• Country
• United States of America (USA)

• Manufacturer / Brand
• Johnson Company, E.F.; Waseca, MN

• Year
• 1960 ??

• Category
• Antenna (Aerial) or Coupler

• Radiomuseum.org ID
• 219643

• • Brand: Viking

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

• 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
• No Power needed

• Loudspeaker
• - - No sound reproduction output.

• from Radiomuseum.org
• Model: Kilowatt Matchbox 250-30 - Johnson Company, E.F.; Waseca,

• Notes
• E.F. Johnson advertising description: Kilowatt Matchbox – Band switching 80, 40, 20, 15 and 10-11 meters – self-contained. Use with transmitters up to 1000 watts input - handles unbalanced line, impedances from 50 to 1200 ohms and balanced line impedances from 50 to 2000 ohms. No coils to change, no “tapping down” on the inductor. Fully Shielded. Provision for RF probe. Not wired for directional coupler and indicator.

• Price in first year of sale
• 125.00 $

• Literature/Schematics (1)
• July 1960 QST Magazine

• Other Models

• Here you find 66 models, 56 with images and 29 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Johnson Company, E.F.; Waseca, MN