NATIONAL RS-4250 Stereo Cassette Recorder
1 in stock
NATIONAL RS-4250
FUTURES:
- Manufactured Date 1977 Of October
- AM/FM Portable Cassette Stereo With 2-band
- 2-Way 4-Speaker System
- 2.2 W x 2 (EIAJ/DC) Output
- Timer Standby
- Fully Automatic Stop
- Rewind Auto Play
- Accessory Mounting Holes
- Mixing Play Mechanism
- Bass, Treble And Balance Adjustment
Available colours:
- Black
999.00€
1 in stock
In the late 1970s, as boomboxes were rapidly becoming more stereo, various manufacturers were releasing masterpieces with a variety of distinctive features. While there was a trend to differentiate products based on functionality and performance, I think the ST-5 was the leader in terms of design. Its design is instantly recognizable as it is unlike any boombox made by the company, let alone any made by other companies. Let’s take a closer look at the design’s features.
No matter which manufacturer, the main colors for the body of a boombox were black or gray, but most used silver for the upper control panel, cassette holder, or speaker grill.
The ST-5 uses almost no silver or accent colors, and is all black for a tough look. It’s a manly color scheme.
ELECTRIC
Power Source: AC 100V (50/60 Hz) DC 9V (6 D Batteries) Car Battery 9V (Car Adapter RP-917 Sold Separately)
Power Consumption: 11 W
Rated Output: 2.2 W × 2 (EIAC/DC)
Battery Life: Duration: Approx. 12 Hours (Using National “Neo High Top”) (4 Hours Of Continuous Recording, 15 Hours Or More Of Intermittent Recording Time With Rest Period)
Transistor Used: 2SC828 (6), 2SA838(3), 2SC644 (2), (15 stones) 2SC1684 (2), 2SC829(1), 2SC1383 (1) Use 1 C (5 stones)
RVIµPC1018C (1), M5132P (1), M5130PA (1), LA4112 (2)
Diodes Used (17 Diodes) OA90 (10), 20A90(2), 1S2473T(2), 1S2687AAT(1), SM102(1), MA1056 (1)
Rectifier used (4 Transistors): SM102(4)
Other Semiconductors (4 stones)
Head Used Motor: Recording/Playback Head (1), Erasing Head (1) DC Motor (Mechanical Governor Type) (1)
Speaker: 14 cm Cone Speaker 3.2 Ω (2), 3 cm Cone Speaker 8 Ω (2)
Recording Method: AC Bias Method (68/70kHz)
Deletion Method: AC Cancellation Method
Recording Track: 4-Track 2-Channel
Bell Display: 2 Individual Types (Level/Battery Check, Level/Tuning)
Tape Speed 4.8 cm/sec
Fast Forward/Rewind Time: 91 Seconds Or Less (Using C-60 Tape)
Recording/Playback Time: 1 Hour Round Trip (Using C-60 Tape)
Frequency Response: 50 ~ 10,000 Hz (NORMAL) 50 ~ 13,000 Hz (CrO2)
Wow And Flutter: Less Then 0.14 %
Signal-To-Noise Ratio: 50dB or more
Mixing Function: Playback Mixing Only
Input Terminal: MIC Terminal, 2 Circuits -72 dB, 0.25 mV
LINE IN Terminal 2 Circuits -24 dB, 60 mV
Output Terminal: EXT SP Terminal 2 Circuits 3.2 ~ 6 Ω
LINE OUT Terminal 2 Circuit Load Impedance 47 kΩ 0.36 V
Headphone Jack 2 Circuits 8 Ω 0.5mV
RADIO SECTION
Reception Frequency: FM 7 6~ 90 MHz AM 525 ~ 1605 kHz
Intermediate Frequency: FM 10.7 MHz AM 455 kHz
Receiving Sensitivity: FM 1.5 μV/m/50 mW(Max) AM 100 μV/m/50 mW(Max)
Weight: 6.7 kg (Including Batteries)
Dimensions: 520 mm (Width) x 272 mm (Height) x 145 mm
ACCESSORIES
Power Cord (QFC1100) x 1
Dry battery (SUM-1N) x 6
System Upgrade Screw Adapter (QAA62301) x 2
Cassette Tape (QFTC12L007NZ) x 1
Erasing Plug (QJP0959) x 2
Shoulder Belt (QYH0075) x 1
Fanback Ass’y (QFF0857) x 1
Video
Soon!
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