Pioneer SA-990 Vintage Stereo Receiver Dial Pointer Close-Up Macro Photos

                 Pioneer SA-990 Vintage Stereo Receiver Dial Pointer Close-Up Macro Photos

Technics SU 3500 Stereo Amplifier 1975

Technics SU 3500 Stereo Amplifier 
1975

The amplifier from Rainer Collection

This item is originally my first first stereo amplifier bought in 1975. I've got it back from my school friend now. As a collector I'm very happy because it is still as good in shape as I sold to my friend around 1980.
The amp provides 55 watts pc and that's enough for rocking the whole house and neighbors. A three-stage impedance matching for phono input is something special. Two phono inputs were already standard at Technics amplifiers.

https://www.flickr.com/photos/48136705@N05/30493717175/in/photostream/

Sony STR-414L AM/FM Program Receiver (1978-79)

                           Sony STR-414L AM/FM Program Receiver (1978-79)

Specifications

Tuning range: FM, MW, LW, SW

Power output: 40 watts per channel into 8Ω (stereo)

Frequency response: 10Hz to 50kHz

Total harmonic distortion: 0.3%

Damping factor: 30

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: 410 x 145 x 375mm

Weight: 9.1kg

http://www.hifiengine.com/manual_library/sony/str-414l.shtml

Hitachi TRK-9140 E Vintage Ghettoblaster Boombox 1981

Specifications:

Power Supply: AC:  220V,  50 Hz 30W 
DC: 15V ["C" cell (IEC R20) x 10 or JIS SUM-1] 
Car: Use 12V car battery adaptor
Power (mains) consumption: 25W
Speakers: 12cm, 2.8 ohms x 2
5 cm, 500 ohms x 4

Output: 2x10W RMS (AC operation)
5 W/CH (10% THD DC)

Dimensions: 317(H) x 542(W) x 204(D) mm
Weights: 11.6 kg (with batteries)

RADIO SECTIONS
Circuit System: FM/MW/LW 3-band superheterodyne
Tuning Range:   FM: 87.5 to 108 MHz
                           LW:  150-350kHz
                           MW:530-1605KHz

TAPE RECORDER SECTION
Tape: Cassette tape
Tape Speed: 4.75 cm/s
Recording System: AC bias ... TAPE [2]
Erasing System: AC erase ... TAPE [2]
Playback Frequency Range:    40 to 12,000 Hz (Normal tape)
                                                           40 to 14,000 Hz (Chrome tape)
                                                           40 to 16,000 Hz (Metal tape)

Input Sensitivity and Impedance: External microphone: 2 mV, 10 kohms
Line in: 400 mV, 50 kohms 
Output Level and Load Impedance: Headphones: 8 to 100 ohms
External speaker: 2.8 to 8 ohms