What is acceptable for the drop between TB+ and TP for R/L? Above 19v drop?
I bought my SOHA II here a while ago, went to change tubes, I am getting 15v on both tubes. Changed tubes to the ones that came with it, tested 16v. Did all the other tests before this, everything was in pretty good shape, the worst regulator was off by .2v.
Adjust the tail current (set to 2ma)? Leave it alone? I've been listening to the amp for quite a while before I took these measurements.
Also, my DT880s are pretty quiet but my more sensitive HD25's have a pretty audible noise floor. Is there anything I can do to fix this? It is independent of the pot, which is grounded.
EDIT: After moving them in and out and switching them and whatnot, one tube is dropping 19v, the other is 15v still - they are ebay tubes, what are the implications of this? Also, when I keep testing these, the relay keeps tripping - is that normal?