I have the Matsushita's 6dj8's and Tung Sol 5881's. I really like the sound of my VK5i with these tubes. Even changing the 5881's was noticeable over the stockers.
I also have Herbies Halo's and placed them almost 1/2 way down each 6dj8 tube.
I also have Herbies Halo's and placed them almost 1/2 way down each 6dj8 tube.