JP11A JP12A jumpers for 6922 tubes in BHK Preamp

Audio Components Amplifiers
1

Hello,

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?

thanks,
Dmitry

2

The jumpers should only have two sockets, not three. You would change them from jumping the middle and right pins to the left and middle, leaving the right open. So just move them over one pin.