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  • Users: markls8
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  1. markls8

    Garage door opener antenna problem.

    Is there a way to attach a lead to the in-garage receiver antenna so that it can be moved about 9 feet so as to pass through a brick wall? My range is very poor and the installer says he can't do anything about the poor signal penetration through a brick wall. I figure I may be able to fashion...
  2. markls8

    Halogen bulb watts/lumen efficiency paradox?

    Halogen bulbs are considered more efficient than regular incandescents because the tungsten filament burns hotter and puts out more light. But to me, it seems that a bulb that burns cooler will be more efficient because it is producing less heat and thus more of its electrical energy is going to...
  3. markls8

    reinforced pan-poured raised deck - beam sag

    I've just had a Stampcrete raised deck installed on my house using "I" beams and a corrugated-type galvanized steel pan. One area spans 24'-9", and the supporting beam (W6X20) has deflected down about 1" (maybe more, haven't been up there to measure it yet) under the weight...
  4. markls8

    Electrolysis of water

    Sorry, but it's been a while since high school chemistry -How much pressure (hydrogen and oxygen) could I expect to develop in a closed two part vessel if I applied, say 24V to water? (assume continous water supply to reach equilibrium) How much would that pressure increase if I increased V...

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