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Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
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#1
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Ham radio grounding question
I am so confused about how to properly ground a system. I will have a
two meter and a 440 on the roof of my house. I will run the coax down to my sofit vents or whatever they are called and run the coax inside the vents to my shack. Behind the wall where my rquipment will be is a storage space that I can acess. (This is a finished attic). I will be using a mobile radio that has two antenna outputs, one for 2 meter and one for 440. How do I ground the radio and does it need it? Should the coax itself be grounded and how? Do I have to purchase one of those surge things that screws into the coax? Any advice is appreciated! |
#2
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wrote in message ups.com... I am so confused about how to properly ground a system. I will have a two meter and a 440 on the roof of my house. I will run the coax down to my sofit vents or whatever they are called and run the coax inside the vents to my shack. Behind the wall where my rquipment will be is a storage space that I can acess. (This is a finished attic). I will be using a mobile radio that has two antenna outputs, one for 2 meter and one for 440. How do I ground the radio and does it need it? Should the coax itself be grounded and how? Do I have to purchase one of those surge things that screws into the coax? The major issue is to ground the metal mast that the antennas are mounted on. This should be done with large gage wire and the wire should run as straight to ground as possible and be located outside the structure of the house. The ground itself is often several copper-plated steel rods driven into the earth (they sell the stuff you need at electrical supply concerns). How many ground rods depends on the conductivity of your soil. |
#3
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Srtyped:
The ARRL Amateur Radio Handbook, the ARRL Antenna Book and the ARRL VHF Manual have a plethora of articles and many pages devoted to this very subject.. The books have been around for years so any edition from any available year will suffice. Check them out at your local public library and continue to be concerned about how to do the job correctly for fire and safety reasons as well as proper efficient operation of your equipment and antennas.. -- Best Regards, Daniel Sofie Electronics Supply & Repair - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - wrote in message ups.com... I am so confused about how to properly ground a system. I will have a two meter and a 440 on the roof of my house. I will run the coax down to my sofit vents or whatever they are called and run the coax inside the vents to my shack. Behind the wall where my rquipment will be is a storage space that I can acess. (This is a finished attic). I will be using a mobile radio that has two antenna outputs, one for 2 meter and one for 440. How do I ground the radio and does it need it? Should the coax itself be grounded and how? Do I have to purchase one of those surge things that screws into the coax? Any advice is appreciated! |
#4
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sofie wrote: Srtyped: The ARRL Amateur Radio Handbook, the ARRL Antenna Book and the ARRL VHF Manual have a plethora of articles and many pages devoted to this very subject.. The books have been around for years so any edition from any available year will suffice. Check them out at your local public library and continue to be concerned about how to do the job correctly for fire and safety reasons as well as proper efficient operation of your equipment and antennas.. -- Best Regards, Daniel Sofie Electronics Supply & Repair - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - wrote in message ups.com... I am so confused about how to properly ground a system. I will have a two meter and a 440 on the roof of my house. I will run the coax down to my sofit vents or whatever they are called and run the coax inside the vents to my shack. Behind the wall where my rquipment will be is a storage space that I can acess. (This is a finished attic). I will be using a mobile radio that has two antenna outputs, one for 2 meter and one for 440. How do I ground the radio and does it need it? Should the coax itself be grounded and how? Do I have to purchase one of those surge things that screws into the coax? Any advice is appreciated! What if the antenna is insulated form the mast? What about the coax? |
#5
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stryped:
As the books I mentioned will advise you...... use an "in-line" coax lightning arrester.... fairly inexpensive to buy or you can make one.... details in the books. If you have not read through any of these ARRL publications I would advise you to do so.... lots of helpful and useful information that will answer most of your questions now and in the future... any active Ham should have these on his bookshelf. -- Best Regards, Daniel Sofie Electronics Supply & Repair - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - wrote in message What if the antenna is insulated form the mast? What about the coax? |
#6
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I would strongly suggest you get the book that Sofie suggested. The ARRL
Antenna Hand Book will have all of this information. This would be a detailed instruction set to put up in a newsgroup email. There is available hardware, and techniques to accomplish what is required. There are millions of antennas put up all over the world, and they are properly grounded, and working safely. One thing for sure, if the antenna is not properly grounded, it is susceptible to be a safety hazard from a lightning strike, and electrostatic pickup, thus discharging in to your set, and home. -- Jerry G. ===== wrote in message oups.com... sofie wrote: Srtyped: The ARRL Amateur Radio Handbook, the ARRL Antenna Book and the ARRL VHF Manual have a plethora of articles and many pages devoted to this very subject.. The books have been around for years so any edition from any available year will suffice. Check them out at your local public library and continue to be concerned about how to do the job correctly for fire and safety reasons as well as proper efficient operation of your equipment and antennas.. -- Best Regards, Daniel Sofie Electronics Supply & Repair - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - wrote in message ups.com... I am so confused about how to properly ground a system. I will have a two meter and a 440 on the roof of my house. I will run the coax down to my sofit vents or whatever they are called and run the coax inside the vents to my shack. Behind the wall where my rquipment will be is a storage space that I can acess. (This is a finished attic). I will be using a mobile radio that has two antenna outputs, one for 2 meter and one for 440. How do I ground the radio and does it need it? Should the coax itself be grounded and how? Do I have to purchase one of those surge things that screws into the coax? Any advice is appreciated! What if the antenna is insulated form the mast? What about the coax? |
#7
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Protection is defined by the figure in
http://www.erico.com/erico_public/pd...es/Tncr002.pdf Antenna has its own earth ground. Antenna earth ground connects to the building earth ground. Antenna wire must enter at the service entrance and first make a connection direct (and less than 10 feet) to the single point ground also used by AC electric, telephone 'whole house' protector, and cable. Also notice even buried cables can carry a destructive transient inside the building if not earthed at the service entrance. Earthing is accomplished by direct wire connection (ie ground block sold even in Radio Shack and Home Depot) for coax cables AND through a surge protector for wires that cannot be earthed directly (ie AC electric and phone). wrote: I am so confused about how to properly ground a system. I will have a two meter and a 440 on the roof of my house. I will run the coax down to my sofit vents or whatever they are called and run the coax inside the vents to my shack. Behind the wall where my rquipment will be is a storage space that I can acess. (This is a finished attic). I will be using a mobile radio that has two antenna outputs, one for 2 meter and one for 440. How do I ground the radio and does it need it? Should the coax itself be grounded and how? Do I have to purchase one of those surge things that screws into the coax? Any advice is appreciated! |
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