90 Baby Grand Early
Philco, Philadelphia Stg. Batt. Co.; USA
- Country
- United States of America (USA)
- Manufacturer / Brand
- Philco, Philadelphia Stg. Batt. Co.; USA
- Year
- 1931
- Category
- Broadcast Receiver - or past WW2 Tuner
- Radiomuseum.org ID
- 18815
By courtesy of William Kendrick, USA
Scanned from the Philco Folder 2674.
Scanned from the Philco Folder 2674.
From 1931 Philco sales flip book.
Click on the schematic thumbnail to request the schematic as a free document.
- Number of Tubes
- 9
- Main principle
- Superhet with RF-stage; ZF/IF 175 kHz
- Tuned circuits
- 7 AM circuit(s)
- Wave bands
- Broadcast only (MW).
- 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)
- Material
- Wooden case
- from Radiomuseum.org
- Model: 90 Baby Grand [Early] - Philco, Philadelphia Stg. Batt
- 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 (2)
- Machine Age to Jet Age II (page 213.)
- Literature/Schematics (3)
- Philco Folder 2674.
- Literature/Schematics (4)
- Cathedral & Tombstone Radios (page 193.)
- Other Models
-
Here you find 4068 models, 2221 with images and 3717 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
All listed radios etc. from Philco, Philadelphia Stg. Batt. Co.; USA
Collections
The model 90 is part of the collections of the following members.