Eee3, I did not say I did not hear a 6H30 difference. I said the difference was minimal compared to the major differences between 6922/6DJ8 for which you related to. Please note again that I wrote "claims of major differences", and not, "claims of differences".
If you read the various ARC LS26 and Ref3 threads where people have written about differences with 6H30 tubes, you will see that the consensus there that the observed differences are minimal. Again, my comment was not of absolutes but rather a relative vs. differences between tubes of other types.
Compare an Amperex 6922 PQ or Telefunken 6DJ8 vs. the stock Sovtek 6922 in your ARC PH3SE. And then compare the 6H30 DR vs. common Sovtek 6H30 in your ARC LS25 II. You will then know the point I tried to make before.
If you read the various ARC LS26 and Ref3 threads where people have written about differences with 6H30 tubes, you will see that the consensus there that the observed differences are minimal. Again, my comment was not of absolutes but rather a relative vs. differences between tubes of other types.
Compare an Amperex 6922 PQ or Telefunken 6DJ8 vs. the stock Sovtek 6922 in your ARC PH3SE. And then compare the 6H30 DR vs. common Sovtek 6H30 in your ARC LS25 II. You will then know the point I tried to make before.