FM/AM Stereo Receiver (1980)
Tuning range: FM, MW
Power output: 50 watts per channel into 8Ω (stereo)
Frequency response: 7Hz to 45kHz
Total harmonic distortion: 0.04%
Damping factor: 34
Input sensitivity: 2.5mV (MM), 150mV (line)
Signal to noise ratio: 80dB (MM), 95dB (line)
Output: 150mV (line)
Speaker load impedance: 4Ω to 16Ω
Dimensions: 480 x 160 x 293mm
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Reviewed Nov 18th, 2016 by Jim Libert
I own one of these. Came with one channel out. Replaced the STK1050 power pack. was a bit challenging since the screw was 1 away from the heat sinked bridge rectifier. I will also replace a smoked (open) 470 ohm resistor (R908). It probaly was burned when the power pack died or the previous owner shorted the outputs. I replaced the power pack and it sounds great. One of the feet were broken I will have to fix. Thus far I restored the tuner section will have to work on power supply next replacing all electrolytic capacitors. I love the schematic for this. It actually labels all parts on the board and schematic numerically and is very easy to find and replace bad parts. I am not sure why Technics uses hardboard (cardboard) on the bottom of all their receivers. They are the only manufacturer that I know of that uses this exclusively. Not a huge issue but a bit cheap I guess? Also Technics uses a piece of black paper to shield the lighting board from shorts and also helps direct the light. A bit cheap also. they use no less that 12 bulbs (most are burned out) on that board. I will replace with a modified version of LED fuse lamps probably 4 of them so they never burn out. I like the styling better than the SA-5370 series also. They used switches o the SA-404 vs push button on SA-5370. All in all a nice unit for a Technics (I am Pioneer fan).
Reviewed Jul 23rd, 2016 by cparadis
I bought this new 1980, and have used it almost non stop since, I am an electronic engineer and have repaired and built amps both tube and semiconductor. I do appreciate the sound from tubes but must agree that semi can come very close.
I have had very few issues with Technics receiver, noisy switches were fixed with some contact cleaner. I tested the audio section for distortion, hum, and several other parameters and found it to be very accurate and very clean.
I have this connected to my turntable and it sounds great.I don't use the radio since I have SAT radio.