Re: What Mods to Early Rev 1 QCX Mini
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It¡¯s on the QCX Mini page on QRPLabs website. Use instructions for Rev1&2 but not the addenda for Rev2. The instructions to add a 10 uf tantulum or electrolytic capacitor to the voltage regulator are in the document. Be careful to never short the 5v rail to ground. Doing so will cause this regulator to fail shorted and it will put 12 volts on the 5 volt rail and destroy all the 5v components. There is a workaround to replace the 5v regulator with a 78M05 that doesn¡¯t have this issue.? Good luck. ¡73¡ Ron On Tue, Mar 12, 2024 at 14:15 Greg Tilford <GregTilford@...> wrote: Hi, I have an unbuilt Rev 1 QCX Mini (circa 2020) that I want to start, but I remember that there was some kind of a problem with, I believe, the power supply circuit.? Where will I find the documentation for a Rev 1 build and necessary modifications? |
Ronald Taylor