TR-680

Crown Radio Corp.; Tokyo

Data

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Country
Japan

Manufacturer / Brand
Crown Radio Corp.; Tokyo

Year
1961

Category
Broadcast Receiver - or past WW2 Tuner

Radiomuseum.org ID
107391

- alternative name: Asahi Radio Mfg. Co., Ltd

Picture
Schematics

TR-680; Crown Radio Corp.; (ID = 2298539) Radio — Crown Radio Corp.; TR-680 (3)

TR-680; Crown Radio Corp.; (ID = 2514497) Radio — Crown Radio Corp.; TR-680 (1)

TR-680; Crown Radio Corp.; (ID = 2514505) Radio — Crown Radio Corp.; TR-680 (1)

TR-680; Crown Radio Corp.; (ID = 2514503) Radio — Crown Radio Corp.; TR-680 (1)

TR-680; Crown Radio Corp.; (ID = 2514502) Radio — Crown Radio Corp.; TR-680 (1)

TR-680; Crown Radio Corp.; (ID = 1497989) Radio — Crown Radio Corp.; TR-680 (1)

TR-680; Crown Radio Corp.; (ID = 1497990) Radio — Crown Radio Corp.; TR-680 (1)

TR-680; Crown Radio Corp.; (ID = 1497991) Radio — Crown Radio Corp.; TR-680 (1)

TR-680; Crown Radio Corp.; (ID = 1497992) Radio — Crown Radio Corp.; TR-680 (1)

TR-680; Crown Radio Corp.; (ID = 1497993) Radio — Crown Radio Corp.; TR-680 (1)

TR-680; Crown Radio Corp.; (ID = 1497994) Radio — Crown Radio Corp.; TR-680 (1)

TR-680; Crown Radio Corp.; (ID = 1497995) Radio — Crown Radio Corp.; TR-680 (1)

TR-680; Crown Radio Corp.; (ID = 1497996) Radio — Crown Radio Corp.; TR-680 (1)

TR-680; Crown Radio Corp.; (ID = 1497997) Radio — Crown Radio Corp.; TR-680 (1)

TR-680; Crown Radio Corp.; (ID = 1497999) Radio — Crown Radio Corp.; TR-680 (1)

TR-680; Crown Radio Corp.; (ID = 2304908) Radio — Crown Radio Corp.; TR-680 (1)

TR-680; Crown Radio Corp.; (ID = 294561) Radio — Crown Radio Corp.; TR-680 (2)
Q = ebay objnr: 320074157309

TR-680; Crown Radio Corp.; (ID = 294559) Radio — Crown Radio Corp.; TR-680 (2)
Q = ebay objnr: 320074157309

TR-680; Crown Radio Corp.; (ID = 294558) Radio — Crown Radio Corp.; TR-680 (2)
Q = ebay objnr: 320074157309

TR-680; Crown Radio Corp.; (ID = 294560) Radio — Crown Radio Corp.; TR-680 (2)
Q = ebay objnr: 320074157309

TR-680; Crown Radio Corp.; (ID = 261315) Radio — Crown Radio Corp.; TR-680 (2)

TR-680; Crown Radio Corp.; (ID = 846429) Radio — Crown Radio Corp.; TR-680 (1)

TR-680; Crown Radio Corp.; (ID = 1434705) Radio — Crown Radio Corp.; TR-680 (1)

TR-680; Crown Radio Corp.; (ID = 1434706) Radio — Crown Radio Corp.; TR-680 (1)

TR-680; Crown Radio Corp.; (ID = 1434707) Radio — Crown Radio Corp.; TR-680 (1)

TR-680; Crown Radio Corp.; (ID = 1434708) Radio — Crown Radio Corp.; TR-680 (1)

TR-680; Crown Radio Corp.; (ID = 1434709) Radio — Crown Radio Corp.; TR-680 (1)

TR-680; Crown Radio Corp.; (ID = 1589297) Radio — Crown Radio Corp.; TR-680 (1)

TR-680; Crown Radio Corp.; (ID = 1589298) Radio — Crown Radio Corp.; TR-680 (1)

TR-680; Crown Radio Corp.; (ID = 1589299) Radio — Crown Radio Corp.; TR-680 (1)

TR-680; Crown Radio Corp.; (ID = 1656615) Radio — Crown Radio Corp.; TR-680 (2)

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

Technical Specifications

Number of Transistors
6

Semiconductors
2SA152 2SA12 2SA12 2SB75 2SB156 2SB156

Main principle
Superheterodyne (common); ZF/IF 455 kHz; 2 AF stage(s)

Tuned circuits
5 AM circuit(s)

Wave bands
Broadcast only (MW).

Power type and voltage
Dry Batteries / 2 x 1.5 Volt

Loudspeaker
Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) / Ø 5.7 cm = 2.2 inch

Power out
0.1 W (unknown quality)

Material
Plastics (no bakelite or catalin)

from Radiomuseum.org
Model: TR-680 - Crown Radio Corp.; Tokyo

Shape
Very small Portable or Pocket-Set (Handheld) < 8 inch.

Dimensions (WHD)
65 x 90 x 30 mm / 2.6 x 3.5 x 1.2 inch

Notes
This model TR-680 was also distributed by other brands, like for instance here by SEMP, Brasilia.

Note: The attached schematic has been corrected to show a Hitachi HV15 diode instead of a direct connection to ground.

Net weight (2.2 lb = 1 kg)
0.2 kg / 0 lb 7 oz (0.441 lb)

Literature/Schematics (1)
Transistor Radios (by David R. Lane & Robert A. Lane. p. 38)

Author
Model page created by Peter Hoddow. See "Data change" for further contributors.

Other Models
Here you find 369 models, 337 with images and 98 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
All listed radios etc. from Crown Radio Corp.; Tokyo

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The model is part of the collections of the following members.

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