• 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
• 331865

Click on the schematic thumbnail to request the schematic as a free document.

• Number of Tubes
• 7

• Valves / Tubes
• 27 24 24 24 45 45 80

• Main principle
• TRF without regeneration; 2 AF stage(s); Export model

• Tuned circuits
• 3 AM circuit(s)

• Wave bands
• Broadcast (MW) and Long Wave.

• Power type and voltage
• Alternating Current supply (AC) / 230 Volt

• Loudspeaker
• Electro Magnetic Dynamic LS (moving-coil with field excitation coil) / Ø 8 inch = 20.3 cm

• Power out
• 4 W (8 W max.)

• Material
• Wooden case

• from Radiomuseum.org
• Model: 21-E - Philco, Philadelphia Stg. Batt

• Shape
• Table-Cathedral-Type (upright, round top or gothic arch, not rounded edges only).

• Dimensions (WHD)
• 16.5 x 18 x 10 inch / 419 x 457 x 254 mm

• Notes

• This appears to be the export model (-E suffix) of the 21 Baby Grand, and has a band change switch above the 3 coils. The switch is located on the front panel in a rather odd place.

• Net weight (2.2 lb = 1 kg)
• 27 lb (27 lb 0 oz) / 12.258 kg

• Author
• Model page created by Graham Moore. See "Data change" for further contributors.

• Other Models

• Here you find 4007 models, 2207 with images and 3656 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Philco, Philadelphia Stg. Batt. Co.; USA