In this post I will share with you all the info you will need to make a homemade ring tester also called a FBT/LOPT tester, note FBT= Fly Back Transformer, LOPT= Line Output Transformer.
Although originally designed to test flyback transformers this tool is used more often today for checking the primary winding of SMPS transformers for shorted windings and also the primary and secondary windings of high voltage transformers found in inverter circuits along with other high Q inductive components.
Click here for the assembly manual for the original dick smith ring tester which is no longer in production. This manual includes a schematic and a parts list.
Below are some pictures of the beautiful ring tester my good friend Behzad made using the schematic and parts list from the included assembly manual.
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I designed the Dick Smith ring tester. Glad you've found it useful. :)
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