Radio Design Labs
Microphone Preamplifier-50 dB Gain
Loudness Equalizer-Use with VCA
Logic Controlled Relay-Dual Alternate Pulse
Logic Controlled Relay-Latching
High Power Logic Controlled Relay-8 A
Logic Controlled Relay-Momentary
Intercom Amplifier
300 Hz and 500 Hz High Pass Filter
Gated Speech Preamplifier-Mic to Line
Gated Line Amplifier-Noise Gate
Gain Control Amplifier-Line Level
Ferrite Suppressor/RF Filter