Fm-Am Stereo Receiver STR-1250

Gradiente Eletrônica S.A.; São Paulo

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  • Year
  • 1974 ?
  • Category
  • Broadcast Receiver - or past WW2 Tuner
  • Radiomuseum.org ID
  • 331388

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

 Technical Specifications

  • Number of Transistors
  • Semiconductors present.
  • Semiconductors
  • Main principle
  • Superheterodyne (common)
  • Wave bands
  • Broadcast (BC) and FM or UHF.
  • Details
  • Hi-Fi equipment
  • Power type and voltage
  • Alternating Current supply (AC) / 110; 220 Volt
  • Loudspeaker
  • - This model requires external speaker(s).
  • Power out
  • 64 W (undistorted)
  • Material
  • Wooden case
  • from Radiomuseum.org
  • Model: Fm-Am Stereo Receiver STR-1250 - Gradiente Eletrônica S.A.; São
  • Shape
  • Book-shelf unit.
  • Dimensions (WHD)
  • 430 x 140 x 350 mm / 16.9 x 5.5 x 13.8 inch
  • Notes

  • Inputs: Phono (moving magnet), Tape, Aux and Mic
    Output power: 2 x 32 W RMS into 8 Ω, 2 x 40 W RMS into 4 Ω
    AC outlets: 2 (110 - 220 V)

    There are different versions of this receiver, namely with the following prints on the back:

    • IGB - Amazonia S/A., Av. Assai
      Industria Brasileira, C.G.C. 04.209.912/0001-29
      Produzida na Zona Francia de Manaus
       
    • Made in Brazil

    The schematic indicates:

    • Gradiente - Receiver STR 1250 C / Monobloco Alps
  • Net weight (2.2 lb = 1 kg)
  • 10.2 kg / 22 lb 7.5 oz (22.467 lb)
  • Author
  • Model page created by Antonio Rabitti. See "Data change" for further contributors.

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Forum contributions about this model: Gradiente Eletrônica: Fm-Am Stereo Receiver STR-1250

Threads: 1 | Posts: 1

With reference to the product Gradiente model STR-1250 it was added in the text by the administrators that this model probably has Japanese parts. This is not correct. Gradiente produced this model (and others that I'll upload) entirely.
What happens is that our hi-fi audio market followed Japanese standards mainly with regard to connections.

Philips unsuccessfully tried to impose the DIN standard, but had to surrender to the market imposition created by other local hi-fi audio manufacturers (Gradiente, Polyvox, Quasar, CCE, Spectro, Gavox, Greynolds, etc.) who adopted the Japanese standard for connections .

By the way, this is one of the main explanations why Philips took a long time to take off with its high-fidelity products. Its DIN fixtures did not connect with any other equipment sold here.
 
Best regards
Antonio Rabitti

Mike Edwards † 25.10.21, 08.Aug.21

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