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90A Baby Grand Middle

90A Baby Grand; Philco, Philadelphia (ID = 245896) Radio
 
90A Baby Grand; Philco, Philadelphia (ID = 509084) Radio
 
90A Baby Grand; Philco, Philadelphia (ID = 509085) Radio
90A Baby Grand; Philco, Philadelphia (ID = 377758) Radio 90A Baby Grand; Philco, Philadelphia (ID = 377759) Radio
90A Baby Grand; Philco, Philadelphia (ID = 377756) Radio 90A Baby Grand; Philco, Philadelphia (ID = 377757) Radio
90A Baby Grand; Philco, Philadelphia (ID = 1263053) Radio 90A Baby Grand; Philco, Philadelphia (ID = 1330242) Radio
90A Baby Grand; Philco, Philadelphia (ID = 1484440) Radio 90A Baby Grand; Philco, Philadelphia (ID = 1484441) Radio
90A Baby Grand; Philco, Philadelphia (ID = 1494027) Radio
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90A Baby Grand; Philco, Philadelphia (ID = 377758) Radio
Philco, Philadelphia: 90A Baby Grand [Radio] ID = 377758 372x428
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For model 90A Baby Grand Middle, Philco, Philadelphia Stg. Batt. Co.; USA
 
Paese:  USA (Stati Uniti d'America)
Produttore / Marca:  Philco, Philadelphia Stg. Batt. Co.; USA
Anno: 1931 perfect model Categoria: Radio (o sintonizzatore del dopoguerra WW2)
Valvole 9: 24 24 27 24 27 27 27 47 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).
Particolarità
Tensioni di funzionamento Alimentazione a corrente alternata (CA) / 25 to 60 cycles, 115 Volt
Altoparlante AP elettrodinamico (bobina mobile e bobina di eccitazione/di campo)
Potenza d'uscita
Radiomuseum.org Modello: 90A Baby Grand [Middle] - Philco, Philadelphia Stg. Batt
Materiali Mobile in legno
Forma Soprammobile a cattedrale o cupola (upright, round top or pinted arch, not rounded edges only).
Dimensioni (LxAxP) 18 x 19 x 12 inch / 457 x 483 x 305 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.
 

Prezzo nel primo anno 69.00 $
Fonte esterna dei dati Ernst Erb
Fonte dei dati Radio Collector`s Guide 1921-1932
Riferimenti schemi Rider's Perpetual, Volume 2 = 1932 (Models 1931/1932)
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 (3) Philco Folder 2674.


Elenco delle radio e altri apparecchi della Philco, Philadelphia Stg. Batt. Co.; USA
In questo link sono elencati 3737 modelli, di cui 2110 con immagini e 3134 con schemi.




  
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