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jmltoys 21/04/2020
Fun kit but flawed design. After 4 days on with no load it died. More precisely one or more of the op-amps died. The opamops are rated for 30v max supply. The rectified transformer voltage is over 30 volts and the negative rail is biased about -5 volts, so the op am rating is exceeded. I cut a few traces and added a current limited 24V supply off the fan regulator with 100 ohm resistor and a 47uf capacitor. I only get about 20v out now, but it should last forever! Shown in my photos, I have installed it in a case from Banggood along with a digital meter. You need to also purchase the heatsink for the final drive transistor.
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  • Banggood Dear jmltoys,Thank you for your feedback and we are really sorry for all the inconvenience caused during your shopping and looking forward to solving your problem.We have already received your feedback for the order. We would like to try our best to provide you the best solutions. For this reason, if your questions have not been solved yet, please do not hesitate to contact us via the link: https://www.banggood.com/es/Contact-Us_hi111 and provide more details about your question so that we can confirm the case as soon as possible and solve it efficiently.And we will reply and offer you the best solutions after receiving your email within 24-48 hours.Best regards,Banggood Team

    17/05/2024
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