Super Pro SPR-120X

Hammarlund Mfg. Co. Inc.; New York, NY

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  • Year
  • 1937–1939
  • Category
  • Commercial Receiver (may include amateur bands)
  • Radiomuseum.org ID
  • 44076

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

 Technical Specifications

  • Number of Tubes
  • 16
  • Main principle
  • Superhet with RF-stage; ZF/IF 465 kHz; 3 AF stage(s)
  • Wave bands
  • Broadcast, Short Wave(s) and Police.
  • Power type and voltage
  • Alternating Current supply (AC) / 3 taps: 105; 115; 125 Volt
  • Loudspeaker
  • Permanent or electro-dynamic (moving coil), system not known yet. / Ø 12 inch = 30.5 cm
  • Power out
  • 10 W (unknown quality)
  • Material
  • Metal case
  • from Radiomuseum.org
  • Model: Super Pro SPR-120X - Hammarlund Mfg. Co. Inc.; New
  • Shape
  • Rack
  • Dimensions (WHD)
  • 19 x 10.5 x 14.2 inch / 483 x 267 x 361 mm
  • Notes

  • Two RF amplifiers, 465 kHz IF with continuously variable bandwidth. With IF crystal filter.

    The receiver was delivered complete with 12" external speaker chassis and separate power supply unit. 

    5 Frequency bands:
    540-1160 kHz / 1,16-2,5 MHz / 2,5-5 MHz / 5-10 MHz / 10-20 MHz

    Please note the additional Information at the page of SP-100 Series Overview.

  • External source of data
  • Ernst Erb
  • Source of data
  • -- Schematic
  • Circuit diagram reference
  • Rider's Perpetual, Volume 9 = 1938 and before

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