• Year
  • 1922/1923
perfect model
  • Category
  • Audio Amplifier or -mixer
  • Radiomuseum.org ID
  • 106433

 Technical Specifications

  • Number of Tubes
  • 2
  • Main principle
  • Audio-Amplification
  • Wave bands
  • - without
  • Power type and voltage
  • Storage and/or dry batteries
  • Loudspeaker
  • - This model requires external speaker(s).
  • Material
  • Wooden case, TUBES VISIBLE.
  • from Radiomuseum.org
  • Model: AC-2-C amplifier - Magnavox Co., Commercial
  • Shape
  • Tablemodel, Box - most often with Lid (NOT slant panel).
  • Dimensions (WHD)
  • 330 x 160 x 210 mm / 13 x 6.3 x 8.3 inch
  • Notes
  • Wooden case with bakelite panel. Price in 1922 was 80 us$, in 1923: 55 US$. Metal tube socket skirts are double-slotted to accommodate 45 degree offset tubes like VT-2, WE 205, etc. as well as standard UV / UX based tubes.

    An owner ("firebottles") wrote: "The amp was both sold and leased by Magnavox, and it was designed to be used in different applications, including public address systems, where -- when paired with an appropriate input device, such as a hand transmitter, a phonograph reproducer or an early regenerative radio -- it could power a two-coil Magnavox Telemegaphone horn loudspeaker to deafening volumes. The amp's unique tube sockets have dual guide pins and can accomodate either conventional 01A triodes or Western Electric 205-D tubes. This is an early DC-powered amplifier.  
    If you want to power it up, you'll need an appropriate power supply (such as an ARBE III), an appropriate input device (such as an early battery radio), and an appropriate output device (such as a 1920's horn speaker).  The amp was not designed to work with modern, low-impedance high fidelty equipment, and I would not recommend that anyone attempt to adapt it to that purpose.  Even when used with 205-D tubes and an impedance matching transformer, it is not capable of matching the fidelity of contemporary amplifiers"
    .
    We like to add that the 205D is all right, but was on the market only since 1924. The UX201A was on the market since 1925 and the dome shaped 01A is only existing since 1932! Really correct would be the General Electric UV201A or the Western Electric 216A, both from 1922.

  • Net weight (2.2 lb = 1 kg)
  • 4.1 kg / 9 lb 0.5 oz (9.031 lb)
  • Price in first year of sale
  • 80.00 $
  • Source of data
  • -- Collector info (Sammler)
  • Mentioned in
  • -- Original prospect or advert (Robertson-Cataract Catalog No.22)
  • Literature/Schematics (2)
  • Radio Broadcast, Sep. 1923
  • Literature/Schematics (3)
  • Radio Digest Illustrated, 1922 Nov. 25, p. 15
  • Author
  • Model page created by John Koster. See "Data change" for further contributors.

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