4445A Model 9A variometer tuned

Atwater Kent Mfg. Co.; Philadelphia, USA

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  • Year
  • 1923
  • Category
  • Broadcast Receiver - or past WW2 Tuner
  • Radiomuseum.org ID
  • 183108

 Technical Specifications

  • Number of Tubes
  • 4
  • Main principle
  • TRF without regeneration
  • Tuned circuits
  • 2 AM circuit(s)
  • Wave bands
  • Broadcast only (MW).
  • 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: 4445A Model 9A [variometer tuned] - Atwater Kent Mfg. Co.;
  • Shape
  • Miscellaneous shapes - described under notes.
  • Dimensions (WHD)
  • 620 x 220 x 220 mm / 24.4 x 8.7 x 8.7 inch
  • Notes

  • Breadboard. Two dials (primary tuning control knobs).
    This was the last version of the variometer tuned Model 9. Battery binding posts were removed and power was carried to the receiver through a cable. The early version 9 used a green T/A unit and battery binding post connections while the later version used the cable and a brown wrinkle paint finish T/A can.
    Breadboard consisting of two type 11 tuners, RF-amp, TA 3812 Det./Amp; even regeneration was possible (though not designed for) through plate coupling (with a very good front tube);

    Antenna connections for long and short antenna on top of the board. Ground connection on the first variometer.

  • Net weight (2.2 lb = 1 kg)
  • 5 kg / 11 lb 0.2 oz (11.013 lb)
  • Literature/Schematics (2)
  • The Atwater Kent Radios, The AWA Review, 1999 Vol. 12, by Ralph O. Williams, pages 53-57

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The model 4445A is part of the collections of the following members.

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