Recently bought a 6j1tube pre amplifier board and built up a small pre-amplifier. My question is in the directions it says to short the jumper for if your using a 12v or 18v transform. I’m completely confused and obviously a newbie and haven’t found anything online that would make me confident enough to do it myself. Could someone please help. I’m using a 12v r-core transformer
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It looks like the pcb is already jump for 12v that's the same as the image for 2 red squares.
If you use 18v, you don't jump the red but jump the blue only.
Make sure you need dual 12v or 18v: 12-0-12 or 18-0-18, should have 3 wires input.
If you use 18v, you don't jump the red but jump the blue only.
Make sure you need dual 12v or 18v: 12-0-12 or 18-0-18, should have 3 wires input.
I already have the dual 12v transformer at 30watts. In the directions is says short out the jumper depending on what voltage you were going to use. Just confuses me but if looks like it’s already jumped for 12v then that’s a good thing. I turned everything on last night before realizing I had forgotten about the jumper thing and turned everything off immediately. Thank you for the help