EH-150

Gibson Manufacturing Co., Kalamazoo (MI)

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  • Year
  • 1937 ?
  • Category
  • Audio Amplifier or -mixer
  • Radiomuseum.org ID
  • 320801

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

 Technical Specifications

  • Number of Tubes
  • 7
  • Main principle
  • Audio-Amplification
  • Wave bands
  • - without
  • Power type and voltage
  • Alternating Current supply (AC) / 110 -125 Volt
  • Loudspeaker
  • Electro Magnetic Dynamic LS (moving-coil with field excitation coil) / Ø 12 inch = 30.5 cm
  • Material
  • Leather / canvas / plastic - over other material
  • from Radiomuseum.org
  • Model: EH-150 - Gibson Manufacturing Co.,
  • Shape
  • Tablemodel, high profile (upright - NOT Cathedral nor decorative).
  • Notes

  • There were at least four versions of this amplifier as follows:

    Style 1:  1935 - 1936 with four tubes (6A6 6F6 6F6 5Z4 or 80) and 10 inch speaker

    Style 2:  1936 - 1937 with six tubes (6F5 6N7 6C5 6N6 6N6 5Z3) and 10 inch speaker

    Style 3:  1937 - 1941 with seven tubes and 12 inch speaker.  There was an early "transition" version from Style 2 that most likely was only made in 1937.  This is the model depicted on this model page.  It had the same schematic as Style 2 except that the 6N7 was replaced with two 6C5's.  The schematic on this model page is for Style 2 with revisions showing the two 6C5's.  The Style 3 "late" version substituted two 6L6's for the 6N6's.  The Style 3 late version also eliminated the protective leather corners at the top of the front face, and instead, had rounded corners.

    Style 4: 1941 - 1942 that used  a tube phase inverter with a 6N7 replacing the transformer.  The rectifier was changed to a 5U4 and the three 6C5's were replaced with 6SQ7's.

  • Author
  • Model page created by David Erali. See "Data change" for further contributors.

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The model EH-150 is part of the collections of the following members.

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