZ9gw

A video about mag loop antenna height:
Kevin Loughin - KB9RLW
Magnetic loops and height. Do they change near to the ground?
https://www.youtube.com/watch?v=AWttibCYn1U


Calculator I used for my loop
http://www.66pacific.com/calculators/small-transmitting-loop-antenna-calculator.aspx

My specs are 9 foot loop circumference, 1" conductor, targeted for 14Mhz,
and 5 watts.
This calculated to the specs below. Note the high Q factor and RMS volts
generated from 5 watts (15.81 Vrms)!

Antenna efficiency: 59% (-2.3 dB below 100%)
Antenna bandwidth: 13.2 kHz
Tuning Capacitance: 65 pF
Capacitor voltage: 959 volts RMS
Resonant circulating current: 5.52 A
Radiation resistance: 0.048 ohms
Loss Resistance: 0.034 ohms
Inductance: 1.98 microhenrys
Inductive Reactance: 174 ohms
Quality Factor (Q): 1,059
Distributed capacity: 7 pF

Want to know more about the impact of the Q factor?
https://hamradioschool.com/antenna-q-factor/

Let me know if you decide to build your own! You may have some ideas I can
use ;)

Thanks and 73!
--
Cam - W4XXV