Audio Database

The

DIATONE DA-R320 45,000yen(1973 release)
48,000yen(around the 1975 time)

Description
@
He is a FM/AM receiver which hits the sister machine of DA-R340.

A power amplifier part is expanding a power ratio to 2.6, and has heightened the drive capability of the low impedance speaker.
Moreover, CR type tone control and a loudness mechanism are carried.

Monolithic IC and a peak separation 1MHz discrete transformer excellent in the phase linear ceramics filter or the limiting circuit effect are adopted as a FM-IF stage.

IC and Q of a double balance differential recovery system have adopted as a FM-MPX stage the mould transformer which was highly excellent in temperature-proof / humidity characteristic.

FM muting circuit is carried. In this circuit, since it is not concerned with ON/OFF of muting operation but the bias conditions of the transistor of a muting circuit are fixed with the substitution method, the pop noise has decreased.

Triple Cheung IFT is employed as an AM-IF stage, and AM receiver style is strengthened.

The microphone mixing circuit is carried.

The FM DET out terminal is carried for connection of the decoder for FM 4ch.

The selector position indicator is carried.


Rating of a mode
Form AM/FM receiver
<Audio part>
Output
Both ch(es) operation : 14W+14W (4ohms)
11W+11W (8ohms)
One-side-channel operation : 18W/18W (4ohms)
13W/13W (8ohms)
Music 44W (4ohms)
30W (8ohms)
EIAJ: 30W (4ohms)
Power bandwidth 20Hz - 50kHz
THD 0.8% (at the time of an Output power)
0.06% (at the time of 1W output)
Frequency response Phono:RIAA STD
Aux: 20Hz-30kHz}1dB
Input sensitivity/impedance Phono: 2.5mV/50kohm
Aux: 150mV/60kohm
Playback: 150mV/50kohm (pin), 300mV/50kohm (din)
Mic: 1mV/40kohm
Recording output Rec1, 2:150mV (pin), 30mV (din)
Tone control Bass: }10dB (100Hz)
Treble: }10dB (10kHz)
Remains noise 0.5mV
Input conversion noise Phono:-118dB(V)
Aux:-100dB(V)
Mic:-124dB(V)
<FM tuner part>
Antenna A 300-ohm balance, 75-ohm disequilibrium
Practical speed 1.8 microvolts (IHF)
The degree of effective selection 60dB(IHF)
Capture ratio 1.5dB(IHF)
Image disturbance ratio 60dB(IHF)
IF disturbance ratio 70dB
1 / 2 IF disturbance ratio 60dB
AM oppression ratio 50dB
S/N 70dB
THD (100% abnormal conditions) mono:0.2%
stereo:0.5%
Separation 40dB(1kHz)
30dB(10kHz)
Muting ON-OFF is possible.
<AM tuner part>
Antenna With a ferrite bar antenna
Practical speed 55dB (bar antenna S/N 30dB)
The degree of selection 35dB (}10kHz)
Image disturbance ratio 40dB
S/N 50dB
<Synthesis>
Power consumption 53W
Dimensions Width 450x height 146x depth of 330mm
Weight 9.9kg