• Country
• Great Britain (UK)

• Manufacturer / Brand
• Radio Instruments Ltd (RI)., London

• Year
• 1946

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 136855

• Number of Tubes
• 5

• Valves / Tubes
• TH41 VP41 HL42DD Pen45 UU6

• Main principle
• Superheterodyne (common); ZF/IF 450 kHz

• Wave bands
• Broadcast (MW) and Long Wave.

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

• Loudspeaker
• Permanent or electro-dynamic (moving coil), system not known yet.

• Material
• Wooden case

• from Radiomuseum.org
• Model: Airflo 451 B - Radio Instruments Ltd RI.,

• Shape
• Tablemodel, high profile (upright - NOT Cathedral nor decorative).

• Notes
• Improved Airflo 451 B;
  Dial window at front, three control knobs on right side, tube placement unproven! Also Airflo 451 and 451A models with minor differences.

• Source of data
• -- Collector info (Sammler)

• Literature/Schematics (1)
• Trader sheet 813

• Author
• Model page created by a member from A. See "Data change" for further contributors.

• Other Models

• Here you find 48 models, 42 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 (RI)., London