• Country
• Italy

• Manufacturer / Brand
• Geloso SA; Milano

• Year
• 1967 ?

• Category
• Amateur Transmitter (only)

• Radiomuseum.org ID
• 99070

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

• Number of Tubes
• 14

• Valves / Tubes
• 12AX7 6C4 12AT7 7360 6AH6 6AH6 6CW4 6CB6 ECH81 6AH6 12BY7 6146 6146 6146

• Number of Transistors
• 2

• Semiconductors
• BC107 BC107

• Wave bands
• Wave Bands given in the notes.

• Power type and voltage
• Powered by external power supply or a main unit.

• Loudspeaker
• - - No sound reproduction output.

• Material
• Metal case

• from Radiomuseum.org
• Model: Trasmettitore G4-228 - Geloso SA; Milano

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

• Dimensions (WHD)
• 390 x 195 x 280 mm / 15.4 x 7.7 x 11 inch

• Notes
• Geloso Transmitter G4-228.
  Frequencies: 3,5-4; 7-7,5; 14-14,5; 21-21,5; 28-28,5; 28,5-29; 29-29,5; 29,5-30 MHz; Modes: SSB, DSB, CW; P_out: 150 W PEP.
  
  Trasmittente solo gamme amatoriali in SSB, DSB, CW, frequenze trasmesse 3,5-4; 7-7,5; 14-14,5; 21-21,5; 28-28,5; 28,5-29; 29-29,5; 29,5-30 MHz. Potenza di uscita 150 watt PEP. Nella apparecchiatura si trovano oltre le valvole: N.8 quarzi. Diodi: OA81, BY126, 2× OA85; diodo zener ZF30.

• Net weight (2.2 lb = 1 kg)
• 10 kg / 22 lb 0.4 oz (22.026 lb)

• Mentioned in
• Bollettino Tecnico Geloso (bollettino N. 105 del estate-autunno 1967 pag.9)

• Author
• Model page created by Giuseppe Antonio Tusini. See "Data change" for further contributors.

• Other Models

• Here you find 956 models, 803 with images and 724 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Geloso SA; Milano