• Paese
• USA (Stati Uniti d'America)

• Produttore / Marca
• Lear Inc.; Grand Rapids and Los Angeles

• Anno
• 1947

• Categoria
• Ricevitore professionale (può includere bande amatoriali)

• Radiomuseum.org ID
• 46143

Clicca sulla miniatura dello schema per richiederlo come documento gratuito.

• Numero di tubi
• 7

• Valvole
• 1N5GT 1A7GT 1N5GT 1H5GT 1A5GT 50B5 35W4

• Principio generale
• Supereterodina con stadio RF; ZF/IF 455 kHz; 2 Stadi BF

• N. di circuiti accordati
• 7 Circuiti Mod. Amp. (AM)

• Gamme d'onda
• Onde medie (OM), lunghe (OL) e corte (OC).

• Tensioni di funzionamento
• Rete / Batterie (ogni tipo) / AC/DC 105-125 / 7.5 & 90 Volt

• Altoparlante
• AP magnetodinamico (magnete permanente e bobina mobile)

• Materiali
• Pelle / stoffa / plastica ma con altro materiale sottostante

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

• Forma
• Apparecchio portatile > 20 cm (senza la necessità di una rete)

• Annotazioni

• 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.

• Peso netto
• 14 lb 3 oz (14.188 lb) / 6.441 kg

• Prezzo nel primo anno
• 75.00 USD

• Fonte esterna dei dati
• Ernst Erb

• Fonte dei dati
• The Radio Collector's Directory and Price Guide 1921 - 1965

• Riferimenti schemi
• Rider's Perpetual, Volume 22, covering 1951

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

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

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

• Altri modelli

• In questo link sono elencati 46 modelli, di cui 27 con immagini e 40 con schemi.
  Elenco delle radio e altri apparecchi della Lear Inc.; Grand Rapids and Los Angeles