Attach the tester clips across the primary winding of the transformer. Observe the Ring Count: Press the test button.
The tester is widely available as a DIY kit or pre-assembled unit: Anatek Blue Ring Tester Assembly and Review HD
A: The original commercial unit (circa 1990s) had a blue anodized aluminum enclosure and a circular (ring) probe tip. The name stuck. blue ring tester schematic diagram exclusive
Many online copies of this schematic incorrectly label C4 as 100pF. Our analysis shows that 10pF is correct for the 100kHz-500kHz range. Using 100pF dampens the ring too quickly.
: Pin 2 (Inverting) and Pin 3 (Non-inverting) monitor the dampening AC wave. Two Attach the tester clips across the primary winding
The Blue Ring Tester is more than just a gadget; it is a practical example of how a clever analog circuit can solve a problem that expensive digital equipment struggles with. Its ability to instantly assess the Q of a coil—and thus detect the elusive shorted turn—makes it a must-have in the workshop of any electronics repair technician, especially those working with switch-mode power supplies, flyback transformers, and deflection yokes.
before connecting the tester Share public link The name stuck
Low Q-factor. Could be a partial short or a low-quality inductor. 6+ LEDs (Blue): High Q-factor. The component is healthy. Why This Schematic is "Exclusive"