So I’m trying to replace default 12AU7 tubes with Siemens 6922 NOS. I understand I need to change these jumpers, but I’m confused to what position.
Right now it’s 1 open on the left. The jumper itself has 3 pins.
So should I move the jumper to the left keeping 1 PIN open on the right?
OR should I move the jumper so that all 3 pins are covered?