• Country
• United States of America (USA)

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

• Year
• 1962

• Category
• Audio Amplifier or -mixer

• Radiomuseum.org ID
• 352731

• • alternative name: Heath Company

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

• Number of Transistors
• 28

• Semiconductors
• 34422 34422 2N407 2N407 2N407 2N407 2N407 2N407 2N407 2N407 34423 34423 2N407 2N407 34715 34715 34425 34425 34425 34425 34298 34298 34298 34298 2N408 2N408 2N408 34022

• 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
• 70 W (unknown quality)

• Material
• Metal case

• from Radiomuseum.org
• Model: Transistor Stereo Amplifier AA-21 - Heathkit Brand, Heath Co.;

• Shape
• Book-shelf unit.

• Notes

• Early solid-state integrated amplifier, stereo, with driver transformers;

  see also the export version AA-21E.

• Price in first year of sale
• 134.95 USD

• Mentioned in
• Heathkit catalog 1962

• Author
• Model page created by Gottfried Silberhorn. See "Data change" for further contributors.

• Other Models

• Here you find 713 models, 697 with images and 503 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Heathkit (Brand), Heath Co.; Benton Harbor (MI)