90 Baby Grand Early

• Paese
• USA (Stati Uniti d'America)

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

• Anno
• 1931

• Categoria
• Radio (o sintonizzatore del dopoguerra WW2)

• Radiomuseum.org ID
• 18815

• Immagini
• Schemi

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• Numero di tubi
• 9

• Valvole
• 24 24 27 24 24 27 45 45 80

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

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

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

• Tensioni di funzionamento
• Alimentazione a corrente alternata (CA) / 50 to 60 cycles, 115 Volt

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

• Materiali
• Mobile in legno

• Radiomuseum.org
• Modello: 90 Baby Grand [Early] - Philco, Philadelphia Stg. Batt

• Forma
• Soprammobile a cattedrale o cupola (upright, round top or pinted arch, not rounded edges only).

• Dimensioni (LxAxP)
• 0 x 18 x 0 inch / 0 x 457 x 0 mm

• Annotazioni

• Models 90 and 90A were available in a cathedral, a lowboy, and a highboy cabinet. The chassis was made in three versions - an early model 90 and 90A with two 45 output tubes in push-pull, a middle version with one 47 output tube, and a late version with two 47 output tubes. Model 90 is for 115 VAC 50-60 Hz; model 90A is for 115 VAC 25-60 Hz.

  The models 90 and 90A "early" and "middle" have a 4-gang tuning condenser plus 3 tuned IF circuit - both with IF 175 (Rider's change note 8-3). The version "middle", which are above serial number 237,001, of the model 90 and 90A has tubes: 24 RF, 27 osc, 24 1st det., 24 IF, 27 2nd det. rect., 27 det. amp., 27 1st AF amp, 47 output and 80 rectifier. The "late" model 90 and 90A again have push-pull output but with 2 x 47 tubes. See Rider's Philco 3-35 for IF 260 kHz. Applied on models serial B-32001 to B-35000 and above B-53100. They have a 3-gang tuning condenser and only 6 tuned circuits. The same differences can be found for all cabinets, both 90 and 90A: Baby Grand (Cathedral), Lowboy and Highboy (with a stretcher).

  The cathedral cabinet is the classic design by Edward L. Coombs, and is similar to the cathedral versions of model 21, 35, 46, and 70. [3331438-1133]

• Prezzo nel primo anno
• 69.00 $

• Fonte esterna dei dati
• E. Erb 3-907007-36-0

• Riferimenti schemi
• Die «Thali Schemasammlung» führt das Modell.

• Bibliografia
• Philco Radio 1928-1942

• Letteratura / Schemi (1)
• Rider's Perpetual, Volume 2 = 1932 and before (Philco 1928-36 Wiring Diagrams, Parts Lists, and Essential Service Data)

• Letteratura / Schemi (2)
• Machine Age to Jet Age II (page 213.)

• Letteratura / Schemi (3)
• Philco Folder 2674.

• Letteratura / Schemi (4)
• Cathedral & Tombstone Radios (page 193.)

• Altri modelli

• In questo link sono elencati 4068 modelli, di cui 2221 con immagini e 3717 con schemi.
  Elenco delle radio e altri apparecchi della Philco, Philadelphia Stg. Batt. Co.; USA