I've bought both NOS/milspec -DR version & new production -PI from tubestore.com. While the -DR is better, the -PI sounds fine, particularly at $18. IMO there are better places to put money than into an $80 -DR.
Yep, I agree with Dgarretson. I had a Premier 140 with the stock EB 6N30's and bought a pair of DR's. There was a small improvement in bass and dynamics, but I heard far greater changes with various 6922 input tubes and with output tubes such as NOS Tung-Sol 6550's. If you really want to hear what this amp will do get some NOS T-S 6550's and forget worrying about the 6N30.
I'm not really worried about the tubes, I think the amp sounds fine the way it is. Problem is, one of them died a horrible death Sunday, so I needed a new pair. I just ordered a pair of the regular Sovteks from Jim McShane. But thanks for all the input guys. Output tubes are definitely next on the list.
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