Special Features:

Major components: crystal unit, rectifying 1; mounting board 1; vacuum tube 1; usage design: oscillator subassembly for radar range calibrator; mounting method and configuration: plug-in unit held by two camloc fasteners on main chassis

Properties:

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