• Country
• United States of America (USA)

• Manufacturer / Brand
• GTC, General Transformer Corporation; Chicago, IL

• Year
• 1935 ??

• Category
• Power supply/conditioner or battery or charger 

• Radiomuseum.org ID
• 149073

• • alternative name: GTC

• Number of Tubes
• 1

• Valves / Tubes
• 6P5GT

• Number of Transistors

• Semiconductors
• Metal-rectifier

• Wave bands
• - without

• Details
• Power Supply (not only Batt.El.)

• Power type and voltage
• Alternating Current supply (AC) / 110-120 Volt

• Loudspeaker
• - - No sound reproduction output.

• Material
• Metal case

• from Radiomuseum.org
• Model: Porta-Power U - GTC, General Transformer

• Shape
• Tablemodel, with any shape - general.

• Dimensions (WHD)
• 6 x 2 x 4 inch / 152 x 51 x 102 mm

• Notes
• GTC Porta-Power model U, Battery replacement power supply;
  Supplies 1.4 V/300 mA & 90 VDC/13.5 mA for 4 or 5 tube radios, in total 6 sockets for the majority of 4 or 5 tube farm radios.

• Author
• Model page created by a member from A. See "Data change" for further contributors.

• Other Models

• Here you find 6 models, 6 with images and 0 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from GTC, General Transformer Corporation; Chicago, IL