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Recent content by MacDoktor

  1. MacDoktor

    Weird HeNe lab laser on ebay

    I was just wondering if it was a more complex topology than a "simple" RC filter. It looks like three in series but I wanted to be sure.
  2. MacDoktor

    Weird HeNe lab laser on ebay

    Now I see. The BNC is on the cathode. What kind of filter network is that? (obviously lowpass).
  3. MacDoktor

    Weird HeNe lab laser on ebay

    I see a number of holes on the sides. Perhaps they were used to hold it in place.
  4. MacDoktor

    Weird HeNe lab laser on ebay

    Just curious. It's so weird that I had to ask. You're looking at the "We found something similar" auction. Click on the "View original item" link. I have quite a few HeNe lasers and power supplies. I bought them some years back when the prices on ebay were a bit more reasonable. I have three...
  5. MacDoktor

    Weird HeNe lab laser on ebay

    This is my first thread here (I think) so go easy on me... I'm baffled by this homemade lab laser on ebay: Unknown/Like "HeNe Laser Kit -Box" From College Physics Lab Education Research It looks like a tube with a brewster window which would require an external mirror but I can't figure out...




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