The 425 grams loop
This loop was develop to a plug and play operation and I
design a special ultra light variable capacitor with sliding
cooper printed circuit boards.
lower part of the antenna is covered by handles bike foam,
and a wood stick moves the sliding board adjusting the
resonant frequency by the command of the thumb.
same hand that holds this 425 grams antenna is the hand
t hat is used to tune, making the pedestrian operation a
Over the sliding part is a calibrated
frequency scale that gives instant view of the operation
On the top is a permanently soldered capacitor
connected to an alligator clip to lower the operation
frequency to 40 meters.
AHD ALEX (Alexandre Grimberg).