North Marco Bay QTH of K5MI
Pneumatic antenna mast extended to full height of 55 feet (ca 18 meters) with SteppIR yagi.
The antenna is made of fiber-glass elements with tuning copper strips inside, that driven with stepper motors mounted to the boom, adjust the strips automatically in length based on the frequency of the transceiver. Thus the antenna is always optimally tuned.
Click here for more info on SteppIR yagi.