Audio Database

The

DIATONE DT-4000
36,000yen(around the 1971 time)

Description
 
It is the stereo cassette deck developed aiming at the high fidelity recording play.

The wow and flutter characteristic which was excellent with the belt drive and large-sized flywheel of the hysteresis synchronous motor of the outer rotor though it was a small cassette has been acquired.

In order to suppress the disclosure noise from a power source, the power source of a cut core system is carried.

Amplifier takes a direct connection system for every stage, and serves as a low distorted design to which a lot of FB were applied.

A manual operation button is a lever type and the recording button and the stop button are classified by color. Moreover, the prevention mechanism from incorrect recording is carried so that a music cassette may not be eliminated accidentally.

The slide volume which achieved right-and-left independence, a stop lever, VU meter, etc. are carried.

Headphone are designed as an independent circuit monitor regardless of a lineout.

Internal

Rating of a mode
Form Four two truck cassette deck
Tape form Compact cassette
Truck form Four two truck stereo
Magnetic tape velocity 4.8cm/s
Fast forward / rewinding time 70 or less (C-60) seconds
Frequency response 50Hz-10kHz±3dB
Wow and flutter Below 0.14%Wrms
Signal to noise ratio 45dB or more
Bias frequency 55kHz
Play damping time constant 120microsec
Input sensitivity/impedance Mic: 0.3mV/1kohm
Aux: 0.1mV/330kohm
Din:30mV
An Output voltage/impedance Output: 0.5V/2.2kohm
Din: 0.5V/2.2kohm
Headphone: 8ohms or more
The motor used Outer rotor hysteresis synchronous motor
The semiconductor used Transistor: 17 pieces
Power supply voltage AC90V-110V, 50Hz/60Hz
Dimensions Width 290x height 86x depth of 215mm
Weight 4.2kg