• Country
• United States of America (USA)

• Manufacturer / Brand
• Philbrick Researches, George A (GAP/R).; Dedham, MA

• Year
• 1952 ??

• Category
• Miscellaneous (Other, Various) - see notes

• Radiomuseum.org ID
• 163988

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

• Number of Tubes
• 2

• Valves / Tubes
• 12AX7A 12AX7A NE-2

• Wave bands
• - without

• Power type and voltage
• Powered by external power supply or a main unit. / AC/DC 6.3 & DC 300 Volt

• Loudspeaker
• - - No sound reproduction output.

• Material
• Bakelite or Plastics (type unknown)

• from Radiomuseum.org
• Model: K2-W Operational Amplifier - Philbrick Researches, George A

• Notes
• Philbrick Researches, George A (GAP/R);
  Operational Amplifier model K2-W for Analog Computer.

• Author
• Model page created by Gottfried Silberhorn. See "Data change" for further contributors.

• Other Models

• Here you find 7 models, 7 with images and 4 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Philbrick Researches, George A (GAP/R).; Dedham, MA