Thanks Jim
And this is why I am so confused. It would seem that the tubes are clearly the issue but 3 pairs of 300B tubes? And of course I did not want to buy another pair in the hopes all would be well. I was hoping that there was an obvious technical issue that would explain the problem. But? They did bias and hold steady prior to displaying this problem. This issue has occured in 2 seperate homes, I just moved. Plugged directly into wall or conditioner, with 3 different set of 300B tubes and of course every other OCD audiofool thing I can think of. And the bias problem is strange as it is actually difficult to get it to set to target 83mva but can get close then will drift drastically up or down depending on which way the bias was being adjusted.
And this is why I am so confused. It would seem that the tubes are clearly the issue but 3 pairs of 300B tubes? And of course I did not want to buy another pair in the hopes all would be well. I was hoping that there was an obvious technical issue that would explain the problem. But? They did bias and hold steady prior to displaying this problem. This issue has occured in 2 seperate homes, I just moved. Plugged directly into wall or conditioner, with 3 different set of 300B tubes and of course every other OCD audiofool thing I can think of. And the bias problem is strange as it is actually difficult to get it to set to target 83mva but can get close then will drift drastically up or down depending on which way the bias was being adjusted.