• Country
• United States of America (USA)

• Manufacturer / Brand
• Hammarlund Mfg. Co. Inc.; New York, NY

• Year
• 1940 ??

• Category
• Amateur-Receiver (amateur bands, may include broadcast bands)

• Radiomuseum.org ID
• 44070

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

• Number of Tubes
• 16

• Valves / Tubes
• 6K7 6K7 6L7 6J7 6K7 6SK7 6SK7 6H6 6N7 6SJ7 6SK7 6H6 6C5 6F6 6F8 6F6

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

• Loudspeaker
• - This model requires external speaker(s).

• Material
• Metal case

• from Radiomuseum.org
• Model: Receiver SP-220SX - Hammarlund Mfg. Co. Inc.; New

• Shape
• Tablemodel, with any shape - general.

• Notes
• Frequency coverage 1.25-40 MHz. For picture, see the SP-200 series model page.

• External source of data
• Ernst Erb

• Circuit diagram reference
• Rider's Perpetual, Volume 11 = ca. 1940 and before

• Mentioned in
• Communications Receivers (4th edition page 67)

• Other Models

• Here you find 144 models, 92 with images and 58 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Hammarlund Mfg. Co. Inc.; New York, NY