For model LW/MW/FM Stereo Tuner RT-850AL, Rotel, The, Co., Ltd.; Tokyo:

Country: Japan
Manufacturer / Brand: Rotel, The, Co., Ltd.; Tokyo
Year: 1990 Category: Broadcast Receiver - or past WW2 Tuner
Semiconductors (the count is only for transistors) Semiconductors present.
Main principle PLL, Phase-locked loop
Wave bands Broadcast, Long Wave and FM or UHF.
Details Hi-Fi equipment
Power type and voltage Alternating Current supply (AC) / 220; 240 Volt
Loudspeaker - For headphones or amp.
Power out
from Radiomuseum.org Model: LW/MW/FM Stereo Tuner RT-850AL - Rotel, The, Co., Ltd.; Tokyo
Material Metal case
Shape Book-shelf unit.
Dimensions (WHD) 444 x 66 x 329 mm / 17.5 x 2.6 x 13 inch
Notes
An AM/FM stereo synthesizer tuner covering LW, MW and FM housed in a black metal case with a digital frequency display. With 8 station push buttons each of which can retrieve one stored FM and one stored MW/LW radio station, Memory button, push buttons for Tuning up and Tuning Down, FM Auto-Tuning, FM Mute Off/Mono, AM bandwidth (Narrow/Wide), Bands (MW, LW, FM), 5 signal strength LED indicators, indicators for Memory and Stereo, adjustable clip-on loop aerial on the back, connections for AM and FM antennae and RCA phono Line Output sockets.

Specification
FM Tuner Section
Usable Sensitivity (mono) 5dBf / 0.95µV (75Ω)
50dB Quieting Sensitivity Mono 8.8dBf / 1.5µV (75Ω)
Stereo 31.2dBf / 20µV (75Ω)
Signal-to-Noise Ratio (at 65dBf) Mono 80dB
Stereo 75dB
Harmonic Distortion (at 65dBf) 1 kHz 0.07% (mono), 0.25% (stereo)
Frequency Response 30-15,000Hz ,+1dB, -1dB
Capture Ratio 1.0dB
Alternate Channel Selectivity (±400kHz) 63dB
Spurious Response Rejection 95dB
Image Response Ratio 70dB
IF Response Ratio 95dB
AM Suppression Ratio 58dB
Stereo Separation 100Hz/1kHz/10kHz,
43dB/46dB/38dB)
Antenna 75Ω unbalanced
AM Tuner Section
Sensitivity MW: 350µV/m, LW: 750µV/m
Selectivity Wide/Narrow MW: 27dB / 42dB, MW: 25dB / 40dB
Signal-to-Noise Ratio 60dB
Image Response Ratio 40dB
IF Response Ratio 40dB
Antenna Loop antenna
Versions/Power Requirements
220V AC 50Hz
240V AC 50Hz

Power Consumption 10 watts

Similar to the RT-850A model which does not have Long Wave.

Net weight (2.2 lb = 1 kg) 3.9 kg / 8 lb 9.4 oz (8.59 lb)