Quote: Originally Posted by ezzieyguywuf /img/forum/go_quote.gif Oh, sorry. I did see your previous post but disregarded it as I've rewired my pot once already, and triple checked against the datasheet to make sure I wired it correctly. Here is the datasheet I'm talking about. Excuse my screenshot, I couldn't be bothered to GIMP out the image from the pdf. As per that image, I've got pins I2 and II2 going to the pot "grids" (I'm unfamiliar with that term), I got I3 and II3 going to the RCA jacks, and I1 and II1 are my ground. Is this not correct? Looking at my pot from the back, the six pins are wired as follows: RCA L, RCA R, GROUND, GROUND (I jumped the two), GRID L, GRID R This corresponds to the image I posted, which shows the pins with a "view from mounted part side". My extreme zoom on there blocked out that foot note. Please, tell me if I'm wrong as I'd love to get this thing up to 100%. My power switch has a LED, and this thing pulses two or three times when I first power it up. I guess this is normal? You almost got it right. It seems only one of your channels is wired in reverse According to the datasheet pinout here's how it should go: RCAL - RCAR - GRIDR - GROUND - GROUND - GRIDL I3 - II3 - II2 - II1 - I1 - I2 Just to clarify it a bit, label "II" corresponds to one 'pot' (for the right channel in your build) and label "I" corresponds to the other pot. Pin 2 on both sections corresponds to the wipers, pin 1 goes to ground, pin 3 to the inputs. Also, I couldn't find in the datasheet something that told me if the pinout was looking from the front of the pot or from the back... but I only skimmed over the datasheet The pulsing at startup is normal. When cold, the tube heaters (filaments) draw much more current, so much so that they look like a short circuit to the power supply which starts up, shuts down due to the "short", comes up again, etc.. after some such cycles, the heaters have warmed up a bit, and their current demand lowers to the point where the power supply can cope with it. Then the supply stays on (no more pulsing) and the heaters start glowing. BTW, nice Linux desktop I'm also a *IX user. cheers!