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.