59,000yen(Released in 1968)
The first receiver released by Diatone at the same time as the Integrated Amplifier DA-55U.
The amplifier part has adopted the complementary SEPP-OTL system by an all-silicon transistor.
The diffusion type silicon transistor which has a large secondary breakdown withstand power is adopted as a power transistor, and it is considered to withstand a small amount of output terminal short circuit even if a speaker terminal is accidentally short-circuited. In addition, as a double safety measure, an electronic switch using a silicon thyristor is installed.
If the output end is short-circuited, an overload will be displayed and you can identify it at a glance.
The silicon planner transistor is adopted as an FM tuner part, and the high sensitivity is aimed at.
The pure electronic type automatic switching circuit is adopted as an FM multi-circuit, and mono-stereo switching is performed automatically at the time of stereo reception. The stereo indicator lights up during stereo reception.
The balance type switching system is adopted as this circuit, and the leakage of a subcarrier is small in combination with a CR composite element (38kHz filter), and the reception of a high degree of separation and a low distortion is possible.
The AM tuner part is equipped with a ferrite bar antenna.
The 7-step switching type tone control of a 3dB step is adopted as a tone control.
This method has no deviation between channels and enables accurate sound quality adjustment.
The exterior uses a wooden cabinet made of Eurasian teak, which has the same design as the consumer Diatone speakers announced at the same time.
|Model td>||Stereo tri-amplifier with FM (MPX) td> tr>|
|& lt; Amplifier & gt; td> tr>|
|Maximum output td>||49.5W + 49.5W (4Ω) / 20% or less td> tr>|
|Continuous output td>|| 32W + 32W (4Ω) |
30W + 30W (4Ω, listed in another catalog) td> tr>
|Music Power td>||43W + 43W (4Ω) td> tr>|
|Distortion rate td>|| 0.5% or less (music power) |
1% or less (during continuous output)
20% or less (at maximum output) td> tr>
|Frequency characteristics td>||20Hz-20kHz -2dB (Tape) td> tr>|
|Input td>|| Phono: 4.7mV / 47kΩ |
Tape: 185mV / 125kΩ td> tr>
|Tone control td>|| Low range: + 9dB -13dB (100Hz, 3dB step) |
High range: + 10dB -12dB (10kHz, 3dB step) td> tr>
|S / N td>||Tape: 65dB or more td> tr>|
|Damping factor td>|| 30-60 |
30 (8Ω, listed in another catalog) td> tr>
|< FM tuner > td> tr>|
|Receive frequency td>||76MHz-90MHz td> tr>|
|antenna td>||300Ω balanced type td> tr>|
|Sensitivity td>||3 μV / 83 MHz (30% modulation, S / N ratio 30 dB) td> tr>|
|S / N ratio td>||50dB (input 60dBμV, 83MHz, 30% modulation) td> tr>|
|Frequency characteristics td>||20Hz-15kHz ± 2dB (stereo) td> tr>|
|Distortion rate td>||1% or less (400Hz, 30% modulation, 83MHz) td> tr>|
|Stereo separation td>||40dB or more td> tr>|
|<AM Tuner > td> tr>|
|Receive frequency td>||535kHz ～ 1605kHz td> tr>|
|antenna td>||Bar antenna (with external terminal) td> tr>|
|Sensitivity td>||50μV / m (1000kHz) td> tr>|
|S / N ratio td>||40dB (input 74dBμV / m, 1000kHz, 30% modulation) td> tr>|
|Frequency characteristics td>||100Hz-4.5kHz -2dB td> tr>|
|Distortion rate td>||2% or less (400Hz, 30% modulation, 1000kHz) td> tr>|
|< Comprehensive > td> tr>|
|Transistor used td>|| Transistors: 33 |
Thyristor: 1 td> tr>
|power supply td>||AC100V td> tr>|
|Power consumption td>||104VA td> tr>|
|External dimensions td>||Width 460 x Height 170 x Depth 310 mm td> tr>|
|Weight td>|| 9.0kg |
9.5kg (listed in another catalog) td> tr>