• Country
• United States of America (USA)

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

• Year
• 1978

• Category
• Amateur Equipment (Other, but not Key)

• Radiomuseum.org ID
• 166310

• • alternative name: Heath Company

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

• Number of Tubes
• 2

• Valves / Tubes
• 3-500Z 3-500Z

• Main principle
• Radio Frequency Amplification only

• Wave bands
• Wave Bands given in the notes.

• Power type and voltage
• Alternating Current supply (AC) / 120/240 Volt

• Loudspeaker
• - - No sound reproduction output.

• Material
• Metal case

• from Radiomuseum.org
• Model: Linear Amplifier SB-221 - Heathkit Brand, Heath Co.;

• Shape
• Tablemodel, with any shape - general.

• Dimensions (WHD)
• 14.87 x 8.25 x 14.5 inch / 378 x 210 x 368 mm

• Notes

• Identical to SB-220, but in lack of 10 meter band.
  Grounded grid linear power amplifier for 80 to 15 meters HAM bands. Driver power ca. 100 W, P_out: abt. 1200 W.

• Net weight (2.2 lb = 1 kg)
• 50 lb (50 lb 0 oz) / 22.7 kg

• Source of data
• -- Original-techn. papers.

• Mentioned in
• Heathkit: A Guide to Amateur Radio Products

• Literature/Schematics (1)
• -- Schematic

• Author
• Model page created by Hinrich Grensemann † 15.5.16. See "Data change" for further contributors.

• Other Models

• Here you find 717 models, 700 with images and 507 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)