4 x 6P3S-E / 5881 / 6L6GC tube (own box) () = $32.00 Sub-Total: $32.00 Table Rate (Air Mail): $12.00 Total: $44.00 That's right. For the paltry sum of $44.00 American I received 4 brand new 6L6GC tubes straight from mother Russia. The Svetlana Winged "C" EL34s I had in the ST70 sounded pretty good to me. Dam good in fact. The 6L6GC's were bought on a lark after reading about them on here. I figured WTH for that price, about a third of what the "C"s cost me. And since I can bias and balance each channel (thanks to that CV PS board) I don't need to pop for a matched quad. I biased these at 42mV and 0 balance on each channel. It'll be interesting to see if these will let my PT run a little cooler. On the Dynamull driver board I have two RCA cleartop 6CG7's and two Zenith 6EJ7's. At first impression, they sound pretty good. A bit more distinct than the EL34's with a bigger soundstage and cleaner midrange They seem a wee bit short on the lower bass notes, but that may come after a few more hours. If you have an ST70, I would recommend you try these. And at the price, I just don't see how they can be beat. I'm thinking about ordering another set as a spare. And again, I cannot recommend the Classic Valve Power Supply board enough.