Tiantan 天坛 TTB

Beijing 北京崇文广播器材厂 Beijing Chong Wen Broadcast Equipment Factory; Beijing

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  • Year
  • 1972 ??
  • Category
  • Broadcast Receiver - or past WW2 Tuner
  • Radiomuseum.org ID
  • 181090

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 465 kHz; 3 AF stage(s)
  • Tuned circuits
  • 5 AM circuit(s)
  • Wave bands
  • Broadcast only (MW).
  • Power type and voltage
  • Dry Batteries / 6 Volt
  • Loudspeaker
  • Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil)
  • Material
  • Plastics (no bakelite or catalin)
  • from Radiomuseum.org
  • Model: Tiantan 天坛 TTB - Beijing 北京崇文广播器材厂 Beijing
  • Shape
  • Portable set > 8 inch (also usable without mains)
  • Notes
  • The model Tiantan 天坛 TTB (Temple of heaven) has the following key features 主要性能: Frequency range 频率范围: broadcast band 525 - 1605 kc. Sensitivity 灵敏度: < 1 mV/m. Selectivity 选择性: 14 dB N/S. Set audio output 额定功率: 150 mW (250 mW). Electric power consumption 电源消耗 at zero signal 零信号: is20 mA, at max. output 80 mA. The IF 中频频率 is 465 kc. Loudspeaker impedance is 8 ohm. 4 diodes.
  • Author
  • Model page created by Ernst Erb. See "Data change" for further contributors.

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