Yamaha B-1 / UC-1 NS Series Natural Sound Stereo Amplifier & Basic-Amp Controller

Rare Vintage Yamaha NS Series UC-1 / B-1 natural sound stereo basic-amp controller & amplifier in good cosmetic condition, with normal minor scuffs/scratches from use.  A knob on one of the speaker wire connectors is missing.  This unit is untested, I don't have the proper cable for testing.  It has not been used since it was serviced 21 years ago.  It is recommended by collectors that it be checked out electrically (transistors and solder joints, etc) before trying to use it after sitting for so long in order to prevent damage.  Being sold as-is due to age, no returns, no refunds, no exchanges, no exceptions.  Please refer to photos. 


The appearance of this item is probably around a 5 or 6 out of 10 (other than the missing knob on the speaker wire connectors) on the audiogon grading scale, but since it is untested and the functionality of it is unknown I have selected 2/10.

Specifications

Power output: 150 watts per channel into 8Ω (stereo)

Frequency response: 20Hz to 20kHz

Total harmonic distortion: 0.1%

Damping factor: 80

Input sensitivity: 0.775V

Signal to noise ratio: 100dB

Speaker load impedance: 4Ω to 16Ω

Semiconductors: 39 x FET, 113 x transistors, 3 x LED, 7 x zener diodes, 64 x diodes

Dimensions: 19 inches x 18 inches  x 7 inches

Year: 1975