Special Features:

Fixed resistor 23, variable resistor 1, fixed capacitor 6, terminal board 1; four 1/8 in. Mtg screws on 2 x 3 in. Mtg ctrs; end item radio set type no. An/arn-21c for airborne navigation

Properties:

Two or more different types of items having a common mounting or mounted on each other which together form a portion of a selector control but which in itself is not a complete functioning item and cannot be assigned a more definite item name.