Audio Database

The

Pioneer C-73
50,000yen(around the 1980 time)

Description
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The preamplifier carrying a cartridge loading circuit changing switch.

The equalizer part has adopted first rank differential and three-step hardwired-connection final-stage Class-A operation pure complimentary SEPP and positive/negative 2 power source as a circuit system, and is raising a distorted reduction and temperature characteristic.
Moreover, the NFB element selected carefully is adopted.

In order to demonstrate the performance of a cartridge more, the cartridge loading change-over switch is carried.
Load resistance and four kinds of load capacity can be chosen, respectively, and a loading suitable for the cartridge to be used can be set up.

Attached organizations, such as a 4-unit volume which adopted 32 step attenuator type, and a two-line tapes circuitry which can perform a mutual tapes reproduction, are adopted.

It is the panel design which can be mounted on EIA specification rack.


Rating of a mode
Form Stereo preamplifier
Circuit system
Equalizer-amplifier part : 3 steps of first rank differentials hardwired-connection Class-A SEPP
Control amplifier part : 3 steps of first rank differentials hardwired-connection flat amplifier
3 steps of turnover switching NFB type tone
Input terminal Phono1, 2 (with a 4 steps of cartridge load capacity switching)
Tuner, AUX1, 2, Tape Play1, 2
Phono maximum permissible input (1kHz) 300mV (0.01% of distortion)
Output-terminal Tape Rec1, 2, Output
THD (20Hz - 20kHz) Phono:0.01%
Tuner, AUX, Tape Play: 0.005% (at the time of 2V output)
Frequency characteristic Phono: 20Hz-20kHz}0.2dB
Tuner, AUX, and Tape Play:10Hz-100kHz+0 -0.5 dB
SN ratio (IHF, A network)
Short circuit
Phono:80dB
Tuner, AUX, Tape Play: 100dB
Power consumption
(Electrical Appliance and Material Control Law)
10W
Dimensions Width 480x height 142x depth of 390mm
Weight 7.7kg
EIU specification rack mounting unit 3U