• 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
• 50532

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

• Number of Tubes
• 5

• Valves / Tubes
• 1D7G 1D5G 1H6G 1H4G 1E7G

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

• Wave bands
• Broadcast only (MW).

• Power type and voltage
• Storage and/or dry batteries / 135, 90, 2, -3, -9 Volt

• Loudspeaker
• Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) - elliptical

• Material
• Wooden case

• from Radiomuseum.org
• Model: 37-33B [Early] - Philco, Philadelphia Stg. Batt

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

• Notes

• The Philco model 37-33 series uses a 5-tube battery-powered single band chassis. For the filament supply, either a 2 volt storage battery can be used, or a dry battery (presumably 3 volt) with a ballast tube to reduce the voltage to 2 volts. According to the information in Rider, the ballast tube inserts into a socket on the dry A battery itself.
  
  There are multiple models in the series with different cabinet styles. Model 37-33B is a cathedral with an arch-shaped profile and four vertical bars through the speaker grill. There may also have been a late version with a scalloped speaker opening (documented in Ramirez 1993 edition, but not shown on Ramirez website in 2009).
  
  Model 37-33F is a floor-type console; the early version has a tulip pattern in the speaker opening, and the late version has a large rectangular speaker grill with three vertical bars.

• Price in first year of sale
• 40.00 $

• External source of data
• Ernst Erb

• Source of data
• Collector's Guide to Antique Radios 4. Edition

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

• Mentioned in
• The Radio Collector's Directory and Price Guide 1921 - 1965

• Literature/Schematics (1)
• Philco Radio 1928-1942

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

• 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