• Country
• United States of America (USA)

• Manufacturer / Brand
• Sargent Co., E.M.; Oakland, CA

• Year
• 1938–1940

• Category
• Commercial Receiver (may include amateur bands)

• Radiomuseum.org ID
• 127372

• Number of Tubes
• 10

• Valves / Tubes
• 6F7 6L7 6K7 6F7 6E5 6Q7 6C5 25L6 25L6 80

• Main principle
• Superheterodyne (common); ZF/IF 535 kHz

• Wave bands
• Broadcast, Long Wave and more than two Short Wave bands.

• Power type and voltage
• AC/DC-set

• Loudspeaker
• -Loudspeaker incorporated, but system not known. / Ø 8 inch = 20.3 cm

• Power out
• 5 W (unknown quality)

• Material
• Metal case

• from Radiomuseum.org
• Model: 51-MK - Sargent Co., E.M.; Oakland, CA

• Shape
• Tablemodel, with any shape - general.

• Notes
• Seven bands, 0.08 to 31MHz. RF and mixer panel trimmers. Triode section of 6F7 used as feedback amplifier for RF regenerative Q-multiplier. Marine version of the standard 51-AK model. Inconsistent data: Tube 80 is not for AC/DC.

• Price in first year of sale
• 175.00 $

• Source of data
• Communications Receivers

• Author
• Model page created by Emilio Ciardiello. See "Data change" for further contributors.

• Other Models

• Here you find 27 models, 21 with images and 5 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Sargent Co., E.M.; Oakland, CA