Chakster hasn't been on here in quite some time.
BillWojo
How good is the Micro Seiki DDX-1000 Direct Drive turntable ?
The DDX-1000 is the original design, with two sculpted strobe markings around the 2kg / 31cm die-cast aluminium platter. The resulting moment of inertia is at 330kg / cm2 and the top mat in fact covers a thick cork sub-mat set inside the platter itself.
The DDX-1000, in real late 70s modernism is a direct-drive. The motor is a DC-Servo with FG frequency generator reference set through the strobe neon lamp which "checks" how many stripe it sees and rectifies if necessary ; the resulting speed accuracy is of 0,03%.
The starting torque is of 1,2kg / cm and load characteristics allow the DDX-1000 to remain below 0,04% deviation up to a 3g load set at the outer limit of the platter - specs-wise, we're here under the contemporary Sony TTS-8000 for instance...
The heigh-adjustable feet are typical Micro Seiki (or Luxman, of course :) and contain a mix of inert damping (neoprene stuffing) and mechanical damping (spring).
The is no Quartz Lock on the DDX-1000 ; the MD-1000 power-supply box holds the power on/off, start 33rpm, start 45rpm and stop buttons plus two ± 6% speed controls.
The AX-1G to AX-6G tonearm bases fit everything from the ubiquitous SMEs to the Technics EPA-100 or PUA-1600L.
Of course, the motor of the DDX was used as basis for the Marantz Tt 1000 (1979), and that of the DQX-1500 (an updated DQX-1000) for the Tt 1000 mkII (1992). And, as often, Micro's direct-drive motors came from... Victor.
DDX-1000/G :
April 1976 limited edition (really limited : 30 units) custom made in... bronze. Howerever, it is black-looking for the most part, with the bronze only kept visible for the top of the three feet ; the platter was kept in AL and the command box was anodized in all-black style ; even the AX-1/G was in-bronze-but-painted-black...
Names of the people they were made for (and offered to - these were gifts !) were silkscreened on the (bronze...) motor's cache (...but painted black) - a rarity to say the least.
The DDX-1000 naturally spawned a myriad of lookalikes and still does today - perhaps better than the original, perhaps not. Or not that much :)
I think Chak’s last post was around February, 2021. Since then he is off this grid. I repeat, Dang, you are best off to check the speed accuracy unloaded and under load (with cartridge engaged on an LP). If speed is stable, brakes can be repaired. If the brake does work but does not bring the platter to an immediate stop, that may indicate a need to re-calibrate the servo. Again, most good techs can re-calibrate. |
Daer @dangcaonguyen : The schematic in this link can helps you or helps to your technician:
https://www.vinylengine.com/library/luxman/pd-444.shtml
Regards and enjoy the MUSIC NOT DISTORTIONS, R. |
Thanks @rauliruegas Raul for the link. Also, does anyone knows how long does it take for the speed to lock in after switched? Mine is taking a few seconds for the light to stop blinking. Is it normal?
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