Lo-D HT-354
¥ 34,000 (around 1979)
Commentary
An auto player that uses a unitorque motor.
The motor is equipped with a unitorque motor based on Lordi's proprietary technology.
The Unitorque Motor is a motor which obtained perfect circular motion from the principle. It consists of a doughnut-shaped rotor magnet magnetized with 8 poles and two sets of star-shaped flat coils offset by 22 ^ 5 degrees. The torque generated by these two coils and magnets is constant at any moment. This principle is called sin2Θ + cos2Θ = 1 ". The Uni-Torque Motor also adopts a simple structure that is brushless, slotless and coreless, and has significantly improved durability.
Equipped with auto return and auto cut auto mechanisms that enable reliable tracing even with light needle pressure cartridges.
Equipped with anti-skating mechanism, strobe with neon lamp, and oil dump type arm lifter.
Model Rating
Type | DD auto-player system |
Phono Motor Section | |
Drive system | DD Auto |
Motor | Flat type commutator DC servo motor (unitorque motor) |
Turntable | 310 mm φ Aluminum Die-cast |
Constant speed | 33 1/3, 45 rpm |
Speed change | Electronic control system |
Speed adjustment range | 33 1/3rpm : + / - 3% 45 rpm : + / - 4% (Common adjustment for both speeds) |
Wow and flutter | 0.03%(WRMS) |
Signal-to-noise ratio | 75dB(DIN-B) |
Tone Arm Section | |
Tone arm | Needle pressure direct reading static balance type pipe arm Head shell replacement system |
Effective arm length | 220mm |
Overhang | 15mm |
Tracking error | 2 ゜ |
Needle pressure adjustment range | 0 ~ 3g/1 Rotation (Direct Reading in 0.1g Steps) |
Applicable Cartridge Weight | 4g ~ 10g |
Cartridge Section | |
Cartridge | MM Type (MT-24) |
Frequency characteristic | 10 Hz to 25 kHz |
Output voltage | 3 mv (1 kHz, 50cm/s horizontal) |
Channel balance | 1dB |
Crosstalk | 25dB |
Needle pressure | 2g |
Needle to be used | 0.5 mil Diamond Needle (DS-ST24) |
<General> | |
Power supply voltage | 100 VAC, 50Hz/60Hz |
Power consumption | 4W |
External dimensions | Width 435x Height 128x Depth 375 mm |
Weight | 5.5kg |