• Country
• United States of America (USA)

• Manufacturer / Brand
• Kennedy Co., Colin B.; San Francisco & St.Louis

• Year
• 1921

• Category
• Audio Amplifier or -mixer

• Radiomuseum.org ID
• 84360

• • alternative name: Colin B. Kennedy Corp.
  • Brand: Globe Trotter

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

• Number of Tubes
• 2

• Valves / Tubes
• UV201 or C301 UV201 or C301

• Main principle
• Audio-Amplification

• Power type and voltage
• Storage and/or dry batteries

• Loudspeaker
• - For headphones or amp.

• Material
• Wooden case

• from Radiomuseum.org
• Model: 525 Amplifier - Kennedy Co., Colin B.; San

• Shape
• Tablemodel, Box - most often with Lid (NOT slant panel).

• Dimensions (WHD)
• 205 x 327 x 240 mm / 8.1 x 12.9 x 9.4 inch

• Notes

• Matching the 220 and the 110 Receiver.

• Net weight (2.2 lb = 1 kg)
• 4.7 kg / 10 lb 5.6 oz (10.352 lb)

• Source of data
• Vintage Radio 1887-1929, Greenwood's Classic Pictorial Album

• Mentioned in
• William B.Duck Catalog No.16 (1921)

• Literature/Schematics (1)
• Collector's Guide to Antique Radios (6th edition) (Radio Broadcast, June 1922, page 187)

• Author
• Model page created by Konrad Birkner † 12.08.2014. See "Data change" for further contributors.

• Other Models

• Here you find 145 models, 77 with images and 69 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Kennedy Co., Colin B.; San Francisco & St.Louis