• Country
• United States of America (USA)

• Manufacturer / Brand
• Federated Purchaser, Inc. (Acratone, Acratest); New York City (NY)

• Year
• 1934

• Category
• Power supply/conditioner or battery or charger 

• Radiomuseum.org ID
• 31162

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

• Number of Tubes
• 1

• Valves / Tubes
• 25Z5

• Power type and voltage
• AC/DC-set / 110 Volt

• Loudspeaker
• - - No sound reproduction output.

• from Radiomuseum.org
• Model: Acratest Power Supply 85 - Federated Purchaser, Inc.

• Notes
• Independent Exciter power supply for an electrodynamic speaker.

• External source of data
• Ernst Erb

• Circuit diagram reference
• Rider's Perpetual, Volume 7 = 1936 and before

• Other Models

• Here you find 209 models, 126 with images and 88 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Federated Purchaser, Inc. (Acratone, Acratest); New York City (NY)