|
| ROTEL RT-1220 |
|
| 59,000yen(around the 1973 time) |
The FM/AM tuner which adopted newly developed MOS
FET and 5-unit variable condenser.
The ceramics filter is adopted as IF
stage. Moreover, IC is adopted as IF stage and a MPX circuitry.
The
demphasis and the muting sensitivity switchover are carried.
Two output
circuits and a headphone jack are carried.
|
| Form |
FM/AM tuner |
| <FM tuner part> |
| Antenna impedance |
300-ohm equilibrium
75-ohm unbalance
|
| Sensitivity (IHF) |
1.5 microvolts |
| THD |
0.5% or less |
| S/N ratio |
70dB or more |
| Image stonewalling ratio |
110dB |
| Spurious response |
110dB |
| Intermediate-frequency-jamming ratio
|
110dB |
| Capture ratio |
1.0dB |
| Selectivity |
90dB |
| Separation |
40dB(1kHz) |
| SCA supression ratio |
60dB |
| AM supression ratio |
52dB |
| <AM tuner part>
|
| Sensitivity |
15 microvolts (S/N=20dB) |
| Image stonewalling ratio |
75dB(1MHz) |
| Intermediate-frequency-jamming ratio
|
75dB(1MHz) |
| S/N ratio |
50dB |
| Selectivity |
40dB |
| <Synthesis>
|
| The semiconductor used |
Transistor: 31 pieces
FET: Three pieces
IC: Three pieces
Diode: 19 pieces
Ceramics filter: Four pieces
|
| Power consumption |
30VA |
| Dimensions |
Width 420x height 140x depth of 304mm
|
| Weight |
8kg |
|
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