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Tiantan 天坛 714 (714A)

Tiantan 天坛 714 ; Beijing 北京崇文广播器材厂 (ID = 804597) Radio
 
Tiantan 天坛 714 ; Beijing 北京崇文广播器材厂 (ID = 817503) Radio
 
Tiantan 天坛 714 ; Beijing 北京崇文广播器材厂 (ID = 817504) Radio
Tiantan 天坛 714 ; Beijing 北京崇文广播器材厂 (ID = 814864) Radio
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Tiantan 天坛 714 ; Beijing 北京崇文广播器材厂 (ID = 814864) Radio
Beijing 北京崇文广播器材厂: Tiantan 天坛 714 [Radio] ID = 814864 545x493
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For model Tiantan 天坛 714 (714A), Beijing 北京崇文广播器材厂 Beijing Chong Wen Broadcast Equipment Factory; Beijing :
Picture from the Transistor Radio Circuit Manual August 1981 vol. 1 of 5 (internal 03), page 171 for reference when somebody is uploading real photos and as reference for collectors, comparing models.
 
Country:  People's Republic of China
Manufacturer / Brand:  Beijing 北京崇文广播器材厂 Beijing Chong Wen Broadcast Equipment Factory; Beijing
Year: 1968 ?? Category: Broadcast Receiver - or past WW2 Tuner
Semiconductors (the count is only for transistors) 7: 3AG21 3AG21 3AG21 3AX21 3AX21 3AX22 3AX22 2AP9
Main principle Superheterodyne (common); ZF/IF 465 kHz; 3 AF stage(s)
Tuned circuits 5 AM circuit(s)
Wave bands Broadcast only (MW).
Details
Power type and voltage Dry Batteries / 6 Volt
Loudspeaker Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil)
Power out
from Radiomuseum.org Model: Tiantan 天坛 714 - Beijing 北京崇文广播器材厂 Beijing
Material Modern plastics (no Bakelite or Catalin)
Shape Very small Portable or Pocket-Set (Handheld) < 8 inch.
Dimensions (WHD) 154 x 92 x 49 mm / 6.1 x 3.6 x 1.9 inch
Notes The model Tiantan 天坛 714 or 714A (Temple of heaven) has the following key features 主要性能: Frequency range 频率范围: broadcast band 535 - 1605 kc. Sensitivity 灵敏度: < 2 mV/m. Selectivity 选择性: 12 dB N/S. Set audio output 额定功率: 50 mW (150 mW). Electric power consumption 电源消耗 at zero signal 零信号: is10 mA, at max. output 50 mA. The IF 中频频率 is 465 kc. Loudspeaker impedance is 8 ohm. 1 diode.

Manual 03 shows on page 171 the title Tiantan 天坛 714 but on the model picture we can see Tiantan 天坛 714A. Therefore we don't know which model it really is.
Mentioned in 03-Transistor Radio Circuit Manual 1981 August (1 of 5) (page 171.)
Literature/Schematics (1) 02-Radio Manual unknown date, 380 pages (page 344b.)

Model page created by Ernst Erb. See "Data change" for further contributors.



All listed radios etc. from Beijing 北京崇文广播器材厂 Beijing Chong Wen Broadcast Equipment Factory; Beijing
Here you find 3 models, 3 with images and 3 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.



  
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