650MX (650, 650A)

Philco, Philadelphia Stg. Batt. Co.; USA

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  • Year
  • 1935
  • Category
  • Broadcast Receiver - or past WW2 Tuner
  • Radiomuseum.org ID
  • 141793

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

 Technical Specifications

  • Number of Tubes
  • 8
  • 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
  • 10 W (unknown quality)
  • Material
  • Wooden case
  • from Radiomuseum.org
  • Model: 650MX - Philco, Philadelphia Stg. Batt
  • Shape
  • Console with any shape - in general
  • Notes
  • The Philco 650 series (1935) is based on an 8-tube 4-band chassis with shadow meter (tuning aid). The band covereage is 145-390 kHz, BC, 2.2-2.6 MHz, and 5.8-18 MHz. The standard 650 chassis uses 115 VAC 50-60 Hz power, and the 650A chassis is for 115 VAC 25-40 Hz.

    There are six individual models in the series with different cabinet styles. Model 650B is a shouldered tombstone.

    Model 650H is a short-legged console (not really a highboy, even though Philco uses the -H suffix to designate a highboy) with controls under a small lid on the top of the cabinet. Model 650X is a floor-type console with inclined sounding board and controls on the front of the cabinet. Model 650MX is another floor-type console with controls under a lid on the top of the cabinet.

    Model 650RX is two part radio with a chairside control unit and a large separate speaker cabinet (the speaker cabinet itself being as large as a console radio).

    Model 650PX is a console radio-phonograph with a 78 RPM single-play phonograph under the top cover.

    The tombstone 650B, with its smaller cabinet, uses a smaller speaker and a code 121 chassis. The other models use a larger speaker and a code 122 chassis.

    The model 650 series was superceded in 1936 by the 655 series, which is electrically similar, but without the long wave band, and has updated cabinet styles.
  • Price in first year of sale
  • 125.00 $
  • Circuit diagram reference
  • Rider's Perpetual, Volume 6 = 1935 and before
  • Literature/Schematics (1)
  • Philco Service Bulletin # 220; Philco Wiring Diagrams, Parts Lists, and Essential Serv. Data 1928-36
  • Author
  • Model page created by Thomas Albrecht. See "Data change" for further contributors.

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