Hey Jim, what tubes have you tried in your VK-30. BTW, I got the phono card in OK, but then found that my TT had gotten trashed while in storage in my basement. Now using my "second" TT, a direct drive Denon. The card works fine and BAT was awesome with respect to assisting with the installation (even tho I had bought the piece used). So Bowlerds, if speed, quality and responsiveness of service is an issue, BAT is beyond excellent. Can't comment on the Herron, but I've been very happy with my 3i sonically as well.