• Paese
• USA (Stati Uniti d'America)

• Produttore / Marca
• Philco, Philadelphia Stg. Batt. Co.; USA

• Anno
• 1934/1935

• Categoria
• Radio (o sintonizzatore del dopoguerra WW2)

• Radiomuseum.org ID
• 50478

Clicca sulla miniatura dello schema per richiederlo come documento gratuito.

• Numero di tubi
• 10

• Valvole
• 78 6A7 78 78 37 75 42 42 42 5Z3

• Principio generale
• Supereterodina con stadio RF; ZF/IF 175 kHz

• Gamme d'onda
• Solo onde medie (OM).

• Tensioni di funzionamento
• Alimentazione a corrente alternata (CA) / 115 Volt

• Altoparlante
• AP elettrodinamico (bobina mobile e bobina di eccitazione/di campo)

• Potenza d'uscita
• 15 W (qualità ignota)

• Materiali
• Mobile in legno

• Radiomuseum.org
• Modello: 200X Gothic - Philco, Philadelphia Stg. Batt

• Forma
• Console di qualsiasi tipo

• Annotazioni
• The Philco model 200X (1934-35) was one of the industry's first high fidelity radios. The ten-tube single band chassis has variable IF bandwidth to trade off selectivity versus fidelity, controlled by a three-gang potentiometer to adjust the Q of the two of the IF transformers and the gain of the mixer stage. Unlike most radios of its day, which were restricted to about 4 kHz of audio bandwidth, the 200X has 7.5 kHz of bandwidth at its maximum fidelity setting. The circuit includes a 10 kHz audio filter to remove the high pitched heterodyne that could be caused by the carrier of an adjacent channel. The chassis has a shadow meter (tuning aid) with its own dedicated control tube (unlike other Philco designs where the shadow meter simply indicates B+ current to the RF and/or IF stages). The push-pull output stage, with one 42 driver tube and two 42 output tubes, delivers 15 watts of undistorted output.
  
  The cabinet is a floor-type console with inclined sounding board.
  
  Philco also introduced another high fidelity model in 1934 - the 201X. It was similar to model 200X but had two bands (BC + SW).

• Prezzo nel primo anno
• 200.00 $

• Fonte esterna dei dati
• Ernst Erb

• Fonte dei dati
• Collector's Guide to Antique Radios 4. Edition

• Riferimenti schemi
• Rider's Perpetual, Volume 5 = ca. 1934 and before

• Bibliografia
• The Radio Collector's Directory and Price Guide 1921 - 1965

• Letteratura / Schemi (1)
• Philco Radio 1928-1942 (Philco 1928-36 Wiring Diagrams, Parts Lists, and Essential Service Data)

• Letteratura / Schemi (2)
• Pre-War Consoles

• Altri modelli

• In questo link sono elencati 4016 modelli, di cui 2211 con immagini e 3664 con schemi.
  Elenco delle radio e altri apparecchi della Philco, Philadelphia Stg. Batt. Co.; USA