https://jestineyong.com/common-faults-in-linear-transformer/ Semiconductors, Test Equipments, Circuit Board Troubleshooting, Electronic Repair Courses and Many More! Sun, 24 Jun 2007 10:15:36 +0000 hourly 1 https://wordpress.org/?v=5.4.19 https://jestineyong.com/common-faults-in-linear-transformer/comment-page-1/#comment-18 Sun, 24 Jun 2007 10:15:36 +0000 https://www.jestineyong.com/?p=36#comment-18 I have many 110v adaptors (linear power supply) which came from the US together with the consumer electronics they power up, unfortunately here in the Philippines we use 220v. I use stepdown transformer but they give off too much heat & consume power even when the appliance is off. Then I tried the trick of getting 110v by using only one of the electrical lines and the grounded GI water pipes, which worked well until the pipes were replaced by plastic PVC. I happen to open one of the adaptors and I saw the transformer primary has an unused tap which turned out to be for 220v use, yessss! But then the rest have only 110v primary. How i wish there's an easy way to convert those transformer into 220v...

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