I have had tubes drift for awhile when they were new. I'm using Shuguang Treasures now and they also had some drift. After about 100 hours they settled in and have been solid since. As Newbee said try putting them in the other side and see if they do they same thing in the other side. If they are only moving a little they will probably settle in and be fine.
Gold Lions KT88 on Sonic Frontiers Power SE
I changed the old KT88 on my Power 2 SE with 8 Gold Lion quartet matched.
Now is only 30 hours that the tubes play,but I noted that sametimes the right channel tubes don't keep the bias .
I have to control the bias ,and adjust it every time or I have to wait the break-in period end ,to have a regular adjust ,or there is some problem?
Now is only 30 hours that the tubes play,but I noted that sametimes the right channel tubes don't keep the bias .
I have to control the bias ,and adjust it every time or I have to wait the break-in period end ,to have a regular adjust ,or there is some problem?