The ring tester is an inexpensive and effective way to test any high Q inductive component. It is especially useful for doing a quick check on flyback, line output transformers and other high frequency wound components like deflection yoke windings and SMPS transformers.The LEDs on the left side show the Q of the device being tested, more lights = higher Q, i. e.,no lights = short circuit, red = Bad or low Q,yellow = ??? or medium Q, green = Good or high Q.

The components in many circuits including display drivers, SMPS and tuning circuits contain low loss (high Q)

resonant circuits. The testing technique used in this design is based on the fact that many faults in magnetic

components result in increased loss = reduced Q.

Ring testing gets its name from the fact that a when fast voltage pulse is applied to a high Q circuit the tuned nature

of the circuit will produce a decaying AC voltage of several cycles. More cycles, or “rings”, means higher Q. Few

or no cycles indicates a problem in that component, a shorted winding or some other malady. This tester provides

a quick and easy way to track down such problems.

Below is the Ring Tester I recently purchased from ANA TEK and it is extremely nice.It is also small so I can bring it in the field with me easily.I have only had it a short period of time and I already love it.This is a must have tool that will get much use,a great addition to any electronics technicians tool kit.

                              Click the photo for more info on The Blue Ring Tester

Below are some photos of the one I assembled from the kit.Please note the test leads are not the ones that come with the tester, I added these because they are the test leads i prefer.

                      Excellent Design                                                                Very High Quality Components

Tests in circuit, & test leads are non-polarized Easy-to-read, high brightness red, yellow and green LEDs display the Q of the device being tested.Simple operation for fast easy diagnosis of faulty inductive components.New Improved design increases sensitivity for low impedance components such as SMPS transformers and deflection yokes.