KAB SX-1200

    While developing the PS-1200 outboard power supply, internal measurements showed a high frequency pulse noise interference being generated by the strobe lamp itself. Since the strobe lamp is only needed to set speed changes, it seemed like a wise idea to develop a strobe disabler.

The circuit installs quickly with only 3 wire connections. In use you simply hold the start-stop button down for 5 seconds and the lamp will disable. Hold again for 5 seconds and the lamp returns on. The lamp will always be on when first turning the turntable on.

The elimination of this 100 mA noise pulse further improves the efficiency of the internal voltage regulator and may improve micro motor control by eliminating a source of noise contamination.

Price & Purchase

SPECIFICATIONS

• Digital IC Timer
• Reliable 5V operation
• 6 second alternate action
• Simple 3 wire hookup
• Shipping Weight 0.5 Lbs

   Built for reliability, I chose a digital timing approach using reliable cmos integrated circuits. A CD4093 serves to buffer the input and provide a steady pulse generator. A CD4017 decade counter serves to divide and extend the action time. A CD4013 flip flop produces the alternate on-off-on action.

   In use, the CD4093 generates one pulse per second when triggered. The CD4017 is tapped at the #6 output and so indicates every 6 seconds triggering the CD4013 flip flop. This in turn gates a transistor switch which finally enables or disables the strobe lamp.

• 1 Year Warranty
• Easy Hookup
• Neat Hidden Operation

   The really great features to take note of with the SX-1200 are the easy hookup and the peace of mind disabling the strobe lamp offers

   The strobe lamp is not an obvious source of noise, but in reality the 100mA current spikes are quite substatial.

   The neat hidden circuit keeps the clean appearance of your 1200 totally stock and clean.