• Year
  • 1934
  • Category
  • Broadcast Receiver - or past WW2 Tuner
  • Radiomuseum.org ID
  • 232545
    • Brand: Musaphonic

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

 Technical Specifications

  • Number of Tubes
  • 5
  • Main principle
  • Superheterodyne (common); ZF/IF 460 kHz; 2 AF stage(s)
  • Tuned circuits
  • 6 AM circuit(s)
  • Wave bands
  • Broadcast and Short Wave (SW).
  • Power type and voltage
  • Alternating Current supply (AC) / Either transformer: 50-60Hz, 105-125V or 25-60Hz, 105-125V or 50-60Hz, 200-250 Volt
  • Loudspeaker
  • Electro Magnetic Dynamic LS (moving-coil with field excitation coil)
  • Power out
  • 1.75 W (3.5 W max.)
  • Material
  • Wooden case
  • from Radiomuseum.org
  • Model: M-51 - General Electric Co. GE;
  • Shape
  • Tablemodel, low profile (big size).
  • Dimensions (WHD)
  • 14.75 x 18.25 x 10 inch / 375 x 464 x 254 mm
  • Notes
  • The General Electric M-51 is an AC operated 5 tube BC and SW Band receiver.

    Band Frequency Ranges are as follows:
    BC Band.............540-1720kHz
    SW Band............5.40-18.00MHz

    Chassis and schematic used in this model also used in General Electric early production model M-56.

  • Price in first year of sale
  • 44.95 USD
  • Source of data
  • - - Manufacturers Literature
  • Literature/Schematics (2)
  • -- Original prospect or advert (Dayton Herald (newspaper), 14 Dec, 1934)
  • Author
  • Model page created by John Kusching. See "Data change" for further contributors.

 Collections | Museums | Literature

Collections

The model M-51 is part of the collections of the following members.

 Forum

Forum contributions about this model: General Electric Co.: M-51

Threads: 1 | Posts: 2

 

Hello Antique Radio Experts

 

I am working on bringing this 1934 GE M-51 Back to life.

I have at this point cleaned the chassis and replaced deteriorated cloth wiring.

All the paper and electrolytic capacitors have also been replaced. 

When I fired this old girl up she was completely soundless.  Power supplies looked good.

After a bit more investigation I found the audio output matching transformer has an open primary winding.   The speaker voice coil is good, along with the field coil.   If I could find an output transformer with 450 ohm primary and 4 ohm secondary I am sure I can bring this old girl back to life. 

Suggestion on where to find a transformer or other possible work around would be helpful.

 

 

Thanks for the Help

Bobstetz@msn.com

 

Bob

 

 

Robert Stetz, 17.Aug.20

Weitere Posts (2) zu diesem Thema.