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90 Baby Grand Middle

90 Baby Grand; Philco, Philadelphia (ID = 22598) Radio
 
90 Baby Grand; Philco, Philadelphia (ID = 22600) Radio
 
90 Baby Grand; Philco, Philadelphia (ID = 509088) Radio
 
90 Baby Grand; Philco, Philadelphia (ID = 509089) Radio
90 Baby Grand; Philco, Philadelphia (ID = 502567) Radio 90 Baby Grand; Philco, Philadelphia (ID = 502568) Radio
90 Baby Grand; Philco, Philadelphia (ID = 1330245) Radio 90 Baby Grand; Philco, Philadelphia (ID = 1484444) Radio
90 Baby Grand; Philco, Philadelphia (ID = 1484445) Radio
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90 Baby Grand; Philco, Philadelphia (ID = 502567) Radio
Philco, Philadelphia: 90 Baby Grand [Radio] ID = 502567 525x700
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For model 90 Baby Grand Middle, Philco, Philadelphia Stg. Batt. Co.; USA
 
Country:  United States of America (USA)
Manufacturer / Brand:  Philco, Philadelphia Stg. Batt. Co.; USA
Year: 1931 perfect model Category: Broadcast Receiver - or past WW2 Tuner
Valves / Tubes 9: 24 27 24 24 27 27 27 47 80
Main principle Superhet with RF-stage; ZF/IF 175 kHz
Tuned circuits 7 AM circuit(s)
Wave bands Broadcast only (MW).
Details
Power type and voltage Alternating Current supply (AC) / 50 to 60 cycles, 115 Volt
Loudspeaker Electro Magnetic Dynamic LS (moving-coil with field excitation coil)
Power out
from Radiomuseum.org Model: 90 Baby Grand [Middle] - Philco, Philadelphia Stg. Batt
Material Wooden case
Shape Table-Cathedral-Type (upright, round top or gothic arch, not rounded edges only).
Dimensions (WHD) 0 x 18 x 0 inch / 0 x 457 x 0 mm
Notes

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]

Price in first year of sale 69.00 $
External source of data E. Erb 3-907007-36-0
Circuit diagram reference Die «Thali Schemasammlung» führt das Modell.
Mentioned in Philco Radio 1928-1942
Literature/Schematics (1) Rider's Perpetual, Volume 2 = 1932 and before (Philco 1928-36 Wiring Diagrams, Parts Lists, and Essential Service Data)
Literature/Schematics (3) Philco Folder 2674.


All listed radios etc. from Philco, Philadelphia Stg. Batt. Co.; USA
Here you find 3737 models, 2110 with images and 3134 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.




  
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