• Country
• United States of America (USA)

• Manufacturer / Brand
• Cardwell Mfg. Corp., The Allen D.: Brooklyn, NY

• Year
• 1954/1955

• Category
• Pre-stage (adaptor for SW/FM/VHF/UHF incl. built-in), Frequency converter

• Radiomuseum.org ID
• 132282

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

• Number of Tubes
• 2

• Valves / Tubes
• 6AF4 6CB6

• Main principle
• RF Converter/Adapter (not voltage converter)

• Wave bands
• Wave Bands given in the notes.

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

• Loudspeaker
• - - No sound reproduction output.

• Material
• Wooden case

• from Radiomuseum.org
• Model: ES-1 UHF Converter - Cardwell Mfg. Corp., The Allen

• Shape
• Tablemodel without push buttons, Mantel/Midget/Compact up to 14

• Notes
• The model Cardwell ES-1 is an AC operated all channel UHF Converter with the tube 6AF4 as oscillator and 6CB6 as IF amplifier. It is fed by an UHF antenna and swichable to direct feed of the VHF antenna to the output for the TV receiver antenna input.

• Literature/Schematics (1)
• Photofact Folder, Howard W. SAMS (Date 1-55, set 263, folder 5)

• Author
• Model page created by Ernst Erb. See "Data change" for further contributors.

• Other Models

• Here you find 21 models, 20 with images and 5 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Cardwell Mfg. Corp., The Allen D.: Brooklyn, NY