• Country
• United States of America (USA)

• Manufacturer / Brand
• Magnetic Reference Laboratory (MRL); San Jose, CA

• Year
• 1980 ??

• Category
• Miscellaneous (Other, Various) - see notes

• Radiomuseum.org ID
• 342856

• Main principle
• Audio-Amplification

• Wave bands
• - without

• Power type and voltage
• No Power needed

• Loudspeaker
• - - No sound reproduction output.

• Material
• Special material, described in the notes.

• from Radiomuseum.org
• Model: Reproducer Calibration Tape 31J219 - Magnetic Reference Laboratory

• Notes

• 1/2” calibration tape on aluminium spool

• Author
• Model page created by Keith Ellison. See "Data change" for further contributors.

• Other Models

• Here you find 1 models, 1 with images and 0 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Magnetic Reference Laboratory (MRL); San Jose, CA