• Country
• United States of America (USA)

• Manufacturer / Brand
• Lear Inc.; Grand Rapids and Los Angeles

• Year
• 1947

• Category
• Commercial Receiver (may include amateur bands)

• Radiomuseum.org ID
• 46143

Click on the schematic thumbnail to request the schematic as a free document.

• Number of Tubes
• 7

• Valves / Tubes
• 1N5GT 1A7GT 1N5GT 1H5GT 1A5GT 50B5 35W4

• Main principle
• Superhet with RF-stage; ZF/IF 455 kHz; 2 AF stage(s)

• Tuned circuits
• 7 AM circuit(s)

• Wave bands
• Broadcast, Long Wave and Short Wave.

• Power type and voltage
• Line / Batteries (any type) / AC/DC 105-125 / 7.5 & 90 Volt

• Loudspeaker
• Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil)

• Material
• Leather / canvas / plastic - over other material

• from Radiomuseum.org
• Model: Learavian - Beacon, Broadcast and Airline Receiver RM-402C - Lear Inc.; Grand Rapids and

• Shape
• Portable set > 8 inch (also usable without mains)

• Notes

• Advertised as "The Pilot's Preference", the Learavian RM-402C receiver had both a general coverage long wave band from 195 to 410 kHz for Airways aural navigation ranges and beacons and a shortwave band from 2.2 to 6.2 MHz for monitoring pilot - tower communications.  The receiver also covered the broadcast band from 540 to 1500 kHz.  The self-contained radio was primarily designed for the private pilot who may have been flying an airplane with no or minimal electrical systems. It included a microphone input allowing for intercom use in the cockpit. The loop antenna was self-contained. A coaxial RCA phono-type jack was included for use with an external antenna.  The weight with batteries was advertised as "14 pounds three ounces". The outer covering of the wood box was luggage canvas advertised as available in either beige tweed or wine color. The power cord contains a third resistance wire of 200 ohms for dropping the filament voltage to 85 for the 35W4 and 50B5 tubes when operating from 115 volts AC-DC.

• Net weight (2.2 lb = 1 kg)
• 14 lb 3 oz (14.188 lb) / 6.441 kg

• Price in first year of sale
• 75.00 USD

• External source of data
• Ernst Erb

• Source of data
• The Radio Collector's Directory and Price Guide 1921 - 1965

• Circuit diagram reference
• Rider's Perpetual, Volume 22, covering 1951

• Mentioned in
• -- Original prospect or advert (Aviation Week ad p.22 April 1947)

• Literature/Schematics (1)
• -- Original-techn. papers. ("‘The Pilot’s Preference’ Learavian RM-402C Receiver", The Spectrum Monitor - R Post, 2-2024)

• Literature/Schematics (4)
• Photofact Folder, Howard W. SAMS (Set 42, Date 7/48, Folder 4812-15)

• Other Models

• Here you find 46 models, 27 with images and 40 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Lear Inc.; Grand Rapids and Los Angeles