For some reason, the lower contact pair of Y leaves will *not* make contact. They appear to be making contact visually, but it's open circuit every time. I've tried shaving down a toothpick and cleaning the inside contact areas with ethanol but it's made NO difference at all. If I jiggle them, I can get them to make electrical contact, but then it's lost again a moment later. Never experienced this before! Could this explain why this attenuator is permanently stuck 'on' once actuated?
Jinxie