Heterodyne-Unit K5

• Country
• Great Britain (UK)

• Manufacturer / Brand
• Sullivan, H.W., London

• Year
• 1918

• Category
• Pre-stage (adaptor for SW/FM/VHF/UHF incl. built-in), Frequency converter

• Radiomuseum.org ID
• 215671

• Picture
• Schematics

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

• Number of Tubes
• 1

• Valves / Tubes

• Main principle
• RF-Circuit or wave trap (separate, can also be an antenna with amp.)

• Wave bands
• Wave Bands given in the notes.

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

• Loudspeaker
• - For headphones or amp.

• Material
• Wooden case

• from Radiomuseum.org
• Model: Heterodyne-Unit K5 - Sullivan, H.W., London

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

• Dimensions (WHD)
• 32 x 18 x 15 mm / 1.3 x 0.7 x 0.6 inch

• Notes

• H.W. Sullivan Ltd. London. Heterodyne Unit- Type K5. Pat. No.6373

  Dual function: wavemeter and oscillator for early radio receivers.

  • Sophisticated design compared to basic wavemeters.
  • Triode valve and buzzer housed in a sturdy teak cabinet 
  • Seven plug-in coils cover 300-24,000 meter range.
  • Precise tuning with removable ivorine dials and slow-motion mechanism.
  • Early Marconi triode and A. Hesketh buzzer.
  • Remote coupling coil for external calibration.
  • Ebonite panel with controls for battery, buzzer, and connections.
  • Copper lining shields instrument from interference.

• Net weight (2.2 lb = 1 kg)
• 11.7 kg / 25 lb 12.3 oz (25.771 lb)

• Literature/Schematics (1)
• -- Schematic

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

• Other Models

• Here you find 33 models, 31 with images and 1 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Sullivan, H.W., London