• Country
• United States of America (USA)

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

• Year
• 1937

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 140828

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

• Number of Tubes
• 5

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

• Main principle
• Superheterodyne (common); ZF/IF 470 kHz

• 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
• 3 W (unknown quality)

• Material
• Wooden case

• from Radiomuseum.org
• Model: 37-610T Big Bullet [Late ] - Philco, Philadelphia Stg. Batt

• Shape
• Tablemodel, low profile (big size).

• Notes

• The Philco model 37-610 series (1936-37) is the follow-on of the model 610 series (1936), and uses a similar 5-tube 3-band chassis, but with updated octal tubes and different band coverage (BC, 2.3-7.4 MHz, and 7.35-22 MHz). There are five specific models in the series with different cabinet styles.
  
  The early version (1936) of the table model 37-610T has a cabinet with a round left side, and a speaker opening with a circular lower part and horizontal bars in the upper part. This cabinet was available in both walnut and maple versions. The early version uses a code 122 chassis.
  
  The late version (1937) of 37-610T has a cabinet similar to the early version, except that two of the horizontal bars in the speaker opening are "S" shaped and descend lower into circular part of the opening. The late model uses a code 126 chassis.
  
  The early version of the tombstone model 37-610B (1936) has a shouldered profile and uses a code 121 chassis. The late version (1937) has a retangular profile and a code 125 chassis.
  
  Model 37-610J (1936-37) is a floor-type console with a slightly trapezoidal profile and three bars in front of the speaker. It uses either a code 121 or 125 chassis.
  
  The differences between the various chassis codes are as follows: Codes 122 and 126 are low profile chassis to fit into the shorter -T cabinets. The height of these versions is reduced by locating the 5Y4G rectifier tube next to the transformer instead of on top of it, as in the taller code 121 and 125 chassis. Codes 121 and 122 were used in 1936; codes 125 and 126 were used in 1937 and have slight circuit changes in the RF section.
  
  The model 38-610 series (1937-38) is a continuation of the 37-610 series, with chassis and some of the cabinets having very similar design.

• Price in first year of sale
• 48.00 $

• Source of data
• Philco Radio 1928-1942

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

• Mentioned in
• Machine Age to Jet Age II (page 220.)

• Literature/Schematics (1)
• Philco Service Bulletin #249B

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

• Other Models

• Here you find 4041 models, 2217 with images and 3690 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Philco, Philadelphia Stg. Batt. Co.; USA