• Country
• United States of America (USA)

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

• Year
• 1934/1935

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 50478

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

• Number of Tubes
• 10

• Valves / Tubes
• 78 6A7 78 78 37 75 42 42 42 5Z3

• Main principle
• Superhet with RF-stage; ZF/IF 175 kHz

• Wave bands
• Broadcast only (MW).

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

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

• Power out
• 15 W (unknown quality)

• Material
• Wooden case

• from Radiomuseum.org
• Model: 200X Gothic - Philco, Philadelphia Stg. Batt

• Shape
• Console with any shape - in general

• Notes
• The Philco model 200X (1934-35) was one of the industry's first high fidelity radios. The ten-tube single band chassis has variable IF bandwidth to trade off selectivity versus fidelity, controlled by a three-gang potentiometer to adjust the Q of the two of the IF transformers and the gain of the mixer stage. Unlike most radios of its day, which were restricted to about 4 kHz of audio bandwidth, the 200X has 7.5 kHz of bandwidth at its maximum fidelity setting. The circuit includes a 10 kHz audio filter to remove the high pitched heterodyne that could be caused by the carrier of an adjacent channel. The chassis has a shadow meter (tuning aid) with its own dedicated control tube (unlike other Philco designs where the shadow meter simply indicates B+ current to the RF and/or IF stages). The push-pull output stage, with one 42 driver tube and two 42 output tubes, delivers 15 watts of undistorted output.
  
  The cabinet is a floor-type console with inclined sounding board.
  
  Philco also introduced another high fidelity model in 1934 - the 201X. It was similar to model 200X but had two bands (BC + SW).

• Price in first year of sale
• 200.00 $

• External source of data
• Ernst Erb

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

• Circuit diagram reference
• Rider's Perpetual, Volume 5 = ca. 1934 and before

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

• Literature/Schematics (1)
• Philco Radio 1928-1942 (Philco 1928-36 Wiring Diagrams, Parts Lists, and Essential Service Data)

• Literature/Schematics (2)
• Pre-War Consoles

• Other Models

• Here you find 4019 models, 2215 with images and 3667 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Philco, Philadelphia Stg. Batt. Co.; USA