The A120S Accessory in-Line Switch can be used to add an On/OFF, Push-To-Talk, Cough Button, or Transmitter-Relay Keying function to a microphone or other device rated at up to 3 amps ac (0.5 Adc) 125V, non-inductive load. The switch has gold-plated contacts for reliable performance even in low-current circuits. The switch is a double-pole doublethrow type for maximum versatility. Its push button combines with a rotary knob to provide either spring-return momentary or locking action.
The unit is supplied with a crimp-on strain relief tor 6.4mm (0.25-in.) diameter cable and with a flex relief for either large or small diameter cables. The permanently attached belt clip can be rotated on the case to any of four positions for the most convenience in use.
|Switch Function||Rotary Knob Position|
|On/Off (Button remains down until depressed a second time)||Locking|
|Push-To-Talk (Button remains down only while depressed)||Momentary|
The switch button can be locked down by following these steps:
The button will remain locked down until the knob is returned to locking and the button is depressed again.
For all other cables, loosely knot the cable above the flex relief to form a strain relief. Leave enough raw cable above the knot to permit soldering the individual conductors to the switch terminals.
When the switch is used to make connections in the middle of a cable run, it is very important to preserve continuity in the cable shield. If a splice is necessary for this, be sure it is insulated from other terminals, or you may employ an unused switch terminal to make the connection. Leaving the shield discontinuous may cause undesirable hum in a circuit.
If the cable is knotted to provide a strain relief, the center boss in the case may be inserted through the center of the knot with the cable lying to the side of the boss.