• 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
• 51088

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 260 kHz

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

• Particolarità
• Giradischi (non cambiadischi)

• 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: 509X Radio-Phonograph - Philco, Philadelphia Stg. Batt

• Forma
• Console di qualsiasi tipo

• Annotazioni
• The Philco model 509X is a limited edition super deluxe high fidelity radio-phonograph using the same ten-tube two-band chassis as the 201X high fidelity radio. Only 500 units were built, and at a price of $600, were affordable only to the very rich.
  
  Like the model 201X, the 509X covers the BC and SW (4.2-12 MHz) bands and has variable IF bandwidth to trade off selectivity versus fidelity, controlled by a three-gang potentiometer to adjust the Q of two of the three IF transformers and the gain of both IF stages. Unlike most radios of its day, which were restricted to about 4 kHz of audio bandwidth, the 509X, like the 201X, 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. In addition to the fidelity-selectivity control, which functions somewhat like a treble control, there is a bass compensation switch. 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.
  
  

• Prezzo nel primo anno
• 600.00 $

• Fonte esterna dei dati
• Ernst Erb

• Fonte dei dati
• Philco Radio 1928-1942

• Riferimenti schemi
• Rider's Perpetual, Volume 6 = 1935 and before

• Bibliografia
• Philco Radio 1928-1942

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

• Altri modelli

• In questo link sono elencati 4041 modelli, di cui 2218 con immagini e 3690 con schemi.
  Elenco delle radio e altri apparecchi della Philco, Philadelphia Stg. Batt. Co.; USA