Lo-D FT-5000
¥ 55,000 (released in 1979)
Commentary
FM/AM digital synthesizer tuner with built-in microcomputer.
The microcomputer enables quick tuning of the desired station simply by pressing the up / down tuning button. The computer catches the broadcast wave by sweeping the reception frequency every 100 kHz for FM and every 9 kHz for AM.
The tuning point is controlled by quartz so that accurate tuning is possible.
Equipped with a memory key, you can preset 7 stations for both AM and FM.
The memory setting method is completed by receiving the station you want to store, pressing the memo Leaky, and pressing the button of the desired channel while the memory write display is lit.
By the quartz synthesizer method, it is quartz locked every 100 kHz for FM and every 9 kHz for AM, and the tuning point remains stable for a long time without distortion.
Double-tuned RF section using front-end dual-gate MOS FET realizes high gain and high selectivity of RF section.
In addition, the use of a wide-band AGC circuit prevents intermodulation interference that occurs in real fields with many medium-to-strong electric field stations.
The battery (AA x 3 pieces) can store preset frequency and last channel information, and the contents of the memory can be maintained even when the timer is connected and used for an unexpected power failure or recording absence.
You can use dry batteries for about 2 years if you set them once.
The receiving frequency is indicated by a fluorescent indicator, and the station indicator tells you which preset channel is being received.
The muting circuit drives the reed relay with a Schmidt trigger circuit.
In addition to the mute suppression effect of more than -80dB, it also prevents the pop sound generated by key operation and power switch on/off, and realizes comfortable operability.
Equipped with 5-stage signal indicator by LED.
A 75 Ω coaxial connector is mounted on the FM antenna input.
Model Rating
| Type | FM/AM Digital Synthesizer Tuner |
| FM Tuner Section | |
| Receiving frequency | 76.1 mhz to 89.9 mhz |
| Practical sensitivity | 1.9 μ V (300 Ω, IHF) 10.8 dBf (new IHF) |
| SN ratio 50 dB sensitivity | mono:16.2dBf stereo:38.2dBf |
| Effective selectivity (IHF) | 75dB |
| Signal-to-noise ratio | mono:72dB stereo:68dB |
| Distortion factor | mono:0.12% stereo:0.2% |
| Separation (1 kHz) | 45dB |
| Frequency characteristic | 20 Hz to 15 kHz ± 1 dB |
| <AM Tuner Section> | |
| Receiving frequency | 531 kHz to 1,602 kHz |
| Practical sensitivity | 300 μ V/m |
| Signal-to-noise ratio | 50dB |
| Strain Rate (400 Hz) | 0.7% |
| <Others> | |
| Power consumption | 12W |
| External dimensions | Width 435x Height 105x Depth 273 mm |
| Weight | 4.4kg |