• Country
• United States of America (USA)

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

• Year
• 1961–1972 ?

• Category
• Kit (Parts plus instruction) or building instructions only

• Radiomuseum.org ID
• 87677

• • alternative name: Heath Company

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

• Number of Tubes
• 3

• Valves / Tubes
• 12AT7 50C5 35W4

• Main principle
• TRF with regeneration

• Tuned circuits
• 1 AM circuit(s)

• Wave bands
• Wave Bands given in the notes.

• Power type and voltage
• Alternating Current supply (AC) / 117 Volt

• Loudspeaker
• Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) - elliptical

• Material
• Metal case

• from Radiomuseum.org
• Model: Short Wave Listeners Radio GR-81 - Heathkit Brand, Heath Co.;

• Shape
• Tablemodel, with any shape - general.

• Dimensions (WHD)
• 10 x 7 x 7 inch / 254 x 178 x 178 mm

• Notes
• Heathkit Short-Wave-Receiver GR-81.
  Frequenz coverage: 140-560 kHz, 500-1730 kHz, 1.73-7.25 MHz, 5.5-18 MHz. Kit price was 25 USD in 1965.

• Net weight (2.2 lb = 1 kg)
• 5.5 kg / 12 lb 1.8 oz (12.115 lb)

• Price in first year of sale
• 30.00 $

• Source of data
• Heathkit: A Guide to Amateur Radio Products

• Literature/Schematics (1)
• -- Schematic

• Literature/Schematics (2)
• -- Original prospect or advert

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

• Other Models

• Here you find 715 models, 699 with images and 506 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)