- Joined
- Dec 31, 2012
- Messages
- 904
- Points
- 0
I bought an older (sealed) HeNe from eBay hoping she might lase. I hooked her up to a PSU and I see no output. Not even plasma glow. :yabbem: Poopy.
The funny thing is, when I unplug her, I’ve been shocked by the exposed HV connections at the Alden connector - several times in the last few days.
I know very well the capacitors within a recently charged PSU can zap you. That’s why you see them protected by the female Alden connector in most cases. But from the laser head, I can’t recall ever being zapped – and I’ve handled a good number.
Under what conditions will a HeNe tube hold a charge like that?
The funny thing is, when I unplug her, I’ve been shocked by the exposed HV connections at the Alden connector - several times in the last few days.
I know very well the capacitors within a recently charged PSU can zap you. That’s why you see them protected by the female Alden connector in most cases. But from the laser head, I can’t recall ever being zapped – and I’ve handled a good number.
Under what conditions will a HeNe tube hold a charge like that?