Heathkit AC-1 Antenna Coupler

Will operate with any transmitter not exceeding 75 watts RF input power.

Shielded unit featuring a copper plated chassis and shield compartment.

Coaxial 52 ohm receptacle on the rear of the chassis connects to a three section Pi-type low pass filter
with a cutoff frequency of 36 Mc.

Tuning network consists of a variable capacitance and tapped inductance in an impedance matching unit.

Capacity coupled neon lamp serves as a tuning indicator and will also provide a rough indication of power output.