• Country
• United States of America (USA)

• Manufacturer / Brand
• Kellogg Switchboard & Supply Co.; Chicago (IL)

• Year
• 1929 ??

• Category
• Microphone or Pick-up element

• Radiomuseum.org ID
• 143281

• • Brand: Wavemaster

• Wave bands
• - without

• Power type and voltage
• Powered by external power supply or a main unit.

• Material
• Various materials

• from Radiomuseum.org
• Model: Table Microphone T-32 - Kellogg Switchboard & Supply

• Shape
• Tablemodel, with any shape - general.

• Dimensions (WHD)
• 135 x 135 x 285 mm / 5.3 x 5.3 x 11.2 inch

• Notes
• The T-32 was manufactured for the US Army Signal Corps by Kellogg. The microphone is a single button carbon element that requires a small bias voltage. The bias voltage is supplied by the transmitter or other equipment that the T-32 was used with. Audio reproduction is communications quality. The element can be readily replaced, if necessary. The push-to-talk switch can be used to actuate the equipment that the microphone is to be used with. The T-32 dates from the late twenties and was mainly used for military communications up to WWII and sometimes even beyond into the early fifties. A popular microphone with the Signal Corps. (Western Historic Radio Museum - http://www.radioblvd.com)

• Net weight (2.2 lb = 1 kg)
• 1.3 kg / 2 lb 13.8 oz (2.863 lb)

• Source of data
• - - Data from my own collection

• Other Models

• Here you find 66 models, 25 with images and 17 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Kellogg Switchboard & Supply Co.; Chicago (IL)