|
| DIATONE DA-F10 |
|
| 50,000yen(around the 1976 time) |
It is a FM/AM tuner of Feature series.
The 4
pole phase linear LC block filter was used for the mixer stage of the front end,
and the 6 pole phase linear LC block filter was used for IF stage, and also PLL
IC was adopted as the MPX stage, and the low distortion and the high separation
are realized.
The newly developed lock tuning circuit is adopted and
exact alignment is enabled.
It is maintained even if an aligning point has
change of temperature and humidity, and the low distortion and the high
separation are obtained.
It is possible to switch the degree of
selection of IF stage to Narrow and Wide.
At the time of Narrow, IF stage
serves as a high selection degree tuner by the composition of a +4 6 pole phase
linear LC block filter ceramics filter.
Moreover, at the time of Wide, with
a 6 pole phase linear LC block filter, IF stage serves as the group delay flat
characteristic, and serves as a low distortion tuner.
With the
concentrated type filter of the dual gate MOS FET and the mixer stage, it is the
front end which was excellent in the inter-modulation disturbance
characteristic.
The control system IF circuit is the dedicated
communication circuit which became independent of a signal system IF circuit.
Thereby, the delay characteristics of a signal system IF circuit and an
amplitude characteristic are not disturbed, but it has a bad influence on the
basic engine performance of a tuner.
|
| Form |
FM/AM tuner |
| <FM tuner part>
|
| Practical speed |
1.8 microvolts, 10.4dBf (IHF)
|
| The degree of effective selection
|
Wide:45dB
Narrow:75dB |
| Capture ratio |
Wide:0.8dB
Narrow:1.5dB
|
| AM oppression ratio |
Wide:60dB
Narrow:55dB |
| THD |
Wide: 0.1% (1kHz, stereo)
Narrow: 0.3%
(1kHz, stereo) |
| Separation |
Wide:50dB(1kHz)
Narrow:40dB(1kHz)
|
| S/N |
Monophonic recording: 75dB
Stereo: 70dB
|
| Image disturbance ratio |
85dB |
| IF disturbance ratio |
90dB |
| Spurious disturbance ratio |
85dB |
| Frequency response |
30Hz-15kHz±0.5dB |
| <AM tuner part>
|
| Practical speed |
50 dB/m (a bar antenna, IHF)
|
| The degree of selection |
25dB |
| S/N |
55dB |
| Image disturbance ratio |
40dB |
| <Audio part>
|
| An output/impedance |
450mV/5kohm (FIXED 100% abnormal
conditions)
0-1.2V/2kohm (VARIABLE 100% abnormal conditions)
|
| <Synthesis>
|
| The number of semiconductors |
3FET, 5IC, 35Tr, 19Di |
| Power source |
AC100V 50Hz/60Hz |
| Power consumption |
15W |
| Dimensions |
Width 425x height 169x depth of 264mm
|
| Weight |
7kg |
|
|
|