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Technics SA-5770A monster reciever uit 1977 165 watt @ 8ohm!

1067 x gezien 14 x bewaard sinds 09 jul. '17, 19:40
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Zie omschrijving

Levering

Ophalen of Verzenden

Verzendkosten

€ 25,00
Bericht

Kenmerken

Conditie : Zo goed als nieuw
Luidsprekersysteem : Stereo
Vermogen : 120 watt of meer

Beschrijving

Monster van Technics
Black power....
Speelt perfect, is in mooie staat met minimale gebruikerssporen.
Echt ongelofelijk krachtige reciever, bekijk voor de grap de foto's van de trafo en koeling eindtrappen eens.....
De vaste prijs is 700€.
Hoeft niet weg, mag weg....
Is spelend te horen bij afhalen of verzenden op kosten en risico koper.

Technics SA-5770
1 9 7 7 1 9 7 8
Prefiguration of the not-so-well remembered SA-1000 mammoth and probably quite a "sleeper" as such.

Still a bit hectic inside... and with only two (big) smoothing caps instead of four, but the heatsinks are the same, so is the RF varicap and so are most of the (many) functions.


Power amp
DC full complementary OCL circuit
Each differential amp uses a single-package dual-transistor (A798 56F) with a 100% DC feedback circuit.
Emitters/followers follow the differential first stage.
Pre-driver stages are constant-current loaded Class A amplifiers.
Parallel push-pull output.
Multiple protection circuits with overload alarm

Preamp
Low-noise, overload-resistant phono EQ section.
First stage is a differential amp with current mirror load.
Second stage is low-distortion Class A amp which drives the SEPP output circuit with low impedance.
Detented volume control with 26 2dB steps
Low distortion tone controls with three-stage DC circuit and tabilized differential amplifiers (1st stage) and SEPP output (final stage)

Tuner
4-gang dual-gate MOS-FET Mixer with point-to-point wiring in the FET buffer-equipped local oscillator
Flat group-delay ceramic filters with 6 stages of differential amplification by way of constant-current supply and three ICs and discrete stages
Independent IF control circuit, high-linearity detector with select detector diodes
FM MPX PLL IC with double-differential switching
300% overmodulation tolerance
Stabilized and regulated tuner power supply
Quality AM section with IC and double-tuned LC filter in the IF circuit
Phase delay switch
Technics SA-5770, image 1 Technics SA-5770, image 2 Technics SA-5770, image 3
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Preamp
Low-noise, overload-resistant phono EQ section.
First stage is a differential amp with current mirror load.
Second stage is low-distortion Class A amp which drives the SEPP output circuit with low impedance.
Detented volume control with 26 2dB steps
Low distortion tone controls with three-stage DC circuit and tabilized differential amplifiers (1st stage) and SEPP output (final stage)

Tuner
4-gang dual-gate MOS-FET Mixer with point-to-point wiring in the FET buffer-equipped local oscillator
Flat group-delay ceramic filters with 6 stages of differential amplification by way of constant-current supply and three ICs and discrete stages
Independent IF control circuit, high-linearity detector with select detector diodes
FM MPX PLL IC with double-differential switching
300% overmodulation tolerance
Stabilized and regulated tuner power supply
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