Most of the time the requirement is for listing by a "Nationally Recognized Testing Laboratory" of which UL is but one. For instance Los Angeles county requires that any electrical equipment sold be
Excellent.. How did you find that page? I searched "497" on their site and got just fiber optics. They have a page dedicated to them, but the associated PDF is probably easier to work with: https
Enlarging on this a bit - They are all examples of charging by particles hitting or coming near something. Whether it's wind blown dust, snow, or ice, or raindrops, etc. And whether the charge got
FWIW This is where a lot of the confusion about "charge dissipators" (porcupines, for example) for lighting reduction comes from. This is an excellent explanation, Jim. I was hoping you would c
The idea being that you're feeding with 120 ohm twisted pair rather than 75 ohm coax? I have been expanding my RX system to include more Beverages fed with CAT6 rather than RG-6. In this video I de