CRX-3 Covers the 108-136 mHz aviation band with 7 tubes. Front panel controls include illuminated slide rule dial with coarse and fine tuning, on-off volume and squelch controls and provision for two crystal-controlled frequencies. Rear chassis apron includes a slide switch and screw terminals for an external speaker. Cabinet 13½”w x 6″h x 8″d. Production Year 1962-63.
Hallicrafters CRX-101 Portamon, a compact hand-held solid state AM monitor receiver that covers the VHF aircraft band (108 to 135 MHz). 9 transistors. Power source is a 9 volt battery. These units were built from 1967 to 1969.
CRX-104 Solid state 11 transistor Aircraft Receiver, 108-138MHz. Production Year 1967-69.
Taken from https://www.qsl.net/la5ki/crx.htm