Technics ST-K 808

Technics Quartz Synthesizer FM/AM Stereo Tuner Preamplifier ST-K 808

Specifications

Amplifier Section

Total Harmonic Distortion:  0,05%

Input Sensitivity/Impedance:

Phono :  2,5 mV/47 k Ω

Aux :  150 mV/27 k Ω

Tape Rec/Play :  180 mV/27 k Ω

Phono Max. Input Voltage (1 kh, RMS):  95 mV

Signal-to-Noise Ratio (rated output , 4 Ω):

Phono :  75 dB (IHF-A, 78 dB)

Tuner, Aux, Tape :  85 dB (IHF-A, 97 dB)

Signal-to-Noise Ratio (26 dB rated output, 4 Ω):

Phono : 62 dB

Tuner, Aux, Tape :  63 dB

Frequency Response:

Phono :  RIAA standard curve, 30 Hz - 15 kHz (±1,0 dB)

Tuner, Aux, Tape :  10 Hz - 50 kHz (- 1 dB); 20 Hz - 20 kHz (±0,4 dB)

Tone Controls

Bass : +10 dB: -10 dB  at 50 Hz

Treble :  +10 dB: -10 dB at 20 kHz

Subsonic Filter:  30 Hz, 6 dB/cot

High-Cut Filter:  7 kHz, 6 dB/oct

Loudness Control (volume at 30 dB):  50 Hz, - 9 dB

Output Voltage:

Output :  rated 0,5 V/600 Ω; max 10 V/600 Ω

Tape Rec/Play :  30 mV/82 k Ω

Channel Balance, Aux 250 Hz-6,300 Hz :  ±1,0 dB

Channel Separation, Aux 1 kHz :  55 dB

FM Tuner Section

Frequency Range:  87,5 - 108,0 MHz

Sensitivity:  1,9 µV (IHF, usable)

S/N 30 dB :  1,9 µV (300 Ω); 1,3 µV (75 Ω)

S/N 26 dB :  1,7 µV (300 Ω); 1,2 µV (75 Ω)

S/N 20 dB :  1,5 µV (300 Ω); 0,9 µV (75 Ω)

IHF 46 dB Srereo Quieting Sensitivity [mono/stereo]:  0,15% / 0,3%

Signal-to-Noise Ratio [mono/stereo]:  67 dB (73 dB, IHF) / 63 dB (68 dB, IHF)

Frequency Response:  20 Hz - 15 kHz, +0,5 dB, -1,5 dB

Alternate Channel Selectivity:  75 dB

Capture Ratio: 1,0 dB

Image Rejection at 98 MHz:  68 dB

IF Rejection at 98 MHz:  85 dB

Spurious Response Rejection at 98 MHz:  95 dB

AM Suppression:  55 dB

Stereo Separation:

At 1 kHz : 45 dB

At 10 kHz :  35 dB

Carrier Leak

At 19 kHz :  30 dB (35 dB, IHF)

At 38 kHz :  45 dB (50 dB, IHF)

Channel Balance (250 Hz - 6,300 Hz):  ±1,0 dB

Limiting Point:  1,2 µV

Power Bandwidth:

IF Amplifier :  180 kHz

FM Demodulator :  1000 kHz

Antenna Terminals:  300 Ω (balanced) and 75 Ω (unbalanced)

AM Tuner Section

Frequency Range:  522 - 1611 kHz

Sensitivity (S/N 20 dB):  30 µV, 300 µV/m

Selectivity (±9 kHz):  55 dB

Image Rejection at 1,000 kHz:  45 dB

IF rejection at 1,000 kHz:  45 dB

Timer Section

Clock:  Quartz-Lock Type, 24-hour indication

Precision:  within 0 sec - 10 sec monthly (at 25°C)

Functions:  24-hour programmable; every day (2 times), once only (1 time)

Programmable Content:  on off of program source (FM, AM, Phono, Aux)

Setting Intervals:  1 minute,23 hours, 59 minutes (at 1-min. Intervals)

Prioryty Order:  once, every day 2, everyday 1

Memory "back-up":  About 3 months (without AC power)

General

Power Supply:  110, 120, 220, 240 V AC, 50/60 Hz

Power Consumption:  20 W

Batteries for memory back-up (optional):  3 x AA size batteries DC 4,5 V

Dimensions (W x H x D):  430 x 75 x 310 mm (16-15/16" x 2-15/16" x 12-7/32")

Weight:  4,8 kg (10,6 lb)