• Country
• United States of America (USA)

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

• Year
• 1936

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 51117

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

• Number of Tubes
• 7

• Valves / Tubes
• 78 6A7 78 85 42 42 80

• Main principle
• Superhet with RF-stage; ZF/IF 460 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
• 7 W (unknown quality)

• Material
• Wooden case

• from Radiomuseum.org
• Model: 645B - Philco, Philadelphia Stg. Batt

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

• Notes

• The Philco model 645 series (1936) is a follow-on to the 640 series (1935) and uses a 7-tube 3-band chassis with shadow meter (tuning aid). The bands covered are BC, 1.75-5.8 MHz, and 5.75-18 MHz.
  
  There are two individual models with different cabinet styles. Model 645B is a simple rectangular tombstone with rounded upper corners. Model 645K is a floor-type console with a slightly tapered (trapezoidal) profile.
  
  The model 37-640 series (1936-37) is electrically very similar, although the latter series has updated tubes and different band coverage.

  Stein mentions this model as a  two bands radio.

• Price in first year of sale
• 70.00 $

• External source of data
• Ernst Erb

• Source of data
• Philco Radio 1928-1942

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

• Mentioned in
• Cathedral & Tombstone Radios (page 196.)

• 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