|
| DENON TU-450 |
|
| 29,800yen(around the 1987 time) |
The AM/FM stereo tuner in which the 16-game preset function was
carried.
While thinking the basic engine performance as important, it is
designed on the theme of a quality and the ease of using.
Tuning
operation is easy and the digital synthesizer system from which exact alignment
accuracy is acquired is adopted.
16 games are covered with use of eight
tuning keys and Shift keys.
One-touch random-pre-set tuning which calls
direct the office which he wishes out of 16 games which had adopted "4 Way
tuning mechanism" as the memory mechanism, and carried out the memory,An
electric wave is discovered automatically, it aligns and last channel memory
tuning which tunes in automatically く auto tuning, manual tuning which receives
the broadcasting station of a weak electric wave, and the office received at the
last can be performed.
While setting the PLL comparison frequency for
exact tuning as 25kHz outside an audio frequency band, the beat and noise in an
audio zone are canceled, such as adopting a static control system display.
The front end part serves as the Bala Cuthah diode of an analog type
triple, and a design by J-FET.
Moreover, the ceramics filter of constant
amplitude and constant delay characteristic is adopted as IF stage.
When
receiving weak FM stereo of an electric wave, MPX-NR which reduces noise
automatically is carried.
This function can also be turned on and off.
Two steps of 3 terminal type high selection degree ceramics filters, LC
type filter, and the low impedance type loop antenna strong against a
fluorescent light noise are used for the AM section.
The memory backup
function for about 30 days is carried.
|
| Form |
AM/FM stereo tuner |
| <FM tuner part>
|
| Received frequency |
76-90MHz |
| Intermediate frequency |
10.7MHz |
| Antenna terminal |
Terminal type
75-ohm disequilibrium, a
300-ohm balance |
| Practical speed |
11.2dBf |
| Signal to noise ratio sensitivity of 50dB
|
stereo:38.5dBf
mono:21.6dBf
|
| The degree of execution selection
|
50dB (±400kHz) |
| Capture ratio |
1.5dB |
| IF disturbance ratio |
85dB |
| Image disturbance ratio |
45dB |
| AM oppression ratio |
50dB |
Muting operating-limits level
Stereo automatic
change operation level |
-94.8dB(mW) |
| Frequency response |
20Hz - 15kHz, and +0.2 -1.5 dB
|
| Auditory-sensation-weighting signal to noise
ratio |
stereo:76dB
mono:82dB |
| THD (1kHz) |
stereo: 0.15% (at the time of 90% abnormal
conditions)
mono: 0.08% (at the time of 100% abnormal conditions)
|
| Separation rate |
40dB(1kHz) |
| Output voltage |
0.6V (at the time of 100% abnormal
conditions) |
| <AM tuner part> |
| Received frequency |
522-1,629kHz |
| Intermediate frequency |
450kHz |
| Antenna terminal |
Terminal type (loop antenna attachment)
|
| Practical speed |
18 microvolts (300 microvolt/m) |
| The degree of 1 signal selection
|
35dB (±9kHz) |
| IF disturbance ratio |
60dB |
| Image disturbance ratio |
45dB |
| Signal to noise ratio |
52dB |
| THD |
0.6% |
| Output voltage |
0.18V (at the time of 30% abnormal
conditions) |
| <Synthesis>
|
| Power consumption |
7W |
| Power source |
AC100V, 50Hz/60Hz |
| Dimensions (a base, a knob, a terminal
included) |
Width 434x height 70x depth of 283mm
|
| Weight |
3.0kg |
|
|
|