Brianw, the 6SN7's are early 60's Russian, no less, that Kevin is using on the VK-60 retube. There are 2 different ones for the 2 front tubes ($5 more as well). They may not look as nice as American made, but the sound is really good!
BTW, these tubes are also available from ATSI, but with no differentiation between the 2 front tubes and the 6 back tubes.
BTW, these tubes are also available from ATSI, but with no differentiation between the 2 front tubes and the 6 back tubes.