NATIONAL RS-457 Stereo Cassette Recorder

ELECTRIC
Power Source: AC 100V (50/60 Hz) DC 9V (6 AA Batteries) Car Battery 9V (Car Adapter RP-915 Sold Separately)
Power Consumption: 13 W
Practical Maximum Output: 1.5 W × 2 (EIAC Distortion Rate 10 %)
Battery Life: Duration: Approx. 6 Hours (Using National “Neo High Top”) 12 Hours Of Continuous Recording.
Transistor Used: 2SC763CD (1), 2SC738CD (1), 2SC710C (1), 2SC1383RST (1), 2SC1312YG (2), 2SC828RS (6). 2SC945Q (4), 2SB324GHI (4), 2SC1317RS (2), 2SC1383RST (1)
Use 1C (4 Stones): AN260(1), M5132P (1), M5130P (1), M5138P (1)
Diodes Used (18 Diodes) SC15 (1), OA90Z (10), 20A90(2), MZ207B (1), KB265A (1), 1S1211(2), QVDSRIK1 (1)
Rectifier Used (2 Transistors): 10DC1 (1), 10DC1R (1)
Thermistor Used (2 Pieces): QVM800B (2)
Head Used Motor: Recording/Playback Head (1), Erasing Head (1)
Motor Used: DC Motor (Mechanical Governor Type(Speed Adjustable))
Speaker: 10 cm Round Dynamic Speaker 8 Ω (2), 5 cm Round Cone Speaker 8 Ω (2)
Recording Method: AC Bias Method (70 kHz)
Deletion Method: AC Cancellation Method
Recording Track: 4-Track 2-Channel Stereo
Monitor Method: Perfect Variable Monitor System
Level Display: 2 Individual Types (Level/Battery Check, Level/Tuning)
Tape Speed 4.8 cm/sec
Frequency Response: 50 ~ 10,000 Hz (NORMAL) 50 ~ 13,000 Hz (CrO2)
Wow And Flutter: Less Then 0.15 %
Signal-To-Noise Ratio: 40 dB or more
Fast Forward/Rewind Time: 120 Seconds Or Less (Using C-60 Tape)
Recording/Playback Time: 1 Hour Round Trip (Using C-60 Tape)
Mixing Function: Recording And Playback Possible
Input Terminal: MIC Terminal, 2 Circuits, 2.2 Ω -73 dB, 0.22 mV. (Recommended Microphone RP-3510E)
LINE IN Terminal 2 Circuits 220 kΩ -30 dB, 30 mV
Output Terminal: EXT SP Terminal 2 Circuits 8 Ω
LINE OUT Terminal 2 Circuit Load Impedance 5.6 kΩ
Headphone Jack 2 Circuits 8 Ω
Recording/Playback (DIN) Terminal: Based On REC/P.B CES Standards
RADIO SECTION
Reception Frequency: FM 76 ~ 90 MHz AM 525 ~ 1605 kHz
Intermediate Frequency: FM 10.7 MHz AM 455 kHz
Receiving Sensitivity: FM 3 μV/m/50 mW(Max) AM 100 μV/m/50 mW(Max)
Weight: 5.4 kg (Including Batteries)
Dimensions: 377 mm (Width) x 246 mm (Height) x 134.5 mm
ACCESSORIES
Power Cord (QFC1064) x 1
Dry battery (SUM-1D) x 6
Cassette Tape (QFT6TCCNDEZ) x 1
Fun Pack Ass’y (QFF0236) x 1