Number of Transistors
Semiconductors present.
Semiconductors
Main principle
Audio-Amplification
Wave bands
- without
Details
Cassette-Recorder or -Player
Power type and voltage
Alternating Current supply (AC) / 90-109; 110-125; 200-219; 220-250 Volt
Loudspeaker
- For headphones or amp.
Material
Wooden case
from Radiomuseum.org
Model: Direct Drive Cassette Stereo Deck RS-279US - Technics brand
Shape
Book-shelf unit.
Dimensions (WHD)
16.625 x 5.375 x 13.5 inch / 422 x 137 x 343 mm
Notes
A direct drive stereo hi-fi cassette deck with Dolby B. With 2 heads, 3 motors, 3 digit tape counter, Normal/Cr02 tape selector, left and right VU level meters. Jacks for microphone, phono Line input, phono Line output, DIN tape input/output socket and a jack for headphones. Connector for wired remote control.

Specification
Motors:
2-motor system 1-direct drive brushless motor for capstan drive
1-DC motor for FF/rewind drive
1-DC motor for reel table drive
Recording System : AC bias 100Hz
Erase System: AC erase
Track System: 4-track, 2-channel stereo
Tape Speed: 1⅞ ips
Frequency Response: 20-15,000 Hz (with standard tape)
20-17,000 Hz (with Cr02 tape)
Signal to Noise Ratio: Better than 50 dB (in standard operation)
Better than 60 dB (in Dolby operation)
Wow and Flutter: Less than 0.1%
Inputs :
MIC
LINE -70 dB (0.3 mV)/600-20kΩ
-30 dB (30 mV)/70kΩ
Outputs :
LINE
HEADPHONE -6 dB (500 mV) / load impedance 50K over
8Ω
Record/Playback 1-DIN connection
Power Requirements
90-109, 110-125, 200-219, 220-250 volts AC 50/60 Hz with voltage selector

Power Consumption: Approx. 30 W

Same as the National Panasonic RS-279US Direct Drive Cassette Stereo Deck.

Net weight (2.2 lb = 1 kg)
19.875 lb (19 lb 14 oz) / 9.023 kg