I did not know that could be done. A 12 type tube is 12 volts and a 6 type tube is 6 volts! Are you sure you won’t damage the preamp?
Tube rolling - 12AU7 to 6922 adapter
I thought I’d transfer this thread over to this discussion category from tech talk. I recently changed preamps - from 12AU7 circuitry to 6922. Yet, over the years, I’ve accumulated a sizable stash of NOS 12AU7’s - some of which I really enjoy.
At @kdude66’s suggestion, I purchased these 12AU7 to 6922 adapters. My main concern was damaging my pricey new preamp. No problem. It’s sounding kind of great! These adapters are built very well using real ceramic sockets. They fit snugly in the 6922 sockets. For those using components with 6922 tubes, this opens up a whole new world of 12AU7 tube-rolling possibilities. The only drawback is that they add about 7/8" height. So, I need to build a riser to raise the preamp lid. It should be simple.
At @kdude66’s suggestion, I purchased these 12AU7 to 6922 adapters. My main concern was damaging my pricey new preamp. No problem. It’s sounding kind of great! These adapters are built very well using real ceramic sockets. They fit snugly in the 6922 sockets. For those using components with 6922 tubes, this opens up a whole new world of 12AU7 tube-rolling possibilities. The only drawback is that they add about 7/8" height. So, I need to build a riser to raise the preamp lid. It should be simple.