• Country
• Spain

• Manufacturer / Brand
• Optimus; Gerona

• Year
• 1955

• Category
• Audio Amplifier or -mixer

• Radiomuseum.org ID
• 98052

• • alternative name: Pla Hermanos y Cía

Click on the schematic thumbnail to request the schematic as a free document.

• Number of Tubes
• 8

• Valves / Tubes
• EF86 EF86 EF86 EF86 ECC83 EL84 EL84 GZ34

• Main principle
• Audio-Amplification

• Wave bands
• - without

• Power type and voltage
• Alternating Current supply (AC) / 110; 125; 150 Volt

• Loudspeaker
• - This model requires external speaker(s).

• Power out
• 10 W (unknown quality)

• Material
• Metal case

• from Radiomuseum.org
• Model: 137-AF - Optimus; Gerona

• Shape
• Chassis only or for «building in»

• Notes
• Dos unidades, previo de tres válvulas (modelo 142AF) con las entradas y mandos y amplificador con 5 válvulas. Two units: 3 tube Preamp (model 142AF) and 5 tube Power amplifier.

• Price in first year of sale
• 7,031.00 ESP

• Source of data
• -- Original prospect or advert

• Literature/Schematics (1)
• -- Schematic

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

• Other Models

• Here you find 197 models, 134 with images and 98 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Optimus; Gerona