• Country
• United States of America (USA)

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

• Year
• 1934

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 50971

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

• Number of Tubes
• 8

• Valves / Tubes
• 78 6A7 78 75 42 42 42 80

• Main principle
• Superhet with RF-stage; ZF/IF 260 kHz

• Wave bands
• Broadcast (MW), Police, sometimes also early TV (75-200m).

• Details
• Record Player (not changer)

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

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

• Power out
• 10 W (unknown quality)

• Material
• Wooden case

• from Radiomuseum.org
• Model: 503L Radio-Phonograph [Early] - Philco, Philadelphia Stg. Batt

• Shape
• Console, Lowboy (legs < 50 %).

• Notes
• Model 503L is a lowboy radio-phonograph using the model 18 radio chassis. The early version of 503L used the early model 18 chassis with two bands, and the late version of 503L used the late single-band version of the model 18 radio chassis.

• External source of data
• Ernst Erb

• Source of data
• The Radio Collector's Directory and Price Guide 1921 - 1965

• Circuit diagram reference
• Rider's Perpetual, Volume 4 = ca. 1934 and before

• Mentioned in
• Philco Radio 1928-1942

• Literature/Schematics (1)
• Philco 1928-36 Wiring Diagrams, Parts Lists, and Essential Service Data

• Other Models

• Here you find 4086 models, 2222 with images and 3734 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Philco, Philadelphia Stg. Batt. Co.; USA