Technics SA-828

Quartz synthesizer digital tuning provides exact and drift-free reception. A choice of three tuning modes: 14 preset stations (7 FM and 7 AM), up/down manual, and auto-scan. Digital frequency readout plus analog display. LEDs for signal strength, quartz-lock and preset channels. New Class A and Linear feedback amplifier design. Space Dimension Control expands the stereo image to a maximum of 240°. Dimension and power level dispaly. Input-capacitorless phono equalizer first stage allows direct MC cartridge connection. Electronic protection circuit. Protection/safety indicators. Two-way tape dubbing IF band selector. Soft touch volume control.

Beyond quartz, the world's most precise tuning system, lies a new ability to expand sound.

Imagine you're in a room with Technics SA-828 receiver.

What you hear is beautiful stereo. Then you activate Technics variable Dimension Control. Incredibly, the sound begins to move. The stereo image widens to the point where the music begins to surround you. You're intrigued by its richness and depth. You're enveloped by a new experience in sound. That's the wonder of the patented technology in Technics Dimension Control.

Just as wondrous is quartz synthesis, the world's most precise tuning system. That's how the SA-828 quartz synthesizer eliminates FM drift as well as the hassle of tuning. You can even preset and instantly retrive 7 FM and 7 AM stations, all perfectly in tune.

Another perfect example of Technics technology is our synchro-bias circuitry. What it does is constantly  send minute amounts of power to the amplifier transistors. And since they can't switch on or off, switching distortion is eliminated.

And when it comes to power, thr SA828 has plenty;  100 watts per channel minimum RMS into 8 ohms from 20 Hz to 20 kHz with no more than 0,005% total harmonic distortion.

The SA-828 goes on to show its sophistication with a super-quiet phono equalizer, soft touch program selectors, fully electronic volume control, and a Dimension Control display that doubles as a power level meter.

Specifications

Power Output (min. RMS per channel, 8 ohms, both channel driven):

100 W per chennel, from 20 Hz to 20 kHz

Continuous Power Output:

105 W per channel  at 8 ohms (1 kHz, 0,001% T.H.D.)

Dynamic Headroom:  1,3 dB (8 Ω)

Total Harmonic Distortion: 

Rated Power at 20 Hz to 20 kHz :  0,005% (8 Ω)

Half Power at 20 Hz to 20 kHz :   0,005% (8 Ω)

Half Power at 1 kHz :  0,01% (8 Ω)

Intermodulation Distortion SMPTE :  0,01% 98 Ω)

Frequency Response

Phono :  RIAA standard curve ±0,2 dB

Aux, Tape :  5 Hz - 100 kHz - 3 dB (20 Hz - 20 kHz, +0,2 dB, -0,2 dB)

Input Sensitivity

Phono MC :  17 µV 9170 µV, IHF'66)

Phono MM :  0,25 mV (2,5 mV, IHF ;66)

Aux, Tape :  15 mV (150 mV, IHF '66)

Signal-to-Noise Ratio (IHF A)

Phono MC :  75 dB (70 dB, 250 µV input Ihf '66)

Phono MM :  78 dB (87 dB IHF '66)

Aux, Tape :  80 dB (110 dB, IHF '66)

Maximum Input Voltage

Phono MC :  10 mV (11 mV, 1 kHz)

Phono MM :  145 mV 9160 mV, 1 kHz)

Input Impedance

Phono MC :  47  Ω

Phono MM :  47 k Ω

Aux, tape :  22 k Ω

Tone Control

Bass :  50 Hz +10 dB -10 dB

Treble :  20 kHz +10 dB -10 dB

Subsonic Filter:  30 Hz, -6 dB/oct

High Filter:  7 kHz -6 dB/oct

Loudness Control (vol. At - 30 dB):  50 Hz +9 dB

Muting:  -20 dB

Output Voltage

REC Out :  150 mV

Low Frequency damping Factor:  40 at 8 Ω; 20 at 4 Ω

Load Impedance

Main or Remote :  4 - 16 ohms

Main and Remote :  8 - 16 ohms

FM Tuner Section

Frequency Range:  87,9 - 107,9 MHz or 87,5 - 108,0 MHz

FM Sensitivity:  10,8 dBf (1,9 µV )

50 dB Quieting Sensitivity

Mono :  13,7 dBf (2,7 µV)

Stereo :  37,2 dBf (39,7 µV)

FM T.H.D.

At 100 Hz [mono/stereo]:  0,08% / 0,15%

At 1 kHz [mono/stereo]:  0,08% / 0,1%

At 6 kHz [mono/stereo]:  0,2 % / 0,2%

Signal-to-Noise

Mono :  77 dB

Stereo :  71 dB

Capture ratio:  1,2 dB

Alternate Channel Selectivity: 

Wide ±400 kHz :  75 dB

Narrow ±300 dB :  80 dB

Frequency Response:  20 Hz - 15 kHz, +0,2 -0,8 dB

Image rejection at 98,1 MHz :  80 dB

IF Rejection at 98,1 MHz :  90 dB

Spurious Response rejection at 98,1 MHz :  100 dB

Am Suppression:  60 dB

Stereo Separation

At 1 kHz :  45 dB

At 10 kHz :  40 dB

Carrier Leak

At 19 kHz :  -65 dB

At 38 kHz :  -70 dB

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

AM Tuner Section

Frequency Range:  530 - 1620 kHz or 522 - 1611 kHz

Sensitivity:  30 µV ; 250 µV/m

Selectivity:  56 dB

Image Rejection at 1000 kHz:  50 dB

IF rejection at 1000 kHz :  40 dB

General

Power Supply:  AC 120 V 60 Hz or 120 V/ 230 V 50/60 Hz

Power Consumption:  400 W, 500 VA

Dimensions (W x H x D):  530 x 181 x 388 mm (20-7/8" x 6-11/32" x 15-9/32")

Weight:  15 kg (33,1 lbs)