Transistor Radio 8TP2 Ch= 7RT1 brown

Raytheon Mfg. Co.; Cambridge, MA

  • Year
  • 1955/1956
  • Category
  • Broadcast Receiver - or past WW2 Tuner
  • Radiomuseum.org ID
  • 229190

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

 Technical Specifications

  • Number of Transistors
  • 7
  • Main principle
  • Superheterodyne (common); ZF/IF 455 kHz; 3 AF stage(s)
  • Tuned circuits
  • 5 AM circuit(s)
  • Wave bands
  • Broadcast only (MW).
  • Power type and voltage
  • Dry Batteries / 4x1,5 Volt
  • Loudspeaker
  • Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil)
  • Material
  • Leather / canvas / plastic - over other material
  • from Radiomuseum.org
  • Model: Transistor Radio 8TP2 Ch= 7RT1 [brown] - Raytheon Mfg. Co.; Cambridge,
  • Shape
  • Portable set > 8 inch (also usable without mains)
  • Dimensions (WHD)
  • 9.25 x 7 x 2.75 inch / 235 x 178 x 70 mm
  • Notes
  • Soon after the 8TP-series was in production, a new 7-transistor 1-diode circuitry was introduced, the 7RT1.
    Only 3 RF-transistors (instead of 5 in the original 8RT1 circuit) were used for 
    oscillator-, mixer-, and the one-transistor IF-stage. Followed by: diode detector, 1st AF-stage, AF driver and the 2-transistor push-pull output stage.

    The 7RT1 chassis was actually the original 8TP-chassis, with one transistor socket intentionally not assembled.
    This was modified in the 7RT1B-chassis

    Late units were equipped with 3x CK760, 1N295, 2N130, 2N132, 2x2N138

    Available colours: 8TP1 (tan), 8TP2 (brown), 8TP3 (beige) and 8TP4 (red)

  • Net weight (2.2 lb = 1 kg)
  • 1.650 kg / 3 lb 10.1 oz (3.634 lb)
  • Literature/Schematics (1)
  • Milton S. Kiver Transistors in Radio, Television and Electronics 2nd Edition 1959 p.170

 Collections | Museums | Literature

Collections

The model Transistor Radio 8TP2 is part of the collections of the following members.

 Forum