• Country
• United States of America (USA)

• Manufacturer / Brand
• Philco, Philadelphia Stg. Batt. Co.; USA

• Year
• 1936/1937

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 137758

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

• Number of Tubes
• 7

• Valves / Tubes
• 6K7G 6A8G 6K7G 6Q7G 6F6G 6F6G 5Y4G

• Main principle
• Superhet with RF-stage; ZF/IF 470 kHz

• Tuned circuits
• 7 AM circuit(s)

• Wave bands
• Broadcast plus 2 Short Wave bands.

• Power type and voltage
• Alternating Current supply (AC) / 115 Volt

• Loudspeaker
• Electro Magnetic Dynamic LS (moving-coil with field excitation coil)

• Power out
• 5 W (unknown quality)

• Material
• Wooden case

• from Radiomuseum.org
• Model: 37-640B - Philco, Philadelphia Stg. Batt

• Shape
• Tablemodel, Tombstone = decorative upright, not cathedral but can have rounded edges.

• Dimensions (WHD)
• 14 x 19 x 9.5 inch / 356 x 483 x 241 mm

• Notes

• The Philco model 37-640 series (1936-37) are 7-tube 3-band AC-powered receivers with shadow meter. The chassis is similar in design to its predecessors used in the model 640 series (1935) and 645 series (1936), but with newer octal tubes. Band coverage of 37-640 is 530-1720 kHz (BC), 2.3-7.4 MHz (SW1), and 7.35-22 MHz (SW2).
  
  There are three specific models in the series with different cabinet styles. Model 37-640B is a tombstone. Model 37-640X is a console with inclined sounding board, with a slightly trapezoidal overall profile. Model 37-640MX is a second console version with inclined sounding board, having a recessed control panel and four vertical slots for the speaker opening.

  Stein mentions this model as a two bands radio.

• Net weight (2.2 lb = 1 kg)
• 25 lb (25 lb 0 oz) / 11.350 kg

• Price in first year of sale
• 70.00 $

• Circuit diagram reference
• Rider's Perpetual, Volume 7 = 1936 and before

• Mentioned in
• Philco Radio 1928-1942

• Literature/Schematics (1)
• Philco Service Bulletin # 253

• Literature/Schematics (2)
• Machine Age to Jet Age II (page 221.)

• Literature/Schematics (3)
• Philco Folder No. PR-430 for 1937.

• Literature/Schematics (4)
• Cathedral & Tombstone Radios (page 196.)

• Author
• Model page created by Thomas Albrecht. See "Data change" for further contributors.

• Other Models

• Here you find 4016 models, 2211 with images and 3664 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Philco, Philadelphia Stg. Batt. Co.; USA