AM Tuner AJ-20

Heathkit (Brand), Heath Co.; Benton Harbor (MI)

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  • Year
  • 1961
  • Category
  • Kit (Parts plus instruction) or building instructions only
  • Radiomuseum.org ID
  • 367641
    • alternative name: Heath Company

 Technical Specifications

  • Number of Tubes
  • 4
  • Main principle
  • Superheterodyne (common)
  • Wave bands
  • Broadcast only (MW).
  • Details
  • Hi-Fi equipment
  • Power type and voltage
  • Alternating Current supply (AC) / 117 Volt
  • Loudspeaker
  • - For headphones or amp.
  • Material
  • Metal case
  • from Radiomuseum.org
  • Model: AM Tuner AJ-20 - Heathkit Brand, Heath Co.;
  • Shape
  • Book-shelf unit.
  • Dimensions (WHD)
  • 13.25 x 4.26 x 5.5 inch / 337 x 108 x 140 mm
  • Notes

  • Heathkit AJ-20. For high-fidelity AM reception at a budget price, you can't beat the Heathkit AJ-20. Self powered, this little giant packs three tuned stages for best sensitivity and a full wave voltage doubler detector for lowest distortion. The "fidelity" selector switch gives you a choice of maximum selectivity or maximum fidelity. One of the two outputs is variable level cathode follower type for direct driving of power amplifiers, regardless of cable length; the other output is "fixed" for use with preamplifiers. A built-in rod antenna and terminals for an external
    antenna are included. Flywheel tuning makes station selection quick and the edge-lighted slide-rule dial is easy to read. 

    SPECIFICATIONS-
    Tuning range: 550 kc to 1600 kc.
    Intermediate Frequency; 455 kc.
    Sensitivity (for 20 db quieting IHFM standards): 1000kc-8 uv. IF bandwidth (6 db down): NORMAL-7 kc.; MAXIMUM-18 kc.
    Output impedance (cathode follower): 5000 ohms Input signal for 1 volt output: 2.5 uv-30% mod. 1000 kc.
    Image ratio: 1000 kc-50 db.
    Harmonic distortion (750 uv 95% mod.): less than 1%. Hum and noise (5000uv-30% mod.): 40 db.
    IF reiection: 1000kc-35 db.
    Tube complement: 2-6BA6, RFamplifier-IF amplifier, 1-6BE6, Oscillator/Mixer. 1-12AU7, AF Amplifier-Cathode follower. 2-Crystal Diodes, Audio Detector, 1-Silicon Diode, Rectifier (Power Supply). 1-No. 47 Pilot Lamp (Dial Illumination).
    Power supply: Transformer operated (fused).
    Power requirements: 117V AC, 50/60 cycles at 19 watts. 

  • Price in first year of sale
  • 29.95 USD
  • Mentioned in
  • -- Original prospect or advert (Heathkit 1961 May cat page 17 "New")
  • Author
  • Model page created by Glen Orriss. See "Data change" for further contributors.

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