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Amateur Radio Antennas - For discussion of all amateur band designed antennas and related accoutrements. This includes base, handheld, mobile and repeater usage. For commercial antennas on the amateur bands please use Commercial Radio Antennas below.

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Old 10-11-2018, 11:16 AM
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Default Dipole on roof

I just made a fan dipole with 40m and 20m. I am totally out of options other than put it on top of the roof, but Ive read not to let the wires touch directly on the roof. What does Home Depot or Lowes offer as some type of insulator that I can put between the roof and wires. And if anyone has done this was it descent?
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Old 10-11-2018, 11:38 AM
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If the wire is insulated there is really nothing else you could add to improve things. Even with bare wire on a typical asphalt shingle roof is probably not a big difference between insulated and bare wire. Besides the antenna being close to internal house wiring, air conditioning ducting, etc, when it rains the roof will change properties for the worst for antennas.

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Originally Posted by wx5atx1 View Post
I just made a fan dipole with 40m and 20m. I am totally out of options other than put it on top of the roof, but Ive read not to let the wires touch directly on the roof. What does Home Depot or Lowes offer as some type of insulator that I can put between the roof and wires. And if anyone has done this was it descent?
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Old 10-11-2018, 12:54 PM
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Originally Posted by wx5atx1 View Post
<snip> I am totally out of options other than put it on top of the roof, but I’ve read not to let the wires touch directly on the roof. <snip>
Do you mean having the whole fan dipole lay on the roof? I've had a 20 meter dipole strung just above the roof's apex with masts at each end of a ranch house. The antenna was strung tight so it did not touch the roof. Perhaps you are trying to build a stealth antenna? Could you explain your objective a little more? Thanks!

<edit> If the 40 meter dipole was tight and the 20 meter dipole drooped under that, can you keep it off the roof?

Cheers! Dave K4EET
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Last edited by K4EET; 10-11-2018 at 12:57 PM.. Reason: Added a question...
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Old 10-11-2018, 12:57 PM
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Yes that is correct just lay on the roof. I have no trees around me and I live in an hoa. So yes I’m trying to make it stealth
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Old 10-11-2018, 1:55 PM
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Originally Posted by wx5atx1 View Post
Yes that is correct just lay on the roof. I have no trees around me and I live in an hoa. So yes Im trying to make it stealth
That is what I thought. Well, it should be somewhat OK as long as the wires do not touch each other. What I would do if I were you would be to put the antenna in the attic. Is that possible? I've done that before and know other hams in HOA restricted areas that have their antennas in the attic. How long is your attic; end to end?

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Old 10-11-2018, 2:08 PM
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I’ve thought about that as well but I have vaulted ceilings in almost every room and space is very limited. There is 2 small attics in my house
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Old 10-11-2018, 3:39 PM
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wx5atx1,

Can you do something like this?



Let me know if you have a path through the attic like that.

73, Dave K4EET
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Old 10-11-2018, 3:55 PM
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Dave, REALLY cool idea.
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Old 10-11-2018, 3:59 PM
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Dave, REALLY cool idea.
If his attic is connected like that... Dave
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