20 Watt Amplifier Kit A-5A

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

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  • Year
  • 1950
  • Category
  • Kit (Parts plus instruction) or building instructions only
  • Radiomuseum.org ID
  • 367596
    • alternative name: Heath Company

 Technical Specifications

  • Number of Tubes
  • 5
  • Number of Transistors
  • 5
  • Semiconductors
  • Main principle
  • Audio-Amplification
  • Wave bands
  • - without
  • Power type and voltage
  • Alternating Current supply (AC) / 117 Volt
  • Loudspeaker
  • - This model requires external speaker(s).
  • Power out
  • 20 W (undistorted)
  • Material
  • Metal case, TUBES VISIBLE
  • from Radiomuseum.org
  • Model: 20 Watt Amplifier Kit A-5A - Heathkit Brand, Heath Co.;
  • Shape
  • Chassis only or for «building in»
  • Notes

  • The finest amplifier kit we have ever offered - check the features. This inexpensive
    amplifier compates favorably with instruments costing five times as much. Nothing
    has been spared to provide the best reproduction.

    Push-pull 6L6's. • Full 20 Watts outfut. • Fully enclosed chassis. • Provisions for reluctance pick-up compensation stage.
    Cased high fidelity output transformer.
    Treble and bass boost tone controls.
    Full range of output impedances 3.2 ohms. • to 500 ohms.

    Dual tone controls for control of both treble and bass. Bass control is of the
    boost type for maximum listening pleasure. Optional preamplifier stage for use with G. E. reluctance pickup or microphone. Uses .inverse feedback to give excellent response over entire range. Tube lineup: 6SJ7 preamplifier stage, 6J5 phase splitrer stage, two 6L6's in push-pull and 5Y3 rectifier. (6SC7 as optional compensation stage).

    Uses highest quality Chicago Transformer Corporation cased output transformer with taps of 3.2, 8, 15, 60 and 500 ohms to match any speaker combination.
    Power transformer is conservatively rated for continuous operation in sound systems.
    Tone control gives maximum bass boost of 6 db ar 70 cycles. Amplifier has maximum gain of 75 db. Response within 3 db 20 to 20,000 cycles. 
    Complete with all parts, tubes and instruction manual.

    The A-5A came with pre-amplifier for GE cartridges or microphone.

     

  • Price in first year of sale
  • 23.50 USD
  • Mentioned in
  • -- Original prospect or advert (1950 Feb. Heathkit catalog page 5 "New", 1951 Jan. Heathkit catalog page 7)
  • Author
  • Model page created by Glen Orriss. See "Data change" for further contributors.

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