• Country
• United States of America (USA)

• Manufacturer / Brand
• Globe Electric Co.; Milwaukee, Wisconsin (Duodyne)

• Year
• 1926 ?

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 236189

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

• Number of Tubes
• 5

• Valves / Tubes
• UV201A UV201A UV201A UV201A UV201A

• Main principle
• TRF without regeneration; 2 AF stage(s)

• Tuned circuits
• 3 AM circuit(s)

• Wave bands
• Broadcast only (MW).

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

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

• Material
• Wooden case

• from Radiomuseum.org
• Model: DuoDyne 900S - Globe Electric Co.; Milwaukee,

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

• Dimensions (WHD)
• 21.6 x 7 x 7.5 inch / 549 x 178 x 191 mm

• Notes

•  

  The Globe DuoDyne Model 900S has a more utilitarian, less ornate case than the Model 900 but offers slightly enhanced electronics.  It allows for the interception of the audio signal at either the fourth or fifth tube in the signal string, for either headset or speaker signal, respectively.  Simple three-knob tuning, with dial markings 0-180.  All three battery voltages can be momentarily monitored on the voltmeter.

• Net weight (2.2 lb = 1 kg)
• 14.2 lb (14 lb 3.2 oz) / 6.447 kg

• Author
• Model page created by Hank Kaczmarski. See "Data change" for further contributors.

• Other Models

• Here you find 34 models, 20 with images and 1 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Globe Electric Co.; Milwaukee, Wisconsin (Duodyne)