Description
Technics SU 50A Stereo Integrated Solid State Amplifier Vintage 1969 Good Look The description of this item has been automatically translated. If you have any questions, please feel free to contact us. TECHNICS SU 50A Stereo Integrated Solid State Amplifier Vintage 1969 GOOD LOOK The TECHNICS SU-50A amplifier is a vintage item manufactured in the late 1960s. It is one of the first solid-state amplifiers, with a sound quality comparable to a tube amplifier. It is very rare and hard to find in perfect aesthetic and functional condition—a true work of art from TECHNICS golden era. TECHNICS EAA-2010/SU-2010/SU-50A/ TECHNICS 50A ¥95,000 (released in June 1969) ¥95,000 (around 1970) Working perfect, All Refurbished Work On 100/120/220/240 volts AC VERY RARE Vintage Amplifier with New GREEN LED lights Like MCINTOSH! This solid state pre-main amplifier was created by integrating the development technologies of the TECHNICS 10A, 20A, 30A, and 40A tube type amplifiers. The model number has been changed 3 times: EAA-2010, SU-2010 and SU-50A. The main amplifier section uses a two stage differential amplifier circuit and an OCL circuit with a two power supply system. All stages are directly connected. The circuit configuration without an output capacitor improves low-frequency characteristics and improves stability and linearity. The equalizer stage of the preamplifier amp section is composed of 3-stage direct connection NF type using low-noise PNP transistor, which solves the shortage of dynamic range and obtains high S/N. The tone control circuit is based on TECHNICS s original method using special double volume. This system has a special structure that combines a silver conductor and a resistor. At the midpoint, both brushes touch the silver conductor, so that all capacitors are removed from the circuit to become a resistance-only circuit, resulting in a flat characteristic. A protection circuit using four transistors and two diodes is mounted. This circuit is equipped with an automatic control and protection device that detects the operating point of the power transistor to maintain safe operation, an automatic correction circuit for temperature changes, and an instantaneous recovery type so that even if an excessive current flows, the signal only clips and operation is not interrupted. The front panel features push-button input selection buttons and a large volume knob to improve usability. In addition, it uses a design in which the letters on the front panel come out when the switch is turned on. The pre-out terminal is equipped with two systems, a Low terminal with a rated output of 1 v and a High terminal with a rated output of 5 v. It is equipped with 4 AC outlets. Equipped with two types of speaker connection terminals. Model Rating TypeSolid state pre-main amplifier Circuit systemFull-stage direct-coupled differential amplifier SEPPP OTL-OCL Circuit Power Amplifier Unit Music Power (IHF)120W (4 ?) 80W (8 ?) 50W (16 ?) Rated Output (IHF)40W/40W (4 ?) 30W/30W (8 ?) 20W/20W (16 ?) Frequency response (at rated output)5 Hz to 150 kHz Signal-to-noise ratio95 dB or more (IHF, A-network, input short) Input Sensitivity / Impedance1V/50k ? Damping factor 150 (8 ?) Adaptive load impedance4 ? ~ 16 ? Transistor protection circuitASO detection method instantaneous return type Preamplifier Section Input Sensitivity / Impedance (1 kHz, Volume max)Phono1, 2 : 1mV/47k ? Tuner: 100mV/70k ? Aux1, 2 : 100mV/70k ? Maximum allowable input (1 kHz, 0.1% distortion rate)Phono1, 2 : 140 mV Tuner:10V Aux1, 2 : 10v Output Voltage / Impedance Rated output: 1V/3k ? (Low) 5V/200 ? (High) Maximum output (1 kHz, 0.1% distortion rate) :1.8V(Low) 9V(High) Tape monitorRec out : 100mV/200 ? Playback: 100mV/70k ? Rec/Play( din ):30mV/60k ? (IN) 100mV/70k ? (OUT) Signal-to-noise ratio (IHF, A-network Input short)Phono1, 2 : 70 dB or more Tuner: 90 dB or higher Aux1, 2: 90 dB or more Total harmonic distortion factorNot more than 0.1% Frequency characteristic High, VRmax, TCflat :Phono1 and 2 : within ± 0.5 dB deviation from RIAA standard curve Tuner: 5 hz to 200 kHz, + 0 to 3 db Aux1, 2: 5 Hz to 200 kHz, + 0 -3dB Low, VRmax, TCflat :Phono1 and 2 : within ± 0.5 dB deviation from RIAA standard curve Tuner: 5 hz to 150 kHz, + 0 to 3 db AUX1, 2: 5 Hz to 150 kHz, + 0 -3dB Tone controlBass: +15dB ~ -15dB Turnover frequency: 250 Hz, 500 Hz Treble: +15 dB to -15dB Turnover frequency: 2.5 kHz, 5 kHz FilterLow : 30 Hz, -12dB/oct. High frequency: 8 kHz, -12dB/oct. Muting-20dB Semiconductor used Transistors (43 pcs) :2SA564A : 20 2SA564 : 2 2SC828 : 4 2SB171 : 4 2SC696A : 4 2SA547A : 2 2SC697A : 2 2SD189 : 4 2SB473 : 1 Diodes (17 pcs) :MA242 : 2 MA242R : 2 SD-1Y : 1 SV-02 : 2 SM-150-005 : 8 OA-70 : 2 Pwer100 VAC / 117V / 220V / 240V, 50/60Hz AC outletSwitched : Route 3 Unswitched : 1 line Power consumption Rated output: 175 VA No signal: 37VA External dimensionsWidth 420x Height 147x Depth 325 mm Weight13.5kg SPANISH: The TECHNICS SU-50A amplifier, released in the 1960s, is a landmark piece in the evolution of solid-state amplifiers. Although specifications may vary slightly depending on the source, typical technical features of this model include: •Type: Solid State Integrated Amplifier •Output Power: Approximately 25 watts per channel at 8 ohms •Frequency response: 20 Hz to 20 kHz •Total Harmonic Distortion (THD): Less than 0.5% at full power •Inputs: Various, including phono, tape, and auxiliary, allowing you to connect different audio sources •Input impedance: Specific setting for sources such as turntables and tapes •Tone controls: Adjustable bass and treble •Circuit design: Transistor design that allows a sound similar to tube amplifiers •Dimensions and weight: Varies, but generally compact for its time This amplifier is appreciated for its warm sound and retro aesthetics, characteristics that make it a desired device for collectors of vintage hi-fi equipment.The TECHNICS SU-50A amplifier is a vintage item manufactured in the late 1960s. It is one of the first solid-state amplifiers, with a sound quality comparable to a tube amplifier. It is very rare and hard to find in perfect aesthetic and functional condition—a true work of art from TECHNICS golden era. The main amplifier section uses a two stage differential amplifier circuit and an OCL circuit with a two power supply system. All stages are directly connected. The circuit configuration without an output capacitor improves low-frequency characteristics and improves stability and linearity. This circuit is equipped with an automatic control and protection device that detects the operating point of the power transistor to maintain safe operation, an automatic correction circuit for temperat Garantía del fabricante Sin garantía Salidas de audio Conectores de altavoz de banana Salidas de audio Estéreo L/R RCA Potencia RMS 2 X 30 Watts RMS Año de fabricación 1969-1970 Color Negro Número de salidas 4 Entrada de audio Estéreo RCA Entradas de audio AUX Entradas de audio Estéreo L/R RCA Entradas de audio Fono/Giradiscos Entradas de audio Pre Out Número de entradas 6 Cantidad de unidades 1 Formatos compatibles SU-2010 Producto compatible 50A Producto compatible EAA-2010 Producto compatible SU-2010 Producto compatible SU-50A Tipo Amplificador integrado Modelo SU-50A Marca Technics Tipo de unidad Unidad Potencia 30+30 Watts RMS Clase de amplificador A Características Término análogo Número de canales 2 País/Región de fabricación Japón EAN No aplicable
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