• Country
• Spain

• Manufacturer / Brand
• Promax; Barcelona

• Year
• 1985 ??

• Category
• Service- or Lab Equipment

• Radiomuseum.org ID
• 173042

• Number of Transistors
• Semiconductors present.

• Semiconductors

• Wave bands
• - without

• Power type and voltage
• Dry Batteries

• Loudspeaker
• - - No sound reproduction output.

• Material
• Plastics (no bakelite or catalin)

• from Radiomuseum.org
• Model: Medidor de Tierra PE-331 - Promax; Barcelona

• Shape
• Very small Portable or Pocket-Set (Handheld) < 8 inch.

• Author
• Model page created by Miguel Bravo-Cos. See "Data change" for further contributors.

• Other Models

• Here you find 188 models, 170 with images and 69 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Promax; Barcelona