4 Transistors RP 1270 TRF (Geradeaus)

Sanyo Electric Co. Ltd.; Moriguchi (Osaka)

Data

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Country
Japan

Manufacturer / Brand
Sanyo Electric Co. Ltd.; Moriguchi (Osaka)

Year
1985–1990

Category
Broadcast Receiver - or past WW2 Tuner

Radiomuseum.org ID
90107

Picture
Schematics

4 Transistors RP 1270; Sanyo Electric Co. (ID = 1845989) Radio — Sanyo Electric Co. 4 Transistors RP 1270 (1)

4 Transistors RP 1270; Sanyo Electric Co. (ID = 1845993) Radio — Sanyo Electric Co. 4 Transistors RP 1270 (1)

4 Transistors RP 1270; Sanyo Electric Co. (ID = 1845992) Radio — Sanyo Electric Co. 4 Transistors RP 1270 (1)

4 Transistors RP 1270; Sanyo Electric Co. (ID = 1264086) Radio — Sanyo Electric Co. 4 Transistors RP 1270 (1)

4 Transistors RP 1270; Sanyo Electric Co. (ID = 1264085) Radio — Sanyo Electric Co. 4 Transistors RP 1270 (1)

4 Transistors RP 1270; Sanyo Electric Co. (ID = 1070587) Radio — Sanyo Electric Co. 4 Transistors RP 1270 (1)

4 Transistors RP 1270; Sanyo Electric Co. (ID = 540055) Radio — Sanyo Electric Co. 4 Transistors RP 1270 (2)
1985 Sanyo Portables (German & French)

4 Transistors RP 1270; Sanyo Electric Co. (ID = 178816) Radio — Sanyo Electric Co. 4 Transistors RP 1270 (1)

4 Transistors RP 1270; Sanyo Electric Co. (ID = 1264087) Radio — Sanyo Electric Co. 4 Transistors RP 1270 (1)

4 Transistors RP 1270; Sanyo Electric Co. (ID = 1264088) Radio — Sanyo Electric Co. 4 Transistors RP 1270 (1)

4 Transistors RP 1270; Sanyo Electric Co. (ID = 1667765) Radio — Sanyo Electric Co. 4 Transistors RP 1270 (1)

4 Transistors RP 1270; Sanyo Electric Co. (ID = 1667766) Radio — Sanyo Electric Co. 4 Transistors RP 1270 (1)

4 Transistors RP 1270; Sanyo Electric Co. (ID = 1802928) Radio — Sanyo Electric Co. 4 Transistors RP 1270 (1)

4 Transistors RP 1270; Sanyo Electric Co. (ID = 2053490) Radio — Sanyo Electric Co. 4 Transistors RP 1270 (1)
from my collection

4 Transistors RP 1270; Sanyo Electric Co. (ID = 2066617) Radio — Sanyo Electric Co. 4 Transistors RP 1270 (1)
from my collection

4 Transistors RP 1270; Sanyo Electric Co. (ID = 1845990) Radio — Sanyo Electric Co. 4 Transistors RP 1270 (1)

4 Transistors RP 1270; Sanyo Electric Co. (ID = 1845991) Radio — Sanyo Electric Co. 4 Transistors RP 1270 (1)

4 Transistors RP 1270; Sanyo Electric Co. (ID = 1161139) Radio — Sanyo Electric Co. 4 Transistors RP 1270 (1)

4 Transistors RP 1270; Sanyo Electric Co. (ID = 1161145) Radio — Sanyo Electric Co. 4 Transistors RP 1270 (1)

4 Transistors RP 1270; Sanyo Electric Co. (ID = 2356163) Radio — Sanyo Electric Co. 4 Transistors RP 1270 (1)

4 Transistors RP 1270; Sanyo Electric Co. (ID = 2356164) Radio — Sanyo Electric Co. 4 Transistors RP 1270 (1)

4 Transistors RP 1270; Sanyo Electric Co. (ID = 2356165) Radio — Sanyo Electric Co. 4 Transistors RP 1270 (1)

4 Transistors RP 1270; Sanyo Electric Co. (ID = 2356166) Radio — Sanyo Electric Co. 4 Transistors RP 1270 (1)

4 Transistors RP 1270; Sanyo Electric Co. (ID = 2356167) Radio — Sanyo Electric Co. 4 Transistors RP 1270 (1)

4 Transistors RP 1270; Sanyo Electric Co. (ID = 2356168) Radio — Sanyo Electric Co. 4 Transistors RP 1270 (1)

4 Transistors RP 1270; Sanyo Electric Co. (ID = 2356169) Radio — Sanyo Electric Co. 4 Transistors RP 1270 (1)

4 Transistors RP 1270; Sanyo Electric Co. (ID = 2356170) Radio — Sanyo Electric Co. 4 Transistors RP 1270 (1)

4 Transistors RP 1270; Sanyo Electric Co. (ID = 2551971) Radio — Sanyo Electric Co. 4 Transistors RP 1270 (1)

4 Transistors RP 1270; Sanyo Electric Co. (ID = 2551972) Radio — Sanyo Electric Co. 4 Transistors RP 1270 (1)

4 Transistors RP 1270; Sanyo Electric Co. (ID = 2551973) Radio — Sanyo Electric Co. 4 Transistors RP 1270 (1)

Technical Specifications

Number of Transistors
3

Semiconductors
TA7642 2SC9014 2SC9015 PE8050

Main principle
TRF (Tuned-Radio-Frequency but use of regeneration unknown)

Tuned circuits
1 AM circuit(s)

Wave bands
Broadcast only (MW).

Power type and voltage
Dry Batteries / AA: 2 x 1.5 Volt

Loudspeaker
Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) / Ø 5.6 cm = 2.2 inch

Power out
0.15 W (unknown quality)

Material
Plastics (no bakelite or catalin)

from Radiomuseum.org
Model: 4 Transistors RP 1270 [TRF ] - Sanyo Electric Co. Ltd.;

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

Dimensions (WHD)
103 x 75 x 33 mm / 4.1 x 3 x 1.3 inch

Notes
Sanyo RP-1270, here as a TRF receiver where the ferrite rod acts as the only tunable circuit. Therefore without IF section.
Different color versions known, Made in China.

See also both superheterodyne models Sanyo RP-1270 (6 transistors) and RP-1270 (single IC).

The IC TA7642 acts as the TRF amplifier.

El circuito integrado TA7642, amplifica la RF sintonizada

Net weight (2.2 lb = 1 kg)
0.135 kg / 0 lb 4.8 oz (0.297 lb)

Mentioned in
-- Original prospect or advert (1985 Sanyo Portables (German & French))

Author
Model page created by Howard Craven. See "Data change" for further contributors.

Other Models
Here you find 1722 models, 1548 with images and 463 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
All listed radios etc. from Sanyo Electric Co. Ltd.; Moriguchi (Osaka)

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The model 4 Transistors is part of the collections of the following members.

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