• Country
• Great Britain (UK)

• Manufacturer / Brand
• Radio Instruments Ltd. & Aeronautical & General Instruments, Ltd.; London

• Year
• 1923

• Category
• Radio module pre 1926 (not a part, not a key)

• Radiomuseum.org ID
• 204712

• Number of Tubes
• 1

• Valves / Tubes

• Main principle
• Radio Frequency Amplification only

• Wave bands
• - without

• Power type and voltage
• Storage and/or dry batteries

• Loudspeaker
• - - No sound reproduction output.

• Material
• Wooden case, TUBES VISIBLE.

• from Radiomuseum.org
• Model: Variable Intervalve Reaction Unit Type C - Radio Instruments Ltd. &

• Shape
• Tablemodel, Box - most often with Lid (NOT slant panel).

• Notes
• The Radio Instruments Variable Intervalve Reaction Unit Type C with one stage of RF Amplification

• Price in first year of sale
• 7.00 GBP

• Literature/Schematics (1)
• May 5, 1923 The Wireless World & Radio Review page xliii

• Author
• Model page created by Alan Larsen. See "Data change" for further contributors.

• Other Models

• Here you find 49 models, 43 with images and 3 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Radio Instruments Ltd. & Aeronautical & General Instruments, Ltd.; London