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Doug Smith W9WI wrote:
- You'll drive yourself batty trying to figure out why lightning does what it does. - Might there have been *two* strikes? The one that hit your antenna & damaged the Hi-Z input, and *another* one that hit the power lines & damaged the other equipment? - Even if there was only one, that strike on the antenna would have induced some pretty high voltages on the AC line, which could have caused the damage to the other gear. - Around here you can pretty much assume there will be at least one thunderstorm within 100 miles of Nashville on any given summer day. From about early April through about late September, I leave my antennas disconnected when not in use. Hey Doug, I checked out your web site. Fascinating stuff especially the F2 skip recording from 1938 of the BBC, captured in N.Y. I managed a signal while in N.C. (near Cherokee) from a station in Kitchener, Ontario back in the 70's. This is a good time of year for that stuff too. Bill KC9CS |
"Dr. Artaud" wrote in
. 97.142: One huge collective thanks for all those that responded to this thread. I have read all the responses, and I appreciate the time that each of you have taken to respond. For the time being, I am going to use a white wire antenna draped around the very edge of wall where it meets the ceiling, tucked into the crevice, so that in the future it mat be painted over and lost in the confusion of all the other imperfections of our 100 year old house (believe me, it's old in the poor sense, not the classic "drink with your pinky in the air" sense). That should provide about 45 feet of wire, going, of course, in different directions. Will the orientation of the wire be an issue, or is it, in the Freudian sense, better for the antenna to be longer? ************************* * X * * * * * * * * * * * ***** ***** * Window * ***************** If by any chance this comes through correctly, the X = the radio. I will start there, go towards the window, and loop back eventually almost to the radio again just above it. The window protrudes over the roof slightly, that is why it is drawn offset. Any suggestions on why or why not this will work or not would be appreciated. Thanks again all! Dr. Artaud |
Dr. Artaud wrote:
"Dr. Artaud" wrote in . 97.142: One huge collective thanks for all those that responded to this thread. I have read all the responses, and I appreciate the time that each of you have taken to respond. For the time being, I am going to use a white wire antenna draped around the very edge of wall where it meets the ceiling, tucked into the crevice, so that in the future it mat be painted over and lost in the confusion of all the other imperfections of our 100 year old house (believe me, it's old in the poor sense, not the classic "drink with your pinky in the air" sense). That should provide about 45 feet of wire, going, of course, in different directions. Will the orientation of the wire be an issue, or is it, in the Freudian sense, better for the antenna to be longer? ************************* * X * * * * * * * * * * * ***** ***** * Window * ***************** If by any chance this comes through correctly, the X = the radio. I will start there, go towards the window, and loop back eventually almost to the radio again just above it. The window protrudes over the roof slightly, that is why it is drawn offset. Any suggestions on why or why not this will work or not would be appreciated. Thanks again all! Dr. Artaud In your drawing, it looks as if the wire will nearly loop around the entire room. Not a "loop" antenna in the strictest terms, but a random length wire in all directions. It should favor no particular direction, but you'll have at least a sizeable piece of wire up. It should work okay. If you've a very old house and it happens to have steam radiators you could make a connection to the pipe as well...more metal to collect signal. Bill KC9CS |
A few days ago,I read on the internet where lightning zapped a 9 year
old girl's mattress and set it on fire in Kansas.There was some metal things on the wall in her bedroom and the lightning was hunting for the metal.It can do the same thing to antenna wire in a room too. cuhulin |
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"B. Otten" wrote in
: That is correct, that is what concerned me, that fact that it will have orientation in all directions. The radio works quite well with the 15 ft. stub that remains of the original antenna, it has been cut off outside the window. I would like to return to the outdoor wire antenna, but only after I can ground my equipment properly. I also need to redo the ground rod and connections, and purchase an arrestor that may be more successful in shedding the voltage of the strike/near strike successfully. I will also run the antenna on the other side of the yard, and terminate it well short of the tree, as the strike rode down the outside of the tree to the wire. I still don't know if it was a coincidence that I just put the arrestor on the wire 3 weeks ago, and that it may have saved my house, or if the presence of the arrestor is responsible for a "leader" climbing the tree and connecting with the bolt of lightning, encouraging it to the arrestor's ground. Regards, Dr. Artaud In your drawing, it looks as if the wire will nearly loop around the entire room. Not a "loop" antenna in the strictest terms, but a random length wire in all directions. It should favor no particular direction, but you'll have at least a sizeable piece of wire up. It should work okay. If you've a very old house and it happens to have steam radiators you could make a connection to the pipe as well...more metal to collect signal. Bill KC9CS |
Michael A. Terrell wrote:
there is one device which can be used on, at least, a receiving antenna with possibly the best protection which can be had, it is called a "coherer" google with coherer and "lightning protection" (yes, include the quotes) and you will see it has been deployed as such however, using it with a transmitter would probably NOT work, since the xmit signal would "set" the coherer and cause a direct short to ground a homemade coherer can be made with a couple of electrodes, metal filings and a plastic or glass tube and stoppers at the ends for the electrodes to enter through and both be within the medium of the metal filings, again, a web search should provide you with a visual diagram to construct one with ------------------ Thanks for the interesting search topic. I had no idea that""coherer" had any modern useage. I think I will stick with my PolyPhaser but I love finding out about new (or old) technologies. Terry |
wrote:
Michael A. Terrell wrote: there is one device which can be used on, at least, a receiving antenna with possibly the best protection which can be had, it is called a "coherer" google with coherer and "lightning protection" (yes, include the quotes) and you will see it has been deployed as such however, using it with a transmitter would probably NOT work, since the xmit signal would "set" the coherer and cause a direct short to ground a homemade coherer can be made with a couple of electrodes, metal filings and a plastic or glass tube and stoppers at the ends for the electrodes to enter through and both be within the medium of the metal filings, again, a web search should provide you with a visual diagram to construct one with ------------------ Thanks for the interesting search topic. I had no idea that""coherer" had any modern useage. I think I will stick with my PolyPhaser but I love finding out about new (or old) technologies. Terry You replied to a faked messge, written by a complete idiot. Check the headers. -- http://home.earthlink.net/~computersforvets/ Michael A. Terrell Central Florida |
Michael A. Terrell
You replied to a faked messge, written by a complete idiot. Check the headers. -- http://home.earthlink.net/~computersforvets/ Michael A. Terrell Central Florida ------------------------------- Sorry I didn't bother the check the header, I didn't know the children were acting up again. Some of the links sure appear to be interesing at first glance. Terry |
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