Audio Database

The

Technics SA-5200 47,800yen(around the 1973 time)

Description
 
FM / AM-stereo receiver which contained the matrix 4ch circuitry which can connect a mic with 2 sets of tape decks.

The whole page hardwired-connection OCL circuitry which used the differential-amplification circuitry for the first rank is used for a main-amplifier part.

The equalizer stage has adopted the two-step hardwired-connection stream composition with a low noise PNP transistor, and the bias current is also stabilized by applying the direct current NF.

the tone control serves as circuitry using NF circuitry of the main-amplifier part -- a main-amplifier part -- the attenuate of the amount of feedbacks of NF loop of the first rank was carried out with the frequency, and it is controlled.
By this scheme, in order to carry out signal operation after an amplification, distortion generated in a tone control circuit serves as a relative minimum.

FM triple variable condenser and the 4 pole MOS FET are adopted as the front end of FM tuner part, and high-sensitivity-ization is attained by obtaining the stable high gain. Moreover, IF amplification stage has six-step composition which used three steps of differentials, and selectivity of 60dB has been obtained by adopting two ceramics filters [ three ] as a selection element.
The coil unit of a monolithic IC and a sealing structure is adopted as a MPX circuitry, and the influence of a temperature or humidity is eliminated.

The antenna termination carries the termination for coaxial cables. Moreover, impedance conversion also serves as a hi-reliability design which adopted the balun.

2 sets of tapes monitor circuitries are carried, and a sound recording and dubbing with two simultaneous sets are possible.

The matrix circuit which changes 2ch signals into 4ch signals is built in.

Rear

Rating of a mode
Form FM / AM-stereo receiver
<Amplifier part>
Music power (IHF) 46W (4ohms)
37W (8ohms)
Effective output (IHF) 16W/16W (4ohms)
14W/14W (8ohms)
Power Band Width 7Hz-30kHz+1 -3 dB
Frequency characteristic 10Hz-50kHz+1 -3 dB
THD 0.8%
Cross modulation distortion 1.0% (at the time of 60Hz:7kHz=4:1 and an effective output)
SN ratio (IHF) Phono:70dB
Playback:90dB
Dumping factor 30 (at the time of an 8-ohm load intensity) or more
Input sensitivity/impedance Phono: 3mV / 47kohm
Mic: 3mV / 47kohm
Tape Playback: 200mV / 30kohm
Output voltage Rec out:200mV
Tone control Bass: +10dB--12dB (50Hz)
Treble: ±10dB (10kHz)
Loudness control + 12dB (50Hz), +5dB (10kHz)
<FM tuner part>
Received frequency 76MHz - 90MHz
Sensitivity (IHF) 1.9 microvolts
Selectivity (IHF) 60dB
SN ratio (IHF) 65dB
Capture ratio 2.0dB
Image stonewalling ratio 40dB
IF stonewalling ratio 85dB
AM supression ratio 45dB
Stereo separation 35dB
THD 0.4%
<AM tuner part>
Received frequency 520kHz - 1,610kHz
Sensitivity (IHF) 20 microvolts
Selectivity 20dB
Image stonewalling ratio 50dB(1,000kHz)
<Synthesis>
The semiconductor used IC: One piece
FET: One piece
Transistor: 38 pieces
Diode: 19 pieces
Power source AC100V, 50/60Hz
Power consumption 52W
Dimensions Width 410x height 135x depth of 358mm
Weight 8kg