Quote:
Originally Posted by Station X
123456789 Pins.
641237410 Settings 1
741236410 Settings 2
Only the anodes pins 1 and 6 have seperate test leads A1 and A2,
|
On my AVO Flat Panel:
641237410 results in one triode section (A) testing good and the other (A2) testing bad.
741236410 results in both triode sections being good.
On my 'Dynamic gm Tester', one side is good and the other bad - consistently from one E88CC to the next. With a gm value of 12 or so, it seems to me that the problem is instability in both testers.
I think the strange Vg = +9V has also been explained away, so I think I shall now turn my attention to a very dead HRO that has been patiently waiting since arrival here.
Many thanks
Peter G3PIJ