The Pre-amp has 2 6922's I was planning on making sure the tubes matched. I am not sure what you mean by dual triode.
I found a quad of Phillips JAN 6922 very reasonable priced but have not tried yet. They are supposed to be a very good value in 6922's. Does anyone have any experience with them.
I found a quad of Phillips JAN 6922 very reasonable priced but have not tried yet. They are supposed to be a very good value in 6922's. Does anyone have any experience with them.