Richmond Amateur Radio Club

Designing and Constructing Magnetic Loop Antennas

Two presentations, one by John DeMajo, K5HTZ, and a second by Ken Zutavern, K4ZUT, at the 10 January 2020 RARC club meeting are outlined here.

John DeMajo Mag Loop presentation

John‘s presentation is available by clicking this link: loop-antenna-project

John’s spreadsheet calculator is at mag_loop_calculator.

Ken showed another design that used a hand-wound toroid transformer instead of a small loop to feed the large loop.

K4ZUT toroid transformer and motor-driven capacitor tuning

Ken’s loop also used a motor to turn the tuning capacitor. This allows him to locate the loop away from his operating position. at new hosting site

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Ham Radio Launched on Balloon

Four cars of hams chased a balloon carrying APRS and launched from Franklin Military Academy, a Richmond city school. KN4CZZ, chemistry teacher at the school led this, his second launch from the school. This time he used APRS and got lots of hams to chase with him.

All but two of the chase team holding the prey on a country road in New Kent County near Providence Forge

Track from APRS.FI

It didn’t go far but it went high, 84,000 feet.

Checking the lift just before launch.