David Clark C3019A Headset Adapter Overview:

The Model C3019A Utility Radio Adapter provides interface between any David Clark Series 3000 Noise Attenuating Headset and a mobile radio system. It’s compatible with most mobile radios requiring carbon
equivalent microphones. If the radio does not provide DC bias on the microphone audio line, switched battery voltage (13.8 V.D.C.) is required at radio options connector. The adaper is generally attached to the wearer’s belt but can be used in any convenient location. Select a location that allows freedom of movement while providing access to the PTT switch. Note: The C3019A is not interchangeable with existing C3019 installations as the connector and vehicle wiring requirements are different.

Features:

• Push-to-Talk Switch with optional off-hook revert function of the radio’s scan feature
• 7 Pin Screw-on MS Connector prevents accidental disconnect
• Rugged RFI Shielded Coil Cord - 15’ extended
• Listen Level Control, detented
• Sturdy Belt Clip

The C3019A requires a technician to wire a cable to the back of the radio at it’s accessories connector. The other end of the wire connects to a panel mount connector. Each individual radio has it’s own set up for the accessories connector and this information can be obtained from the radio’s service and/or operator manual(s). The C3019A then plugs into the panel mount connector.

Housing: All metal, affords RFI protection (3 1/4”L x 2 1/4”W x 1”D)
Adapter Coil Cord: Heavy-duty coil cord nominal 38” retracted, 15' extended, with rugged MS threaded connector. Headset Connector: 1/4" phone jack mates with 1/4" phone plug on 3000 Series Headset cord. PTT Switch: Single-step, momentary action, moistureproof and dust tight. Operating force 4 lbs max. with 100,000 cycle life.

The Model C3019A works with most Land Mobile Radios having a common GND (Ground) for both the mic line and the PTT line. It requires that 13.8 V.D.C. be provided from a switched, filtered voltage supply source. For normal operation, this supply source should be connected to pin G on the adapter MS connector. The internal 4PDT switch is factory- set to interface with radios that do not provide enough D.C. bias voltage to drive the microphone. However, this switch may be actuated to its other position to allow the adapter to interface with radios that do provide enough mic bias (8-16 V.D.C. through 470Ω to 560Ω resistor) voltage on the mic.