Audio PWB for Voice Transmission

Allows external voice modulation.

Plug in PCB enabling external voice modulation, featuring:

• automatic gain control (prevents over-modulation) capture, -30dBm to +5dBm
• automatic keyer tone modulation level reduction
• bandpass filtering, 300 - 3000 Hz
• nominal user input of -17dbm @ 600 ohms for 95% modulation