• Country
• United States of America (USA)

• Manufacturer / Brand
• Triplett Electrical Instrument Co.; Bluffton (OH)

• Year
• 1934 ??

• Category
• Service- or Lab Equipment

• Radiomuseum.org ID
• 214365

• Number of Tubes
• 0

• Valves / Tubes
• unknown_Tube

• Wave bands
• Wave Bands given in the notes.

• Power type and voltage
• Dry Batteries

• Loudspeaker
• - - No sound reproduction output.

• Material
• Leather / canvas / plastic - over other material

• from Radiomuseum.org
• Model: Service Test Oscillator 321 - Triplett Electrical Instrument

• Shape
• Portable set > 8 inch (also usable without mains)

• Notes
• Oscillator in four ranges for Broadcast (550...1700 kHz), Intermediate (110...550 kHz), and SW, attenuator, switchable modulation source. Combined with a VOM.

• Author
• Model page created by Gottfried Silberhorn. See "Data change" for further contributors.

• Other Models

• Here you find 143 models, 136 with images and 55 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Triplett Electrical Instrument Co.; Bluffton (OH)