• Country
• United States of America (USA)

• Manufacturer / Brand
• Altec Lansing Corp.; Oklahoma City (OK)

• Year
• 1950–1966

• Category
• Microphone or Pick-up element

• Radiomuseum.org ID
• 214789

• Wave bands
• - without

• Power type and voltage
• No Power needed

• Loudspeaker
• - For headphones or amp.

• Material
• Metal case

• from Radiomuseum.org
• Model: Moving Coil Dynamic Microphone 633 A - Altec Lansing Corp.; Oklahoma

• Shape
• Miscellaneous shapes - described under notes.

• Dimensions (WHD)
• 2 x 3.5 x 2 inch / 51 x 89 x 51 mm

• Notes
• Moving coil dynamic microphone.
  Frequency Response: 35 to 12,000 cycles,
  Output Impedance: 633A 30/50 ohms,
  Output Level: −55 dBm/10 dynes/cm²,
  3.5 inches long, 2 inches diameter,
  Instrument gray finish.

• Net weight (2.2 lb = 1 kg)
• 10 lb 0 oz (10 lb) / 4.540 kg

• Mentioned in
• - - Manufacturers Literature (Altec Instructions 3/1966)

• Author
• Model page created by Paulo Figueiredo. See "Data change" for further contributors.

• Other Models

• Here you find 100 models, 98 with images and 34 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Altec Lansing Corp.; Oklahoma City (OK)