Lo-D FT-320R
¥ 29,800 (released in 1976)
Commentary
This FM/AM tuner pursues basic performance and operability.
A wide-band AGC is adopted in the front end section to improve tuning characteristics and interference rejection capability.
The IF section uses a combination of a wide-band 4-element ceramic filter with good phase characteristics and a narrow-band tuning coil to compensate for slight phase waviness.
A PLL circuit is used for the MPX demodulation circuit.
The internal oscillator of the PLL uses an epoxy-coated Styrofoam capacitor, which is stable against temperature and humidity, to achieve stable operation.
The RF coil uses a special mold type that is stable against environmental changes.
The AM IF circuit uses a triple-tuned IF filter to improve selectivity.
Uses a 2-meter system for signal and tuning.
Equipped with an MPX noise filter, it can effectively cut the high-frequency noise of the FM stereo broadcast transmission.
Equipped with a low-pass filter.
Equipped with FM muting and FM indicator.
Ferrite antenna is used for AM antenna.
.JPG)
Model Rating
| Type | FM/AM Tuner |
| FM Tuner Section | |
| Practical sensitivity | 1.9 μ V (S/N 30 dB, 30% modulation effective input) |
| S/N | 75 dB (100% modulation, 1 mV input) |
| Total harmonic distortion rate (400 Hz) | mono:0.2% stereo:0.5% |
| Capture ratio | 1.5dB |
| Effective selectivity (IHF) | 65dB |
| Separation | 30dB(100Hz) 41dB(1kHz) 30dB(10kHz) |
| Image interference ratio | 53dB |
| IF interference ratio | 95dB |
| Spurious interference ratio | 90dB |
| AM suppression ratio | 55dB |
| Carrier leak suppression ratio | 60dB |
| Antenna | 300 Ω Balanced Type, 75 Ω Unbalanced Type |
| <AM Tuner Section> | |
| Practical sensitivity | 12 μ V (IHF) 250 μ V/m (bar antenna) |
| Selectivity | 35dB |
| S/N | 40dB |
| Image interference ratio | 56dB |
| IF interference ratio | 36dB |
| <General> | |
| Output Level / Impedance | 300 mv (400 Hz, 30% modulation) |
| Semiconductor used | Transistor : 8 FET : 1 IC : 2 Diode : 18 pcs |
| Power supply voltage | 100 VAC, 50Hz/60Hz |
| Rated power consumption (Electrical Appliance and Material Control Law) | 10W |
| External dimensions | Width 390x Height 126.5x Depth 370 mm |
| Weight | 4.7kg |