• Country
• United States of America (USA)

• Manufacturer / Brand
• Homebrew - ORIGINAL, USA

• Year
• 1934

• Category
• Amateur-Receiver (amateur bands, may include broadcast bands)

• Radiomuseum.org ID
• 279789

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

• Number of Tubes
• 3

• Valves / Tubes
• 34 33 19

• Main principle
• TRF with regeneration; 1 AF stage(s)

• Tuned circuits
• 2 AM circuit(s)

• Wave bands
• Short Wave (SW only)

• Power type and voltage
• Batteries / addl. power jack / 90 67.5 -4.5 2 Volt

• Loudspeaker
• - only for Earphone!

• Material
• Metal case

• from Radiomuseum.org
• Model: Johnson's Book of Radio - Homebrew - ORIGINAL, USA

• Shape
• Miscellaneous shapes - described under notes.

• Notes

• This 3 tube radio described in Shortwave Craft for December 1934 comprises an external Antenna Coupling circuit which can be switched to either a two tube regenerative receiver or a single tube Duo Amplifying receiver. 

  The radio is constructed in a book style box with the C battery inside.

  The antenna coupling unit, A and B batteries are external.

• Literature/Schematics (1)
• Shortwave Craft for December 1934, Page 470

• Author
• Model page created by Gary Cowans. See "Data change" for further contributors.

• Other Models

• Here you find 36 models, 20 with images and 5 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Homebrew - ORIGINAL, USA