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Remote controlled traveling loop

The remote controlled travelling loop was designed to be easy assembled, disassembled and carried to any place.

The antenna covers from 7 MHz to 29.6 MHz and incorporates a new concept to drive the variable capacitor at the same time that gives a frequency reference to an analog meter on the control box.

The secret is a small motor actuated volume control potentiometer normally find in audio home systems.

The potentiometer shaft turns simultaneously the variable capacitor and the potentiometer.

The potentiometer terminals are used in series with a 12VDC alkaline battery to supply the analog reference to the control box showing the resonance frequency on a sensitive meter modified scale.



Testing the system before mounting inside the tuning unit

Mounted turning and frequency analog reference unit



Remote control close view with the left small button for meter zeroing, right small button for speed motor turning control, big center button for the variable capacitor motor drive, and on off switch at the bottom right .


Control Box “American Airlines” soft carrying case



Control Box and tuning unit


PY1 AHD ALEX (Alexandre Grimberg).
e-mail: py1ahd@ig.com.br