• Country
• United States of America (USA)

• Manufacturer / Brand
• Tompkins Radio Products; Refugio Texas

• Year
• 1968–1975

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

• Radiomuseum.org ID
• 120479

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

• Number of Transistors
• 2

• Semiconductors

• Main principle
• RF Converter/Adapter (not voltage converter); ZF/IF 1500 kHz

• Tuned circuits
• 3 AM circuit(s)

• Wave bands
• Wave Bands given in the notes.

• Details
• Converter

• Power type and voltage
• Storage and/or dry batteries / 9 Volt

• Loudspeaker
• - - No sound reproduction output.

• Material
• Metal case

• from Radiomuseum.org
• Model: Tunaverter 1450 - Tompkins Radio Products;

• Shape
• Very small Portable or Pocket-Set (Handheld) < 8 inch.

• Dimensions (WHD)
• 115 x 60 x 100 mm / 4.5 x 2.4 x 3.9 inch

• Notes

• Coverage: 144 - 150 MHz = 2 Meter
  Output:  1500 kHz

  The on/off switch also switches the output directly to car aerial or to Tunaverter output.

  For use at a radio with a ferrite antenna, there is no connection to the receiver.
  The output is coupled via a short wire or resonate antenna, for instance with a coupling Loop 2.5 " in diameter fo #20 to 32 enamel wire C = 240 pf
  L = 18 turns for 1500 KC output.

  All VHF Tunaverters have a 3-section tuning capacitor.

  This model has a fixed crystal front panel plug-in option for a fixed frequency channel. Crystals cost 5.10 USD. Slide the XTAL switch to ON for crystal-controlled frequency, or slide to the other position (not ON) to use as a standard frequency band converter.

• Price in first year of sale
• 30.00 $

• Mentioned in
• -- Original-techn. papers.

• Author
• Model page created by Ernst Erb. See "Data change" for further contributors.

• Other Models

• Here you find 10 models, 4 with images and 9 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Tompkins Radio Products; Refugio Texas