I had a Decware SE84UFO 2.1 for 6 months and had to part with it. I purchased a NOS rectifier and 6DJ8 signal tube from Brent Jessee and have hung onto them, thinking Id buy another UFO. Thats not seeming to happen so these can go. These have minimal use over a 3 month period. They are true New Old Stock and barely broke in and sound absolutely fantastic with zero issues. They will last for decades to come.
The stock Decware output tubes that came with my UFO were great sounding tubes and I found the only improvement was the rectifier and signal tube, the two I have for sale.
Brent Jessee recommended both of these tubes and said they were both from the 1960s.
JAN CRC 5R4 GY: This is a very nice rectifier tube and also beautiful to look at!
Philips 6DJ8 Tube: I tried a few and liked this one the best with my UFO. This has Amperex origin and was manufactured by Philips in Holland.
You will notice an immediate improvement over your stock tubes. More depth and a much bigger sound stage. This was my second biggest sonic improvement to my UFO next to a WyWires Diamond power cord. (Excluding a ZRock2=WOW)!!
$175 PayPal FF and shipped. This is a very fair price for what these are.