4R-51

Sony Corporation; Tokyo

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Country
Japan

Manufacturer / Brand
Sony Corporation; Tokyo

Year
1966–1968

Category
Broadcast Receiver - or past WW2 Tuner

Radiomuseum.org ID
144923

Picture
Schematics

4R-51; Sony Corporation; (ID = 1683961) Radio — Sony Corporation; 4R-51 (3)

4R-51; Sony Corporation; (ID = 2698811) Radio — Sony Corporation; 4R-51 (1)

4R-51; Sony Corporation; (ID = 2698813) Radio — Sony Corporation; 4R-51 (1)

4R-51; Sony Corporation; (ID = 2698812) Radio — Sony Corporation; 4R-51 (1)

4R-51; Sony Corporation; (ID = 2698814) Radio — Sony Corporation; 4R-51 (1)

4R-51; Sony Corporation; (ID = 2698810) Radio — Sony Corporation; 4R-51 (1)

4R-51; Sony Corporation; (ID = 2698809) Radio — Sony Corporation; 4R-51 (1)

4R-51; Sony Corporation; (ID = 1505800) Radio — Sony Corporation; 4R-51 (2)

4R-51; Sony Corporation; (ID = 1505799) Radio — Sony Corporation; 4R-51 (2)

4R-51; Sony Corporation; (ID = 1505801) Radio — Sony Corporation; 4R-51 (2)

4R-51; Sony Corporation; (ID = 551977) Radio — Sony Corporation; 4R-51 (2)
Orig. Box

4R-51; Sony Corporation; (ID = 1505802) Radio — Sony Corporation; 4R-51 (2)

4R-51; Sony Corporation; (ID = 1505804) Radio — Sony Corporation; 4R-51 (2)

4R-51; Sony Corporation; (ID = 1679180) Radio — Sony Corporation; 4R-51 (1)

4R-51; Sony Corporation; (ID = 1679181) Radio — Sony Corporation; 4R-51 (1)

4R-51; Sony Corporation; (ID = 1679182) Radio — Sony Corporation; 4R-51 (1)

4R-51; Sony Corporation; (ID = 2060361) Radio — Sony Corporation; 4R-51 (1)

4R-51; Sony Corporation; (ID = 2060362) Radio — Sony Corporation; 4R-51 (1)

4R-51; Sony Corporation; (ID = 2060363) Radio — Sony Corporation; 4R-51 (1)

4R-51; Sony Corporation; (ID = 2060364) Radio — Sony Corporation; 4R-51 (1)

4R-51; Sony Corporation; (ID = 2060365) Radio — Sony Corporation; 4R-51 (1)

4R-51; Sony Corporation; (ID = 2361114) Radio — Sony Corporation; 4R-51 (1)

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

Technical Specifications

Number of Transistors
6

Semiconductors
2SA122 or. 2SA201 2SA122 or. 2SA202 2SA122 or. 2SA202 2SD64 or. 2SB186 2SB378 or. 2SB187 2SB378 or. 2SB187

Main principle
Superheterodyne (common); ZF/IF 455 kHz

Tuned circuits
5 AM circuit(s)

Wave bands
Broadcast only (MW).

Power type and voltage
Dry Batteries / AA/UM3: 4 x 1,5 Volt

Loudspeaker
Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) / Ø 2.5 inch = 6.4 cm

Power out
0.3 W (unknown quality)

Material
Plastics (no bakelite or catalin)

from Radiomuseum.org
Model: 4R-51 - Sony Corporation; Tokyo

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

Dimensions (WHD)
160 x 90 x 40 mm / 6.3 x 3.5 x 1.6 inch

Notes
6 transistor, B/C (AM), 2½" dynamic speaker. 300mW output, with earphone and leather case.

Price in first year of sale
51.60 AUS $

Mentioned in
Mingay's Price Service (Aug 1966 to Feb 1968.)

Literature/Schematics (1)
J.R. Publications Transistor Radio Service Handbook (Group C4, 1967, Page S5a.)

Author
Model page created by a member from A. See "Data change" for further contributors.

Other Models
Here you find 3991 models, 3852 with images and 956 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
All listed radios etc. from Sony Corporation; Tokyo

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

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