Set pushbutton switch S3 to the IN position to select SPEAKER level input.
Install the jumper block between the pins on J4 labeled “SPEAKER” to select speaker level output.
Connect the scanner’s audio output to J7, RX IN and connect your speaker to J6 RX OUT.
TX OUT TX IN RX OUT RX IN POWER
External Speaker
Scanner or
Receiver
External Speaker or Earphone
TAPE RECORDER CONNECTION
In hooking up a tape recorder, we’ll make use of the SS70A’s TX and RX paths. We’ll scramble the audio through the TX path and send it on to the recorder’s input to be recorded. We’ll use the SS70A’s RX path to take the recorder’s playback audio and unscramble.
Microphone
SS - 70A
TX OUT TX IN RX OUT RX IN POWER
External Speaker
Microphone
Input
External Speaker or Earphone
O
Once the wires are “hooked up”, energize the circuit and try taping a scrambled message.Then try to playback and descramble it! While playing