In the meantime it'll also be interesting to hear your impressions of a return to the GU50...especially when you can again try the duo KT/GU50 combo per power channel...
...CJ
Wow so Richard89 helped spur on much of momentum for tube rolling in our group? He said he never had the Garage1217 amps though. And who made the dual adapter? My memory is actually worse than some of the elders.Good for you DL, looks like you are set for the next part of your musical journey, and I do remember Richard89 from the other threads. I still message some of the members on the Garage1217 thread. You remember, where we started out before Elise. He started us on tube rolling when he came up with the adapter for nine pin to seven pin tubes. And then he made the dual adapter and rolled all sorts of tubes. It was a good little amp. And of course the resident guru SolderDude. My anniversary amp was supposed to be here just after Easter, but Lukasz said with the virus it may be a little later. He had to divide up the staff to work two shifts to minimize the number of people in one place at a time. Should be here by the end of the month I assume, and then will burn it in, and compare my Euforia to the Anniversary amp, before I sell the Euforia. Looking forward to it.
I'm amazed at how Euforia has evolved here but hey it's all in the interest of enjoyment. Still enjoying your HD800 I hope. My son brought back the HD800 today and when I plug it into the Studio Six, it's electrifying. Am I the only one who love the unique tone of the HD800? 
I had a journey on this topic, catalogued here. First port of call: try some isolation feet. Sometimes the transformer can wobble and make noise in the valves due to the small movements. I started by chopping 2x tennis balls in half and putting them under the amp feet. You can also just quickly see: put headphones on, hear the hum. Lift the amp off the surface it is on (gently!) and see if the hum is the same or gone. As my ranty ref above says, it can be many things, unfortunately. Good luck to you.
UT, am still enjoying the HD800, they are my main phones. I have tried a few others and like them the best. Have had the Senn 650, 700, HiFiman 400i, 560, and the Empreyeans but these I sent back as the bass, on this particular phone distorted at the bottom. Were a little warm for my liking. H loves his, so that comes down to personal choice, and perhaps if mine did not have the distortion I would have gotten to enjoy them more. But always come back to the 800. Have a friend that was into phones for a few years, was over for some music demo. When he tried on the 800, you could see that wow factor on his face, and knew he was lost! I ended up buying a gently used pair, and gave him mine. They are a special phone, you need to give them a little time, and they reveal so much of the music. The blue comes from the adapters that H made, and he inserted a blue led in the bottom of the sockets. Pretty cool. H made the dual adapters as well. Great job too. Hope you and the family are doing well with this virus. Nasty stuff. Have not heard on the news any more about the fires over your way, since with the media once they get some news they beat it to death, and nothing else matters. Take good care my friend.Wow @connieflyer that looks like a chemistry lab with those blue coloured tubes.
Enjoy and no going out !
