STATUS - SOLD
Click here for more pictures
Description :
The Pioneer C-21 pre-amplifier was mainly assembled by hand using the finest grade circuit parts. These included Nichrome-vaporized, metal-coated resistors, metallized polypropylene capacitors, metallized polyester film capacitors, super-low noise electrolytic capacitors, and a large power supply transformer having an oriented core with separate secondary windings for the left and right channels with additional shielding to further reduce crosstalk. Even the contact points inside each gain pot were silver palladium treated and resistors were palladium and silver alloy. The total number of semiconductors included 36 transistors and 47 diodes. The quality of the electronic parts that went into the C-21 made for a wonderfully transparent and accurate preamplifier. The C-21 Preamplifier is designed to work in conjunction with the M-22 or the M-25 amplifier in the Series 20 line.
Specifications :
Equalizer and Flat amplifier....................2 stage differential amplifier Class A SEPP with current mirror circuit
Input (Sensitivity/Impedance)
Phono...................................................2.5mV/100 ohm, 10kohm, 25kohm, 50kohm, 75kohm, 100kohm
Cartridge load.......................................100pF, 150pF, 200pF, 300pF, 400pF, 500pF
Aux 1...................................................150mV/50kohm
Aux 2...................................................150mV/50kohm
Tape play..............................................150mV/50kohm
Phono overload level
THD, 0.01%..........................................300mV (1khz)
Output (Rl:50kohm)...............................1V/450ohm (rated), 20V/150ohm(max)
Total Harmonic Distortion (20hz to 20000Hz)
Phono..................................................0.006% (1V output, volume: -20dB. Gain control: 0dB)
Frequency response
Phono..................................................20Hz to 20kHz, +/-0.2dB
Aux.....................................................10Hz to 100kHz, +0, -0.2dB
.......................................................3Hz to 300kHz, +0dB, -1.0dB
Hum and noise (IHF, short-circuited, A network)
Phono (1V output).................................80dB
Aux (1V output)....................................100dB
Phono Subsonic Filter...........................15Hz (6dB/oct)
Power comsumption.............................14 Watts (UL)
Dimensions(w x d x h)..........................420 x 357 x 81 mm
Weight................................................6.3 kg
Miscellaneous :
Matching..............................................Pioneer M-22 Power Amplifier
Made in...............................................Japan
Condition.............................................8 / 10 (Decent Condition)
Product information :
http://www.silverpioneer.netfirms.com/c21_preamp.htm
http://www.scribd.com/doc/8792041/C21-Operating-Instruction-Manual |
