ROTEL RT-325
¥ 27,900 (around the early 1970 s)
Commentary
An FM/AM tuner with high sensitivity and stability designed by skillful circuit technology.
High sensitivity and excellent interference rejection capability are obtained by the use of the front end which combines a precision triple varicon and low-noise FET.
It also uses a 4-stage amplified IF circuit.
Equipped with an FM mono / stereo automatic switching circuit. When FM broadcasting changes from mono to stereo, an electronic switch automatically operates to enable stereo reception.
Equipped with a tuning meter.
It is equipped with a muting switch to suppress inter-station noise during FM broadcast channel selection.
Model Rating
| Type | FM/AM Tuner |
| FM Tuner Section | |
| Receiving frequency | 76 MHz to 90 MHz |
| Antenna impedance | 300 Ω equilibrium 75 Ω unbalance |
| Sensitivity (IHF) | 2.2 μ V |
| Total harmonic distortion factor (400 Hz, 100% modulation) |
mono:0.5% stereo:1% |
| Signal-to-noise ratio | 65dB |
| Image interference ratio | 60dB |
| Spurious response | 80dB |
| Intermediate frequency interference ratio | 80dB |
| Capture ratio | 3dB |
| Selectivity | 45dB |
| Separation | 35dB(1kHz) |
| SCA suppression ratio | 60dB |
| Subcarrier suppression | 40dB |
| Stereo mono auto level | 50dB |
| Audio output | 1.5V |
| De-emphasis | 50 μ s |
| <AM Tuner Section> | |
| Receiving frequency | 535 kHz to 1,605 kHz |
| Practical sensitivity | 25 μ V (S/N = 20 db) |
| Image ratio | 50dB(1MHz) |
| Intermediate frequency interference ratio | 50dB(1MHz) |
| Signal-to-noise ratio | 50dB |
| <General> | |
| Semiconductor used | Transistor : 19 FET : 1 Diode : 10 pcs |
| Power supply voltage | AC100V/120V/200V/240V, 50Hz/60Hz |
| Power consumption | 12VA |
| External dimensions | Width 358x Height 120x Depth 235 mm |
| Weight | 3.9kg |