• Country
• United States of America (USA)

• Manufacturer / Brand
• J.M.P. Mfg. Co.

• Year
• 1931

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

• Radiomuseum.org ID
• 45155

• Wave bands
• Short Wave (SW only)

• Loudspeaker
• - - No sound reproduction output.

• from Radiomuseum.org
• Model: Submariner - J.M.P. Mfg. Co.

• Shape
• Tablemodel, slant panel.

• Notes
• Adapter The Submariner is shown with the title "Short wave with your present radio" in "Radio News", March 1931 on page 840. They are priced from $ 17.50 to $ 27.50, with fixed wave band of 19 - 50 meters, or interchangeable coils of 13 - 145 meters. The "J" feature, an exclusive "Submariner" acvhievement, enables you to get superior results with all of the newest receivers. The models JA7Y, 19 - 50 meters, at $ 22.50, or the JIA7Y, 13 - 145 meters, at $ 27.50, have a tremendous wallop when attached to the new screen grid super-heterodyne receivers.

• External source of data
• Ernst Erb

• Source of data
• Radio Collector`s Guide 1921-1932

• Literature/Schematics (4)
• Radio News (March 1931, page 840, ad with picture.)

• Other Models

• Here you find 4 models, 1 with images and 0 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from J.M.P. Mfg. Co.