j1-2-3 rectifier https://antena.tokyo/%e3%83%88%e3%83%88%e4%ba%88%e6%83%b3%e3%80%80j1-2nd-%e7%ac%ac%ef%bc%93%e7%af%80%e3%80%80%e4%ba%88%e6%83%b3%e3%81%a8%e6%a4%9c%e8%a8%bc/j1-2-3-rectifier/