I'm hunting down the original source of the recommendation on lightning grounds not having sharp bends. Sort of like the origin of 468... _______________________________________________ _____________
the original source might say that, but it's not actually true. Until you get a full 360 loop, the inductance of a bend isn't much more than the inductance of the length of wire in the bend. if you t
If i had to guess i would start looking at old installation instructions for lightning rod installation. Did anyone make a do-it-yourself lightning rod kit? maybe an old Sears catalog or farm supply
I'm fairly certain that some of the earliest telegraph lines were curved rather than bent because there was a belief the signals would go straight if the turn was too sharp. Barry, W5GN the original
yeah.. I'm actually looking for Franklin's instructions: after all, he's the guy who popularized it, if not invented it. An interesting point. Back then, the conductor (if it was even a wire) would l
that's interesting.. do recall where you might have seen that? In the 19th century and even well into the 20th, there were a lot of physical analogies used to understand Electricity and Magnetism. Yo
How come few houses of modern construction have lightning rods if they were such an important invention? _______________________________________________ ______________________________________________
Google Curved Telegraph Lines, and the Google Book Review of "The Telegrapher", will provide one proof that the theory was under discussion, in the first few paragraphs of that letter to the Editor d
I agree with your reasoning discounting the magnetic coupling effects of a bend. I always assumed that your item 2) was the reason for that recommendation, but intuitively it always seemed to me that
you have to remember that its not just the impedance, its the travel time to ground compared to the risetime of the lightning stroke. So if there is a bend that isn't too far from some other structur
Virtually all industrial installations have them on all buildings and distillation towers. Where I worked *all* the buildings (except single story offices) including new construction had them. There'
Money? Fire insurance didn't really exist back in the 19th century, so a lightning caused fire was a catastrophic event, financially. Today, given that the odds of any one house being hit are fairly
The last house I saw with lightning rods was the one I was raised in. It had the old (bout 4 or 5' tall) rods with the glass ball in the middle. They were tied together with about a one ought woven c