Astatic AST878DM

The Astatic AST878DM is an amplified omnidirectional ceramic desk microphone designed for CB, amateur (ham), and 10-meter radios. It is known for providing loud, clear audio, though some users note a “tinny” sound on single sideband (SSB) transmissions.
Key Features and Specifications
Type: Amplified omnidirectional ceramic desk microphone.
Housing: Rugged cycolac resin for industrial and commercial applications.
Buttons: Features standard Push-to-Talk (PTT) and Lock-to-Talk buttons.
Connectivity: Wired with a 4-pin connector, compatible with standard Cobra/Galaxy/Uniden wiring. Other configurations (e.g., 6-pin President/Ranger) are available or can be wired.
Power: Requires a standard 9-volt battery (not included) for the amplifier.
Cable: 5-conductor shielded cable.
Volume: Adjustable gain/volume with a potentiometer located under the base.
Impedance: 5000 Ohms max.
Sensitivity: -44dB at 1 kHz.