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640X Late

640X ; Philco, Philadelphia (ID = 534190) Radio
640X ; Philco, Philadelphia (ID = 534191) Radio
640X ; Philco, Philadelphia (ID = 534193) Radio
640X ; Philco, Philadelphia (ID = 534195) Radio
640X ; Philco, Philadelphia (ID = 1140916) Radio
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640X ; Philco, Philadelphia (ID = 1140916) Radio
Philco, Philadelphia: 640X [Radio] ID = 1140916 600x800
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For model 640X Late, Philco, Philadelphia Stg. Batt. Co.; USA
Country:  United States of America (USA)
Manufacturer / Brand:  Philco, Philadelphia Stg. Batt. Co.; USA
Year: 1935 Category: Broadcast Receiver - or past WW2 Tuner
Valves / Tubes 7: 78 6A7 78 85 42 42 80
Main principle Superhet with RF-stage; ZF/IF 460 kHz
Wave bands Broadcast, Long Wave and 2 x Short Wave.
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)
from Model: 640X [Late] - Philco, Philadelphia Stg. Batt
Material Wooden case
Shape Console with any shape - in general
Notes The Philco model 640 series uses a 7-tube 4-band chassis with shadow meter (tuning aid). The bands covered are 145-390 kHz, 540-1720 kHz, 2.2-2.6 MHz, and 5.8-18 MHz.

There are four individual models with different cabinet styles. Model 640B is a shouldered tombstone. The 640X floor-type console has two versions - an early version having a vase-shaped pattern in the lattice work over the speaker, and a late version having three vertical bars in front of the speaker. Model 640PF is a radio-phonograph console with the phonograph under the top cover.

The model 645 series (1936) is electrically very similar, as is the 37-640 series (1936-37), although the latter series has updated tubes and different band coverage.
Price in first year of sale 90.00 $
Source of data Philco Radio 1928-1942
Circuit diagram reference Rider's Perpetual, Volume 6 = 1935 and before
Literature/Schematics (1) Philco Service Bulletin # 221; Philco Wiring Diagrams, Parts Lists, and Essential Serv. Data 1928-36

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

All listed radios etc. from Philco, Philadelphia Stg. Batt. Co.; USA
Here you find 3741 models, 2122 with images and 3137 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.