On Apr 4, 2024, at 22:18 , Adam R. Maxwell via groups.io <amaxwell@...> wrote:
I assume the (much!) slower transistor worked at some point in the low serial number unit, but Tek must have had a reason for that change. I've grown a bit less optimistic that NOS 151-0220-00 transistors will be the silver bullet, though.
Indeed, a pair of NOS 151-0220-00 transistors in Q309/Q317 did not fix the problem. I'm curious to see if the faster transistors I've ordered will do the trick, although if so I suspect it would just be papering over problems with some other marginal component(s).
thanks,
Adam
