NATIONAL RS-4100 Stereo Radio Cassette Recorder

Power Supply: AC 100V (50/60Hz) Or DC 9V (Single Type 6 Dry Batteries)
Car Battery 12 V (Using National Car Adapter RP-917)
Power Consumption: Approx. 10 W
Maximum Practical Output: 2,000 mW x 2 (EIAJ/DC)
Transistors Used: 32 Transistors
Used Diodes: 19 Stones
Use 1C: 1 Stone
Rectifier Used: 2 Transistors
Track System: 4 Tracks, 2 Channels Stereo
Tape Speed: 4.8 cm/sec
Recording Bias Method: AC Bias
Erasing Method: Magnetic Erasure
Monitor Type: Variable Monitor
TAPE RECORDER SECTION
Frequency Response: NORMAL/ 50 ~ 10,000 Hz, CrO2/ 50 ~ 12,000 Hz
Input Impedance: MIC2 Circuit 2.2 KΩ – 72 dB (External Microphone 600 Ω)
Output Impedance: EXTSP2 Circuit 8 Ω, HEAD PHONES2 Circuits 8 Ω
Recording Time: 1 Hour (Using C-60 Round Trip)
Battery Life: Continuous Recording For Approximately 6 Hours (Using National “High Top”Batteries)
Continuous Recording Time: Approx. 9 Hours (Using National “Neo High Top” Batteries)
Speaker Used: 12 cm Dynamic Type 8 Ω x 2
Dimension: 418 mm (Width) x 229 mm (Height) x 133 mm (Depth)
Weight: Approx. 5.3kg (Including Batteries)
RADIO SECTION
Receiving Frequency Band: FM/76 ~ 90 MHz, AM/525 ~ 1605 KHz