• Country
• Italy

• Manufacturer / Brand
• GBC; Milano

• Year
• 1958

• Category
• Audio Amplifier or -mixer

• Radiomuseum.org ID
• 177305

• • alternative name: Gian Bruto Castelfranchi

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

• Number of Tubes
• 4

• Valves / Tubes
• ECC83 6V6GT 6V6GT 5Y3GT

• Main principle
• Audio-Amplification

• Wave bands
• - without

• Power type and voltage
• Alternating Current supply (AC) / 110; 125; 140; 160; 220 Volt

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

• Material
• Metal case

• from Radiomuseum.org
• Model: Harmonyc SM/3399 - GBC; Milano

• Notes
• Venduto in scatola di montaggio.

• Mentioned in
• GBC Electronics, Selezione di tecnica radio-tv, n.4, maggio 1958

• Author
• Model page created by Alessandro De Poi. See "Data change" for further contributors.

• Other Models

• Here you find 487 models, 363 with images and 237 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from GBC; Milano