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TR-712

TR-712; Sony Corporation; (ID = 603715) Radio
TR-712; Sony Corporation; (ID = 691645) Radio TR-712; Sony Corporation; (ID = 242824) Radio
TR-712; Sony Corporation; (ID = 242826) Radio TR-712; Sony Corporation; (ID = 242827) Radio
TR-712; Sony Corporation; (ID = 242829) Radio TR-712; Sony Corporation; (ID = 242830) Radio
TR-712; Sony Corporation; (ID = 262833) Radio TR-712; Sony Corporation; (ID = 827559) Radio
TR-712; Sony Corporation; (ID = 1774707) Radio TR-712; Sony Corporation; (ID = 1774708) Radio
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TR-712; Sony Corporation; (ID = 691645) Radio
Sony Corporation;: TR-712 [Radio] ID = 691645 933x615
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For model TR-712, Sony Corporation; Tokyo
 
Country:  Japan
Manufacturer / Brand:  Sony Corporation; Tokyo
Year: 1958 Category: Broadcast Receiver - or past WW2 Tuner
Semiconductors (the count is only for transistors) 7: 2T7 2T7 2T7 2T6 2T6 2T8 or. 2T6 or. 2SB52 2T8 or. 2T6 or. 2SB52 1T23 1T51
Main principle Superheterodyne (common); ZF/IF 455 kHz; 3 AF stage(s)
Tuned circuits 5 AM circuit(s)
Wave bands Broadcast only (MW).
Details
Power type and voltage Dry Batteries / 3 × 1,5 Volt
Loudspeaker Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) / Ø 12 inch = 30.5 cm
Power out 0.12 W (0.2 W max.)
from Radiomuseum.org Model: TR-712 - Sony Corporation; Tokyo
Material Plastics (no bakelite or catalin)
Shape Portable set > 8 inch (also usable without mains)
Dimensions (WHD) 11.5 x 7 x 4.5 inch / 292 x 178 x 114 mm
Notes

Two versions of this model are known with a variation in the push pull output transistors.

  1. 2SB52 PNP transistors are used in the pushpull output stage.
  2. 2T8 NPN transistors with bias provided by a 1T51 diode in the pushpull output stage.

Known case colours are, blue, bone, beige & olive green.

Ian Batty has written a very informative article on this model in the Silicon Chip magazine, March, 2017.

Net weight (2.2 lb = 1 kg) 1.5 kg / 3 lb 4.9 oz (3.304 lb)
Price in first year of sale 59.00 Dolar
Source of data -- Original prospect or advert
Mentioned in Silicon Chip, March 2017, page 90

Model page created by Hugo Sneyers. See "Data change" for further contributors.



All listed radios etc. from Sony Corporation; Tokyo
Here you find 3567 models, 3420 with images and 754 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.




  
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