• Paese
• USA (Stati Uniti d'America)

• Produttore / Marca
• MILITARY U.S. (different makers for same model)

• Anno
• 1936–1947 ?

• Categoria
• Ricevitore militare

• Radiomuseum.org ID
• 259937

Clicca sulla miniatura dello schema per richiederlo come documento gratuito.

• Numero di tubi
• 9

• Valvole
• 6B8 or VT-93 6C5 or VT-65 6F7 or VT-70 6J7 or VT-91 6K7 or VT-86 6K7 or VT-86 6K7 or VT-86 41 or VT-48 991

• Principio generale
• Supereterodina (in generale)

• Gamme d'onda
• Onde medie (OM) e più di 2 gamme di onde corte (> 2 x OC).

• Tensioni di funzionamento
• Batterie / presa di alimentazione supplementare / 14 Volt

• Altoparlante
• - Per cuffie o amplificatori esterni

• Materiali
• Mobile di metallo

• Radiomuseum.org
• Modello: Radio Receiver BC-224- - MILITARY U.S. different makers

• Forma
• Boatanchor (pesante apparecchio militare o commerciale, > 20 kg)

• Annotazioni

• Radio Receiver BC-224-(*) (Generic model - search also for model variants with different suffixes): Aircraft receiver covering medium - and shortwaves in six bands, modes AM (A3) and CW (A1, with BFO) powered by 14 V DC from aircraft on-board power system.

  The first BC-224-A receiver was constructed by RCA

  Based on U.S.Air Force receiver experience with this receiver, an improved model was produced with suffixes BC-224-B, BC-224-C, BC-224-D. RCA then started to produce a 28V DC version of this receiver which became the BC-348-B, the first receiver in the very successful series of BC-348 receivers.

  Then the U.S.Signal Corps had the demand to incorporate the 200 - 500 KHz longwave band (used in the U.S. for beacons, not for communications) in the receiver and to compress the 1,5 - 18 MHz tuning range in the remaining five bands,  this receiver became the BC-224-E, followed by receivers with higher suffix numbers. In those, frequency coverage was similar, in the BC-224-F (and -K), the output tube was changed to the 6K6. The 28V DC equivalent of the receivers covering the longwave / beacon band was the BC-348-E and higher suffix letters.

  The receivers saw use in bomber aircraft from World War II until Corean War, it is reported that one of these receiver was onboard the "Enola Gay" at it's 6. Aug. 1945 mission.

  Please do upload your model images to the best matching model variant page. - Bilder bitte auf die am besten passende Varianten - Modellseite laden.

  The uploaded schematic, from an article of the lamented I1BIN Umberto Bianchi on CQ Elettronica, Italian magazine, indicates power supply via Dynamotor, separated from the appliance and therefore for use in the absence of another power supply.

• Peso netto
• 40 lb (40 lb 0 oz) / 18.160 kg

• Bibliografia
• -- Schematic (From "CQ Elettronica", Italy, CD editor, number 12 December 1970)

• Autore
• Modello inviato da Michael Gnaedig-Fischer. Utilizzare "Proponi modifica" per inviare ulteriori dati.

• Altri modelli

• In questo link sono elencati 398 modelli, di cui 350 con immagini e 210 con schemi.
  Elenco delle radio e altri apparecchi della MILITARY U.S. (different makers for same model)