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#11
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In article ,
dxAce wrote: m II wrote: dxAce wrote: m II wrote: Telamon wrote: Never take technical advice from an idiot. or abuse from an alcoholic Om Shanti Om dxAce Michigan USA Proud to be Miami and a blood relative of Abraham Lincoln So? The ninety nine percent asshole portion makes the point moot, you drunk. And you, 100% dumbass Canuck! No, he is only 50% dumbass Canuck. The other 50% is Labatt's doing the talking. -- Telamon Ventura, California |
#12
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In article oLMOj.841$XI1.821@edtnps91, m II wrote:
dxAce wrote: Proud to be Miami and a blood relative of Abraham Lincoln So? The ninety nine percent asshole portion makes the point moot, you drunk. And you, 100% dumbass Canuck! You dropped something, drunk..... SNIP Being drunk and hung over is your problem so stop projecting. -- Telamon Ventura, California |
#13
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On Sat, 19 Apr 2008 11:40:49 -0700 (PDT), RHF
wrote: -IF- You can 'find' the Metal Cold Water Pipe that is coming into the House : Usually Outside the Foundation somewhere around the front ot side of the House. Hint - There is all ready a Ground Clamp attached there. IIRC - This Water Service Pipe is usually 1 1/2" in Diameter -IF- The Pipe is Plastic : It can NOT be used as a Ground. -IF- The Pipe is Steel/Iron {Test with a Magnet} : It can be used as a Ground. Clean the Outer Surface of the Pipe with in a Few Inches of the Ground. Use a Brase Ground Clamp around the Pipe -IF- This Pipe is Copper -Caution- Use the Right Clamp. You forgot one: -IF- There is a thunderstorm and you have done this, run for the hills, and pray that lightning doesn't strike a fire hydrant down the street from you, so that you might actually have a home to return to after the storm has passed. Cold water pipes make poor grounds in most cases. Electrical service joints also make poor grounds, and it's for the same reasons - the leads are too long and the wire size is too small. That's before you even begin to consider that the integrity of the ground connection is often compromised by age, poor initial installation, corrosion, dissimilar metal conversion, loose screws, etc. Remember that whatever you use for a ground becomes part of the antenna structure. Using a cold water pipe for a ground virtually guarantees that you are going to suck in a ton of ground-level radiation in the form of RF noise - and should you ever transmit on an antenna that's grounded to a cold water pipe, you're certain to cause interference to other services or neighbors. The Phone Company ground at the network interface) is not a good choice either. It may not even be attached to anything. For what it's worth, the National Electrical Code NFPA 70-2002, Section 250.130(C) does not permit the equipment grounding conductor of a nongrounding receptacle or branch circuit extension to be connected to a cold-water pipe, and prohibits using interior metal water piping more than 5 feet from the point of entrance to a building as part of the grounding electrode system. The use of water pipes as an equipment grounding conductor also violates OSHA 1910.303(a), as they are not listed for this purpose by nationally recognized testing laboratories such as UL. Don't screw around with shortcuts. Make the effort to construct a good RF ground. in the long run, you'll be glad you did. 73 DE KC2HMZ |
#14
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On Apr 23, 3:51*am, John Kasupski wrote:
On Sat, 19 Apr 2008 11:40:49 -0700 (PDT), RHF wrote: -IF- You can 'find' the Metal Cold Water Pipe that is coming into the House : Usually Outside the Foundation somewhere around the front ot side of the House. Hint - There is all ready a Ground Clamp attached there. IIRC - This Water Service Pipe is usually 1 1/2" in Diameter -IF- The Pipe is Plastic : It can NOT be used as a Ground. -IF- The Pipe is Steel/Iron {Test with a Magnet} : It can be used as a Ground. *Clean the Outer Surface of the Pipe with in a Few Inches of the Ground. Use a Brase Ground Clamp around the Pipe -IF- This Pipe is Copper -Caution- Use the Right Clamp. You forgot one: -IF- There is a thunderstorm and you have done this, run for the hills, and pray that lightning doesn't strike a fire hydrant down the street from you, so that you might actually have a home to return to after the storm has passed. Cold water pipes make poor grounds in most cases. Electrical service joints also make poor grounds, and it's for the same reasons - the leads are too long and the wire size is too small. That's before you even begin to consider that the integrity of the ground connection is often compromised by age, poor initial installation, corrosion, dissimilar metal conversion, loose screws, etc. Remember that whatever you use for a ground becomes part of the antenna structure. Using a cold water pipe for a ground virtually guarantees that you are going to suck in a ton of ground-level radiation in the form of RF noise - and should you ever transmit on an antenna that's grounded to a cold water pipe, you're certain to cause interference to other services or neighbors. The Phone Company ground at the network interface) is not a good choice either. It may not even be attached to anything. For what it's worth, the National Electrical Code NFPA 70-2002, Section 250.130(C) does not permit the equipment grounding conductor of a nongrounding receptacle or branch circuit extension to be connected to a cold-water pipe, and prohibits using interior metal water piping more than 5 feet from the point of entrance to a building as part of the grounding electrode system. The use of water pipes as an equipment grounding conductor also violates OSHA 1910.303(a), as they are not listed for this purpose by nationally recognized testing laboratories such as UL. Don't screw around with shortcuts. Make the effort to construct a good RF ground. in the long run, you'll be glad you did. 73 DE KC2HMZ- Hide quoted text - - Show quoted text - JK - Good Advise ~ RHF It is best not to Think of the Antenna and the Ground as two separate things -but- as the Antenna-&-Ground System. A Chain of Items forming a Complete Low Resistance Path -from- Antenna-in-the-Air -to- Ground-Rod-in-the-Ground. The Eight Foot Copper-Clad Steel Ground Rod is not the last Link in the System : The Ground {Soil} itself is. The amount of Surface Area and it's Effectiveness between the Ground Rod and the Ground {Soil} is every bit as important as the Size (Length Thicknees) of the Ground Wire-Strap. |
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