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How to judge whether the toroidal transformer cannot be used normally?

After buying the power amplifier transformer, how to judge whether it is good or bad? In fact, it is not that difficult. Once you learn it, you don't need to ask for help.

First, we judge from the appearance of the transformer to see if there are obvious bumps on the surface of the transformer; whether the winding coil is exposed, whether the appearance materials (such as wires, insulation films, wires, labels) are damaged, detached, burnt, etc.; then check whether the transformer wires have obvious signs of debonding, desoldering, burning, etc., and whether the iron core fastening screws are loose; after checking these appearances, we power it on to test whether it has obvious heating and hot phenomena during operation. If none of the above phenomena exist, then you can preliminarily break the quality of the toroidal transformer.

Power-on measurement: Use the AC gear of the multimeter to test the output line when power is on. If there is a stable voltage output, it is good. If there is no voltage output or the output voltage is not stable, it is broken.

Power-off measurement: When measuring with a multimeter, you cannot short-circuit. If the short circuit is close to 0Ω, it is broken. The greater the power, the smaller the resistance value, and the smaller the power, the larger the resistance value.

If you are interested in audio toroidal transformers, you are welcome to contact EEIO Transformer's online customer service staff at any time. EEIO Transformer's professional customer service is dedicated to serving you!