Yamaha C-2

Description

Yamaha's legendary preamplifier using Yamaha's original ultra-low noise transistors. The ultra-low-noise field effect transistor used for differential amplification of the first stage was developed for the C-2, has very little noise and uniform electrical characteristics. The circuit configuration is a Cascode bootstrap current mirror differential input and a clean parallel push-pull output stage in Class A. The equalizer amplifier circuit has a dual screen. The tone block amplifier circuit configuration is almost the same as the corrector amplifier, NF-type tone controls, Bass and Treble use a high-precision attenuator with 20 steps and 21 positions. In addition, at position 0 it is completely separate from the circuit, and the current amplifier becomes an amplifier with a flat buffer. Attention voltage 100V!
Phono1/2:2mV/47kOhm
Phono3(MC):50mV/10
kOhm
Tuner
?
Aux:120mV/47
kOhm
Tape PB A/B:120mV/47
kOhm
Phono1/2/3(RIA):30Hz
-
15kHz ±0.2dB
Tuner
,
Aux:5Hz
100kHz +0 -1.5dB
Tape A/B:5Hz
-
100kHz +0 -1.5dB
Phono1 / 2:
85dB (2mV rated input, input short-circuit)
99 dB (10 mV input, input short-circuit)
Phono3:
70 dB (at 50mV rated input, input 50Ohm shorted)
Tuner, Aux:
100 dB (input short-circuit)
Skew rate
:
Phono1 / 2:
0.003% or less (VRmax, 7.75V output)
0.003% or less (VR-30dB, 775mV output)
Phono3 (MC):
0.02% or less (VRmax, 7.75V output)
0.05% or less (VR-30dB, 775mV output)
Tuner, Aux, Tape A / B:
0.003% or less (VRmax, 7.75V output)
0.003% or less (VR-30dB, 775mV output)
Cutoff frequency
Bass: 350Hz
Treble: 3.5kHz
Change amount (Bass: 20Hz, Treble: 20kHz)
0, ± 1.5, ± 1.5, ± 2.0, ± 3.0, ± 4.0, ± 5.0, ± 6.0, ± 8.0, ± 10dB
AC100V
?
50Hz/60Hz
25W
Width 435x height 72x depth of 320mm
7.8kg