Yamaha T-550

Maintenance repair

Japan 1979

FM tuner
Frequency 87.6 - 108 MHz
Sensitivity 50 dB mono 3 µV (14.8 dBf)
Sensitivity 50 dB stereo 40 µV (38 dBf)
Mono usable sensitivity 1.7 µV (9.8 dBf)
Usable stereo sensitivity 40 µV (38 dBf)
Spurious rejection 80 dB
Image rejection 60 dB
IF rejection 90 dB
60 dB AM suppression
Capture Ratio 1.5 dB
Selectivity 65 dB
Mono signal to noise ratio 84 dB to 65 dBf
Stereo signal to noise ratio 80 dB to 65 dBf
Mono harmonic distortion 0.05%
Stereo harmonic distortion 0.07%
Mono intermodulation distortion 0.05%
Stereo intermodulation distortion 0.1%
Frequency response 30 Hz - 15 kHz +0.5 -1 dB
Frequency response 50Hz - 10kHz ± 0.3dB
Muting 5µV

AM tuner
Frequency 525 -1605 kHz
Usable sensitivity 15 µV
Selectivity 27 dB
52 dB signal to noise ratio
Image rejection 40 dB
Spurious rejection 50 dB
Harmonic distortion 0.3%

FM output level 500mV 1.6kHoms
AM output level 170 mV 1.6 kHoms
Output level rec cal 250 mV 1.6 kHoms