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Posted: 12/27/2021 10:52:43 AM EDT
[#1]
Yes, you absolutely, positively need to ground that pipe. Right now all you have is an ungrounded lightning rod.
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Posted: 12/27/2021 11:10:44 AM EDT
[#2]
You may have issues with that much mast unguyed above the roof, too. Usually the rule of thumb is 10' between guy levels.
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Posted: 12/27/2021 11:39:13 AM EDT
[#3]
radial ground
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Posted: 12/27/2021 2:37:49 PM EDT
[#4]
Quote HistoryQuoted: You may have issues with that much mast unguyed above the roof, too. Usually the rule of thumb is 10' between guy levels. If it works better than the current setup I will be installing a couple of spring loaded guy wires to help stabilize it. The dipole has very little wind resistance and the conduit is attached to the house at two locations. |
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Posted: 1/25/2022 11:37:52 PM EDT
[#5]
What size conduit are you using? I *assume* it's galvanized to prevent rust?
Also what are you using to mount the mast to the house? Thanks, |
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Posted: 1/27/2022 11:22:03 PM EDT
[#6]
Quote HistoryQuoted: What size conduit are you using? I *assume* it's galvanized to prevent rust? Also what are you using to mount the mast to the house? Thanks, 1" IMC. It's mounted to the lower roof with a roof mount plate and attached to the fascia of the upper roof, about 4' above the lower roof. Not ideal but if I add four guy wires it will do okay. And if it fails and puts a hole in my roof I file a claim for a new roof ;) |
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Posted: 1/28/2022 1:49:00 PM EDT
[#7]
Quote HistoryQuoted: 1" IMC. It's mounted to the lower roof with a roof mount plate and attached to the fascia of the upper roof, about 4' above the lower roof. Not ideal but if I add four guy wires it will do okay. And if it fails and puts a hole in my roof I file a claim for a new roof ;) Quote HistoryQuoted: Quoted: What size conduit are you using? I *assume* it's galvanized to prevent rust? Also what are you using to mount the mast to the house? Thanks, 1" IMC. It's mounted to the lower roof with a roof mount plate and attached to the fascia of the upper roof, about 4' above the lower roof. Not ideal but if I add four guy wires it will do okay. And if it fails and puts a hole in my roof I file a claim for a new roof ;) |
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Posted: 1/28/2022 5:48:13 PM EDT
[#8]
Definitely ground it, and makes sure the ground rod is tied to the house service ground.
A neaby lightning strike dissapating though the ground can cause several thousand volts potential difference between the two systems if this isn't done. Lightning is nothing to screw around with. This book should be in every ham shack: LINK |
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Posted: 1/30/2022 9:24:39 AM EDT
[#9]
Quote HistoryQuoted: Definitely ground it, and makes sure the ground rod is tied to the house service ground. A neaby lightning strike dissapating though the ground can cause several thousand volts potential difference between the two systems if this isn't done. Lightning is nothing to screw around with. This book should be in every ham shack: LINK Unfortunately the ground rods are on opposite sides of the house |
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Posted: 1/30/2022 9:42:19 AM EDT
[#10]
Quote HistoryQuoted: Unfortunately the ground rods are on opposite sides of the house I'm in that same situation, plus the ground wire looks to come out the wall about 8-12" high, then make a 45/elbow and goes down through the concrete, of the driveway, then there are several feet of concrete in each direction... I gotta do some more invistigating.... |
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Posted: 1/30/2022 12:20:37 PM EDT
[#11]
Lots of good information in this post on QRZ:
https://forums.qrz.com/index.php?threads/resources-for-antenna-and-station-grounding.756419/ House ground layout with pics and discussion of Poor, Better, Best configurations for homes with opposite sided ground rods: http://www.w8ji.com/house_ground_layouts.htm The Best version:  Pretty involved and detailed view of lightning protection. Most hams don't (or won't) go to this level, but it's important to note the details and follow the principles and techniques as best you can: https://lightning.org/lightning-protection-overview/ Good luck! |
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