Special Features:

Ielectron tube 5, plug-in oscillator unit 3, oscillator stage unit 1, first mixer stage unit 1, second mixer stage unit 1, phase discriminator 1, third mixer-amplifier 1, crystal unit 1, crystal oven 1; joint electronics designation system no. Mx-3551/arc-34b; three no. 8 screws on 3.687 by 13.125 in. Mtg ctrs; differs from the mx-1489/arc-34 in that connectors are relocated voltages are brought in on different pins and parts with increased reliability are utilized

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.