I agree. I use them on my KT150 build.
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I hope you got the octal board. With better caps, and the Linlai E-6SN7 tubes you can't get much better, unless you buy Don Sach's amp. His is built upon the same kit, but he blows it up with premium parts, and big improvements to the power supply. Regardless, I'm sure it sounds great as is though!
My board uses the 6922/6DJ8 tubes and I'm using NOS Siemens tubes. I didn't know there was an option for boards.
Don helped me out with some noise issues I was having in 1 channel along with giving me some tweeks to do..such as replacing some of the electrolytic caps in the P/S with film caps. I also replaced quite a few resistors with Texas Instruments TX2575, Takman metal film, and Audio Note Niobium in the audio circuit.
If you scroll down you'll see the board right below the 6DJ8 board. Mind you, the 6DJ8 board is a big improvement over the stock Dynaco board in and of itself. Roy really knows his electronics, but he doesn't seem to me to be the tinkerer that Don Sachsis. Don has been modifying primarily Citation and McIntosh gear for decades now.