SK-201 Soft-Key Keying Interface
The SK-201 safely acts as an amplifier interface to your modern transceiver to the Heathkit SB-200 or SB-201. This unit is mounted inside the amplifier and transforms the negative 120VDC key closure to approximately 1.7VDC at 1.5mA. Without it you run the risk of severely damaging the keying circuit in your transceiver.
|5.5 × 3.5 × 0.5 in