Before @atomicbob published his measurements for the LP, I purchased this linear power supply: https://www.ebay.com/itm/Custom-make-Linear-power-supply-for-pro-ject-Phono-Box-RS/122866202627?ssPageName=STRK:MEBIDX:IT&_trksid=p2060353.m2749.l2649. It was custom made for 36V and 1.5A. It arrived a few days ago and worked with no problems for the first day. Now, though, I find that the amp will power up when I turn on the linear power supply, even when the amp power button is in the off position. The tubes light up and the led light will turn from red to green, though there isn't the click that usually comes when the light changes color. I also notice that the amp gives up a soft whining sound when the power button isn't pushed in. The amp still works normally when powered on, but it just won't turn off. Does anyone know what could be the issue?