• Country
• United States of America (USA)

• Manufacturer / Brand
• Polarad Electronics Corp.- Long Island, NY

• Year
• 1955 ??

• Category
• Service- or Lab Equipment

• Radiomuseum.org ID
• 132528

• Number of Tubes
• 2

• Valves / Tubes
• 6X4

• Wave bands
• Wave Bands given in the notes.

• Power type and voltage
• Powered by external power supply or a main unit.

• Loudspeaker
• - - No sound reproduction output.

• Material
• Metal case

• from Radiomuseum.org
• Model: Plug-In RF Tuning Unit STU-4 - Polarad Electronics Corp.-

• Notes
• Plug-in tuning unit for TSA series spectrum analyzers. Covers from 21 to 33 GHz. Waveguide input flange. Mode switching of the local oscillator occurs automatically with the rotation of the tuning dial.

• Price in first year of sale
• 2,650.00 $

• Source of data
• - - Manufacturers Literature

• Author
• Model page created by Emilio Ciardiello. See "Data change" for further contributors.

• Other Models

• Here you find 63 models, 11 with images and 2 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Polarad Electronics Corp.- Long Island, NY