• Country
• United States of America (USA)

• Manufacturer / Brand
• Grommes Precision Electronics, Inc.; Chicago (IL)

• Year
• 1947

• Category
• Service- or Lab Equipment

• Radiomuseum.org ID
• 222686

• Main principle
• Audio-Amplification

• Wave bands
• - without

• Power type and voltage
• Alternating Current supply (AC)

• Loudspeaker
• Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil)

• Material
• Metal case

• from Radiomuseum.org
• Model: Signal Tracer 250 - Grommes Precision Electronics,

• Shape
• Tablemodel, low profile (big size).

• Notes
• Audible Signal Tracer.

• Source of data
• Radio Retailing (Radio & Television R.)

• Author
• Model page created by Heiko zur Mühlen. See "Data change" for further contributors.

• Other Models

• Here you find 73 models, 66 with images and 49 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Grommes Precision Electronics, Inc.; Chicago (IL)