ROTEL RT-1220
¥ 59,000 (around 1973)
Commentary
FM/AM tuner which adopted newly developed MOS FET and 5 series varicon.
Ceramic filter is used for IF stage, and IC is used for IF stage and MPX circuit.
Equipped with de-emphasis and muting sensitivity switching.
Equipped with two output circuits and headphone jacks.
Model Rating
| Type | FM/AM Tuner |
| FM Tuner Section | |
| Antenna impedance | 300 Ω equilibrium 75 Ω unbalance |
| Sensitivity (IHF) | 1.5 μ V |
| Harmonic distortion factor | Not more than 0.5% |
| Signal-to-noise ratio | 70 dB or more |
| Image interference ratio | 110dB |
| Spurious response | 110dB |
| Intermediate frequency interference ratio | 110dB |
| Capture ratio | 1.0dB |
| Selectivity | 90dB |
| Separation | 40dB(1kHz) |
| SCA suppression ratio | 60dB |
| AM suppression ratio | 52dB |
| <AM Tuner Section> | |
| Sensitivity | 15 μ V (S/N = 20 db) |
| Image interference ratio | 75dB(1MHz) |
| Intermediate frequency interference ratio | 75dB(1MHz) |
| Signal-to-noise ratio | 50dB |
| Selectivity | 40dB |
| <General> | |
| Semiconductor used | Transistor : 31 FET : 3 IC : 3 Diode : 19 units Ceramic Filter : 4 Pieces |
| Power consumption | 30VA |
| External dimensions | Width 420x Height 140x Depth 304 mm |
| Weight | 8kg |