Audio Database

The

DIATONE DT-4500
42,800yen(around the 1978 time)

Description
 
It is the cassette deck which omitted the Dolbey circuit from DT-4550.

The DC servo motor which built in the tachogenerator is adopted as a drive motor. This always controlled the number of rotations of the motor at fixed speed, and the stable tape run is realized.

The full auto stop mechanism which protects a tape is carried. If a tape finishes also in the case of "recording / play / fast forward / rewinding" throat, a pinch roller and a head block will be canceled automatically and a manual operation button will return. Since a burden unnecessary for a mechanism is not placed by this, the effect is raised also to improvement in durability.

In order to employ the characteristic of the tape to be used efficiently, the tape selector which made the equalizer become independent of bias is carried.
The kind of tape supports the normal tape, the chromium tape, and SA tape.

The mechanical pause mechanism is carried.

The soft ejection mechanism of an oil dumping system is carried.

By connecting an optional audio timer, absence recording and an alarm clock play are possible.

The lighting lamp is carried in a cassette case.


Rating of a mode
Form Cassette deck
Truck form Four trucks [ two ]
Motor an octopus -- a DC servo motor with a built-in charging dynamo
Head For Recording plays: Hard permalloy head
For elimination: Ferrite head
Magnetic tape velocity 4.8cm/s
Fast forward / rewinding time It is C-60 tape and is about 90 seconds.
Wow and flutter 0.07%(WRMS)
Frequency response 30Hz - 13kHz (normal tape)
30Hz - 16kHz (chromium tape)
Signal to noise ratio 56dB or more
Equalizer curve damping time constant 3,180 microseconds/120microsecond (normal tape)
3,180 microseconds/70microsecond (chromium tape)
Input sensitivity/impedance Mic: -71dBV/1.2kohm
Line: -27dBV/220kohm
An Output voltage/impedance Line: -10dB /, 22kohm
Headphone: -25dBV/8ohm
Power source AC100V, 50Hz/60Hz
Power consumption 8W
Dimensions Width 480x height 154x depth of 323mm
Weight 5.3kg