Any problem with mounting a Yagi this way?

[JoshuaHufford]

I need to find a permanent location to mount a yagi antenna outside my house. I didn't want to mount it on my roof if I could avoid it as I have a hip roof so that would require drilling into the roof and I'm not crazy about doing that. I also wanted to keep the coax run as short as possible to avoid signal loss and cost for the coax, I'm trying to receive a signal at 941 MHz and it isn't very strong to begin with so this will be important.

I made a temp setup with a battery for the radio and portable speaker and discovered that this location under my carport worked pretty well, so I made a temporary setup to try it for a few days before I decided as this spot for a permanent location. Here is a picture, not the best quality, the snow and bright sun was really messing with my phone but I think you can get the idea.

https://farm8.staticflickr.com/7810/47271991421_8f78be560b_h.jpg

What I'm thinking is buying a pipe flange like this,

https://images.homedepot-static.com...827d99/svn/vpc-flanges-16-521-604-64_1000.jpg

Then screw that to the under side of the roof overhang, (there is solid plywood behind the white metal), thread in a piece of 3/4" pipe, then have a mast to mount the antenna on. Then I'm going to buy a weatherproof box to mount the receiver, preamp, and power supply into the location where you can see the receiver now. Both the receiver and preamp can handle temps from -40C to 60C, I'll just need to find a 12v power supply that can do the same, they will always be in the shade as well.

So any problems with this idea?

Will the antenna need to be isolated from the mast (pipe)?

How far should I drop the antenna down below the metal to avoid any interference? I'd like to keep it as high as possible but don't want to have anything impacting reception.

I'm going to bring the signal into the house with a long audio cable.

Thanks!

 

[iMONITOR]

I'd be concerned with condensation/humidity forming inside the enclosure, as well as overheating.

 

[JoshuaHufford]

I had planned on venting the enclosure, the small amount of heat generated by the power supply and receiver should keep the air above the dewpoint. The components are rated for 60C, I don't see how it will ever get that warm in there.

 

[trentbob]

Keep it simple and don't overthink it.

 

[k9wkj]

ohhh your neighbor has a spiffy looking XJ!!

 

[Fowler]

The metal in the overhang will cause some reflection on the yagi, but if its working OK in an RX mode only you can leave it alone. The metal mounting pole will act as a reflector but yagis are mounted to metal poles a lot with no problems.
If you have access to an antenna analyzer I'd throw it on and look at the results. Moving it further away from the metal overhang might offer some improvement.
Can you mount it on the facia where the overhang meets the roof pitch?
I mounted my yagi on a 10' metal pole with the base in the ground tube and the pole secured to the side of my shack

 

[JoshuaHufford]

The metal in the overhang will cause some reflection on the yagi, but if its working OK in an RX mode only you can leave it alone. The metal mounting pole will act as a reflector but yagis are mounted to metal poles a lot with no problems.
If you have access to an antenna analyzer I'd throw it on and look at the results. Moving it further away from the metal overhang might offer some improvement.
Can you mount it on the facia where the overhang meets the roof pitch?
I mounted my yagi on a 10' metal pole with the base in the ground tube and the pole secured to the side of my shack

I had planned on moving it as far out as I could to get it away from the metal as much as possible.

The gutter is in the way to mount it against the facia.

 

[Fowler]

If you can build a stand off from the gutter (maybe below the gutter) You could secure it that way

 

[Fowler]

I had to get my yagi as high as possible to receive a 800mhz signal over a 10K mountain. I used an AOR receiver attached to my antenna lead and watched the RSSI to get the best signal when I varied the height and direction of the antenna.

 

[JoshuaHufford]

Well as much as I'd love to have mountains to look at in Missouri, it makes RF reception a bit easier!

 

[Fowler]

You are lucky sir. Im at 7200 ASL the mountain is 10800 ASL the transmitter is 6000 ASL on the other side....
Took a bit of finessing but I got it....