TRIO ST-740X
¥ 79,900 (around 1966)
Commentary
Stereo component for FM multi-broadcasting.
Receiver section
Uses a receiver (tri-amp) that uses a vacuum tube.
The amplifier section is equipped with a low filter and a high filter.
The tuner section is compatible with FM multi stereo broadcast transmission.
Equipped with SCA filter and FM AFC.
Player part
A pipe arm is used for the tone arm.
The drive motor is equipped with a synchronous motor that does not require fine adjustment of speed.
DC ignition is used for the equalizer amplifier section.
The cartridge is equipped with a MM type cartridge.
Uses a hard cantilever and special damper.
Speaker part
2-way 3-speaker configuration.
Two 16 cm cone units are installed in the middle and low range, and a 6 cm cone tweeter is installed in the high range.
The enclosure uses a bass reflex system.
Other
The exterior is finished with polyester.
Model Rating
| Type | Stereo component | |
| Receiver Section | ||
| Tuner Section | ||
| Receiving frequency | FM | 76 MHz to 90 MHz |
| AM | 535 kHz to 1,605 kHz | |
| Sensitivity | FM | 5 μ V/84MHz (30% modulation, S/N30dB) |
| Image ratio | FM | 30 dB or more |
| AM | 40 dB or more | |
| Frequency characteristic | 20 Hz to 20 kHz ± 1 dB | |
| Signal-to-noise ratio | FM | 60 dB or More (100% modulation, 1 mV input) |
| AM | 45 dB or More (30% Modulation, 1 mV Input) | |
| Separation | 35 dB or More (400 Hz) | |
| Distortion factor | 1% or Less (400 Hz) | |
| Amplifier Unit | ||
| Output | 14W (7W + 7W, music power, 2% distortion) | |
| Frequency characteristic | 20 Hz ~ 20 kHz ± 1 dB (Output 500 mW) | |
| Input sensitivity (1 kHz input required for 5W output) | MAG:3mV Aux:190mV Ceramic:30mV |
|
| SN ratio (volume adjustment maximum, tone control flat, output 5W) | MAG : 55 dB or more Aux : 65 dB or more Ceramic : 50 dB or more |
|
| Residual noise | 0.5 μ W (minimum volume adjustment) | |
| Entire Receiver Section | ||
| Accessory function | FM stereo monitor FM AFC High filter Stereo headphone jack |
|
| Used vacuum tubes, etc. | 6BQ5x2 and others Total 14 balls 8 diodes |
|
| Pwer | 100 VAC / 117 V, 50Hz/60Hz | |
| Power consumption | 130VA | |
| <Player Part> | ||
| Model Name | ST-740XP | |
| Cartridge Section | ||
| Cartridge | MM Type | |
| Needle tip | 0.7 mil diamond needle | |
| Output voltage | 5 mv (1 khz, 5cm/s) | |
| Frequency characteristic | 20 Hz to 20 kHz ± 2 dB | |
| Crosstalk | -20dB or less (1 kHz) | |
| Output voltage difference | Within ± 1 dB | |
| Needle pressure | 3-4g | |
| <Turntable portion> | ||
| Drive motor | 4-pole synchronous motor | |
| Turntable | 25cm | |
| Number of revolutions | 16 2/3, 33 1/3, 45, 78 rpm | |
| Wow | Not more than 0.25% | |
| Tone Arm Section | ||
| Format | Static balanced type pipe arm | |
| Speaker Unit | ||
| Model Name | ST-740XS | |
| Method | 2-Way, 3-Speaker, Bass Reflex System, Floor Type | |
| Units Used | For low band : 16 cm cone x2 For high pass : 6 cm cone type |
|
| Frequency characteristic | 45 Hz to 18 kHz | |
| Max Input | 10W | |
| Crossover frequency | 5kHz | |
| <General> | ||
| External dimensions | Width 1,370x Height 730x Depth 375 mm | |
| Weight | 46.3kg | |