VICTOR/JVC CD4-30

Commentary

Demodulator for 4-ch playback of CD-4 records.

It uses a 4-ch automatic system and automatically switches to CD-4 4-ch playback if the record is a CD-4 record, and to normal stereo playback if it is a 2-ch record.
In addition, since 2-ch records containing signals of 20 kHz or higher are also available, it is possible to switch to 2-ch playback with a manual switch.

It has a 2 ch direct output terminal and can pass through the equalizer circuit by setting the switch of the demodulator to the direct side.

Performance and stability have been enhanced by the use of highly reliable PLL IC, which is also used for NASA space communications, and many ICs, FETs, and semiconductor elements.

Model Rating

Type	CD-4 disk demodulator
Input impedance	100k Ω / 50 pF
Input level	1.0 mv ~ 5.0 mv (1 khz) 1.0 mv ~ 7.0 mv (30 kHz)
Output impedance	5k Ω
Output level	300mV
Equalizer	Monolithic IC Use (2 Split Type)
Distortion factor	0.08% (2 mv, 1 khz)
Residual noise	2.0 μ V
Frequency characteristic	20 Hz to 16 kHz
Separation (1 kHz)	When standard signal is applied Left-Right:45dB Front-Rear:30dB Record playback time Left-Right:25dB Front-Rear:23dB
Semiconductor used	Transistor : 27 IC : 6 FET : 6 Diode : 23 Pieces
External dimensions	Width 176x Height 86x Depth 335 mm
Weight	2.7kg