Quote:
Originally Posted by mr_rye89
Well I feel dumb. I found another 3BU8 (agc keying/sync sep/noise limiter) in my tube stash and swapped it in and the picture is back. I woulda tried this earlier but I hate throwing tubes at a TV set.
The tube tested ok in my tester, but it was slow to get into the green zone  |
Sometimes tube substitution is a better approach than testing...I had a CTC-15 clone that had low HV and sweep issues. That set I tested all the tubes, nearly drove myself nuts checking all the passive parts a couple of times, then had it spring to life when I subbed all the sweep tubes from another working CTC-15 clone. Once I narrowed it down I retested the tube and found it still tested good...Buuut if I held down the test button for nearly a full minute it would slump into the bad end of the scale.
