Complete Power Supply System
KAB began its relationship with the 1200 in 1994 with our Broadcast Standard version which featured 78 rpm. We were the first to introduce the 1200 to audiophiles, when we added the TD-1200 tonearm fluid damping system in 2000. We introduced the very first outboard regulated power supply for the SL1200 in 2003. The PS-1200GX is our latest design to address the entire power system of the Technics SL-1200/1210 MK2, 3, 5 and M5G series turntables.
The PS-1200GX provides a very clean, quieter than a battery DC voltage. It eliminates three sources of sonic contamination: The electromagnetic field and mechanical vibration of the internal transformer; and the large peak-to-peak ripple voltage of the internal power supply. It is a complete system consisting of an efficient power conditioner, updated internal regulator(DC-1200) and strobe lamp on-off switch(SX-1200). We never stop improving; The PS-1200GX is our latest solution to the entire power supply system and it sells for less than half the cost of old fashioned alternatives.
Since the PS-1200GX is external and no low frequency transformers of any kind are used, all original sources of mechanical vibration and low frequency EMF are eliminated. The 'table plays quieter. Sonically this enhances low level resolution and intertransient silence. The PS1200GX can be located close to the turntable without fear of hum fields radiating into the cartridge. This cannot be said for many of the overpriced old fashioned alternatives out there which house conventional unshielded low frequency power transformers in non ferrous aluminum boxes. Pretty as they are, these designs actually radiate more low frequency EMF into your listening space than the stock original internal transformer! Over 5 years old, many of them, those old fasioned designs are now, in our opinion simply overpriced, worrisome and technically out of date.
The KAB PS-1200GX meets the latest standards regarding power supply efficiency. It is a green design that consumes less than 0.5 watt in standby mode. It works in any country, on all standard line voltages.
Forever improving your 1200, The place for state of the art performance and value will always be right here at KAB.
Note: Installation of this product requires basic electronic skills. Tools requires are philips screwdriver and wire strippers. No soldering required..
The 1200 original power supply has very little reservoir capacitance, 470 uF. The bulk of the supply filtering is performed by the DC regulator, doubling as a capacitance multiplier. These circuits are common, but they are not optimum. The PS1200GX system replaces the internal regulator with our updated DC-1200
By incorporating a choke input, large reservoir capacitor and dynamic shunt noise filter, the DC leading into the 1200 is now a clean source of power. This lets the internal regulator do a better job of regulating the motor load.
Also, since the internal power transformer, is deactivated, an additional source of EMI and mechanical vibration is eliminated. The turntable plays quieter.
The PS-1200GX uses no low frequency transformers of any kind, eliminating all sources of low frequency EMF. The kind that can cause audible hum.
Both DC-1200 and SX-1200 are included in our complete power supply system, the PS1200GX. As a complete system, the PS1200GX reigns a tight control over the power distribution within your 1200 assuring the best possible performance.
| GREAT FEATURES
To gain international approvals, I wanted to
use a high quality switching power supply as the front end of the new design.
Switchers are economical, fully certified and very light weight. The only
purpose of the switcher is to provide a fully regulated 28 VDC input to the DC
conditioner. The real work was to come, developing the DC power conditioner.
The challenge is, how do you produce a practically noise free source of DC and
keep the series voltage drop to below 0.25V? The solution comes in 2 parts.
Choke input with large capacitor resevoir and a dynamic shunt active
Since the PS-1200GX is external and no low frequency transformers of any kind are used, all original sources of mechanical vibration and low frequency EMF are eliminated. The 'table plays quieter. Sonically this enhances low level resolution and intertransient silence.
The SENSE line detects the original power
switch in the turntable. This way you turn the PS1200GX on and off just by
using the original power switch.
Notes On Power Supply Design
If you are planning on building your own power supply, here are some hints.
|MORE 1200 PARTS|
KAB ELECTRO ACOUSTICS
PLAINFIELD, NJ 07062, USA