Classic (1980 and Earlier) Technics Gear

Technics Model SA-505 Receiver

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Front View
Image Attribution: Technics Brochure
Date: November 8th, 2001

Technics Brochure Highlights

Pure-complementary OCL amplifier. Bridged rectifier is used for DC rectification. Current-mirror-loaded differential stage. Two 8,200 uF electrolytic capacitors are used in the power supply. Outstanding S/N ratio of 73 dB (IHF '78 re 5 mv). MOS FET FM tuner. Flat group delay ceramic filters. High linearity quadrature detector stage. Phase-locked-loop multiplex stage. LED active sensor for FM center-of-channel tuning. 2-colored, 5-point LED signal strength indicator. "Acoustic control" with low and high frequency boost and filter switches. Two tape monitors with two-way tape dubbing. FM muting/mode selector. Main/remote speaker selector. Loudness control. Simulated wood cabinet.

Contributed by Ben
On 2001/11/08

General

Description Receiver

Rarity Rare

Designed in Japan

Manufactured In Japan

Wood Case Yes

Silver Face Yes

Channels Two

Speaker Connections Two Sets

Power Consumption 340 watts maximum

Physical

Width 480 mm

Height 160 mm

Depth 293 mm

Weight 20.9 lbs

Amplifier

RMS Power Per Channel 63 watts

Damping Factor @ Load Impedance 34 @ 8 ohms

Total Harmonic Distortion (THD) 0.04% @ full power, 0.02% at 1/2 power

Power Bandwidth 20 to 20 kHz

Frequency Response 7 Hz - 50 kHz +/- 1 dB

Intermodulation Distortion (IM) 0.04%

Meter Range 1x, 0.1x, Off

Overload Lamp(s) Yes, also safe operation lamp

Output Meter(s) LED Power Meters

FM Tuner

RF Sensitivity 1.9 uV

300 Ohm Binding Posts Yes

75 Ohm Binding Posts Yes

50 dB quieting sensitivity, Stereo 39.7 uV

50 dB quieting sensitivity, Mono 2.7 uV

THD, Mono 0.15%

THD, Stereo 0.30%

Frequency Response 20 Hz to 15 kHz, +1/-2 dB

Capture Ratio 1.2 dB

IF Image Rejection 60 dB

IF Rejection 75 dB

Alternate Channel Selectivity (wide or normal) 70 dB

Spurious Rejection 82 dB

AM Carrier Rejection 55 dB

Stereo Separation at 1 kHz 45 dB

Carrier Suppression -40 dB @ 19 kHz, -50 dB @ 38 kHz

Mono Switch Integral to FM muting off

Signal Strength Meter Yes (LED)

Center Tuning Meter Indication via LED arrows

Stereo Lamp Yes

Muting Switch Integral to FM stereo on

AM Tuner

RF Sensitivity 30 uV (300 uV/meter for ferrite)

Adjacent Channel Selectivity 30 dB

IF Rejection 40 dB

Image Rejection 50 dB

Preamplifier

Single Bass Adjustment Yes

Single Treble Adjustment Yes

High Filter 7 kHz, 6 dB/octave, also Boost 100 Hz 6dB

Low Filter 100 Hz, 6 dB/octave, also Boost 10 kHz 6 dB

Gain Control Yes

Loudness Contour Yes (+9 db @ 50 hZ when gain is at -30 dB)

Balance Yes

Number of Tape Monitors Two

Tape to Tape Dubbing 1,2 and 2,1

Auxillary Input Source Yes

Phono Input Source Yes

Illuminated Source Indicators Aux, Phono, AM, FM

Tuner Source Input Integral AM and FM

Headphone Jack(s) Yes

Speaker Selection Nomenclature Main, Remote

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