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Metalworking (rec.crafts.metalworking) Discuss various aspects of working with metal, such as machining, welding, metal joining, screwing, casting, hardening/tempering, blacksmithing/forging, spinning and hammer work, sheet metal work. |
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#41
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Slitting saw usage ?
On Tue, 26 Sep 2017 20:57:23 -0400, "Jim Wilkins"
wrote: "Larry Jaques" wrote in message .. . On Tue, 26 Sep 2017 17:48:46 -0400, "Jim Wilkins" wrote: "Larry Jaques" wrote in message ... On Mon, 25 Sep 2017 07:03:29 -0400, "Jim Wilkins" wrote: "Larry Jaques" wrote in message om... On Sun, 24 Sep 2017 13:26:41 -0400, "Jim Wilkins" wrote: "Larry Jaques" wrote in message Do you have a lightning arrestor at your breaker box? I haven't changed the house wiring, but I unplug a lot of things when I hear distant thunder or radar shows an approaching storm front. We rarely get isolated pop-up thunderstorms. OK. Lightning hit the pole in front of the house once, scaring the $#!+ out of the neighbor working near it. The only damage was to the old carbon arrestor in the phone network interface box. The electric meter and its box and drop are fairly new so I assume they are up to spec. You assume with the people who gave us the Home Irradiator electronic meters and Time of Use fees? Um, OK. Not so much, here. They can read it from the street but it isn't a networked Smart Meter. https://www.altestore.com/static/dat...ta%20Sheet.pdf After I returned from a CA trip to see family last March, I found that I wasn't sleeping normally. A couple days later, when I turned on the faucet for the front watering, I noticed a brand new natural gas regulator and electronic meter on the side of my house. After learning that it had a city-wide range, I built an L-shaped frame and tacked metal screen over it, then fastened it to the meter piping and brounded it to the gas pipe ground wire. It shields the house from the meter. Normal sleep resumed that night. Until then, I had been unsure of the concern over electric meter safety, but the shielded gas meter (much less powerful than the electronic meters from the electric utility companies) proved to me that they can and do affect human bodies in an unhealthy manner. What cued me that something was hinky with the meter/reg replacement is that the girl told me that the batteries in the meters were due for replacement, yet the company spent (hundreds?) considerably more money on a new meter, new regulator, new valve, plus several hours labor rather than changing the battery. Single point grounds don't help much at cellular and WiFi frequencies. Even a gap in a large conductive surface, such as a warped cabinet door, can pass radiation. https://en.wikipedia.org/wiki/Slot_antenna Would that slot antenna work with metal screen over the slot strip, or in place of the slot strip? What can I say? It worked. https://www.lessemf.com/smart.html This led me to it. When I had a nice HP vector network analyzer to test my concoctions sometimes they worked as planned and sometimes I learned another strange quirk of radio propagation. For instance a screen set up to block radio signals may unintentionally become an antenna to transmit them: Yeah, I read a lot about reflection and focus on the EMF boards smart meters a couple years back. http://www.ss-pub.org/wp-content/upl...0140906-02.pdf Hoooee, Pa. Dass all in Greek. I tried a little bug finder and it showed signal at the meter but not behind the screen, so it seems to work. (Not a pro model.) http://tinyurl.com/yaserhjs -- Stoop and you'll be stepped on; stand tall and you'll be shot at. -- Carlos A. Urbizo |
#42
Posted to rec.crafts.metalworking
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Slitting saw usage ?
"Larry Jaques" wrote in message
... On Tue, 26 Sep 2017 20:57:23 -0400, "Jim Wilkins" wrote: "Larry Jaques" wrote in message . .. On Tue, 26 Sep 2017 17:48:46 -0400, "Jim Wilkins" wrote: "Larry Jaques" wrote in message m... On Mon, 25 Sep 2017 07:03:29 -0400, "Jim Wilkins" wrote: "Larry Jaques" wrote in message news:q5vgsch09pvflbcs2vr4liib8ucj8dfe2p@4ax. com... On Sun, 24 Sep 2017 13:26:41 -0400, "Jim Wilkins" wrote: "Larry Jaques" wrote in message Do you have a lightning arrestor at your breaker box? I haven't changed the house wiring, but I unplug a lot of things when I hear distant thunder or radar shows an approaching storm front. We rarely get isolated pop-up thunderstorms. OK. Lightning hit the pole in front of the house once, scaring the $#!+ out of the neighbor working near it. The only damage was to the old carbon arrestor in the phone network interface box. The electric meter and its box and drop are fairly new so I assume they are up to spec. You assume with the people who gave us the Home Irradiator electronic meters and Time of Use fees? Um, OK. Not so much, here. They can read it from the street but it isn't a networked Smart Meter. https://www.altestore.com/static/dat...ta%20Sheet.pdf After I returned from a CA trip to see family last March, I found that I wasn't sleeping normally. A couple days later, when I turned on the faucet for the front watering, I noticed a brand new natural gas regulator and electronic meter on the side of my house. After learning that it had a city-wide range, I built an L-shaped frame and tacked metal screen over it, then fastened it to the meter piping and brounded it to the gas pipe ground wire. It shields the house from the meter. Normal sleep resumed that night. Until then, I had been unsure of the concern over electric meter safety, but the shielded gas meter (much less powerful than the electronic meters from the electric utility companies) proved to me that they can and do affect human bodies in an unhealthy manner. What cued me that something was hinky with the meter/reg replacement is that the girl told me that the batteries in the meters were due for replacement, yet the company spent (hundreds?) considerably more money on a new meter, new regulator, new valve, plus several hours labor rather than changing the battery. Single point grounds don't help much at cellular and WiFi frequencies. Even a gap in a large conductive surface, such as a warped cabinet door, can pass radiation. https://en.wikipedia.org/wiki/Slot_antenna Would that slot antenna work with metal screen over the slot strip, or in place of the slot strip? What can I say? It worked. https://www.lessemf.com/smart.html This led me to it. When I had a nice HP vector network analyzer to test my concoctions sometimes they worked as planned and sometimes I learned another strange quirk of radio propagation. For instance a screen set up to block radio signals may unintentionally become an antenna to transmit them: Yeah, I read a lot about reflection and focus on the EMF boards smart meters a couple years back. http://www.ss-pub.org/wp-content/upl...0140906-02.pdf Hoooee, Pa. Dass all in Greek. I tried a little bug finder and it showed signal at the meter but not behind the screen, so it seems to work. (Not a pro model.) http://tinyurl.com/yaserhjs Yes, measuring it is the right idea. I've been involved in FCC Class B compliance testing. We did what we thought was right but the only proof was field strength measurement. It was a lot like fixing leaky plumbing. https://en.wikipedia.org/wiki/Title_47_CFR_Part_15 -jsw |
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