: OTA Mounts, Towers, Rigging Hardware
2009-07-10, 01:04 PM
ontherooftop77, some questions about that original pole:
steel or galvanized steel?
how deep is it buried?
is it in concrete?
near a building of any sort?
There are likely some good possibilities based on what you can tell us about those.
2009-07-10, 03:10 PM
ok it's black, steel, its very secured not concrete but it did hold up large satellite dishes, it's not near any power lines or houses (it's actually right by the garden). But there are a few trees , one could hit the antenna during high winds and a couple trees in line of site to Buffalo, but if I can get something to add 8-10 feet and attach the bottom half of the CM4221HD to the top of the pole I extend, reception would be sweet. Just wondering if the tree does make a big difference? because I heard with the Leaves it does. So thats why I need the height, I also have this indoor with ok results, but there are walls and 6 houses obstructing the antenna while indoors, so I know for sure walls are worse than some leaves
and it looks ugly to have a 4 bay antenna on a entertainment center, plus I need to add a signal to a basement TV. I will get some pictures of this pole soon.
the black pole is pretty thick and strong maybe a half foot or more in diameter.
2009-07-10, 06:26 PM
With a satellite mount, you should be OK. I'd use a chimmney mount, spaced 18-24" apart. I'd also use EMT- 1" or 1 1/4". that gets you up 10 ft + the mount. If you need to go higher, just add another section of EMT. couplings are available to connect the sections together. If you go past one section, you need to use guy wires.
2009-07-10, 07:12 PM
ok...Since that pipe is about 1/2 foot diameter. One can actually built a small tower around it. But that will be too much work.
Not sure how handy you are...Here is my suggestion (easy and economical), go to Home Depot, get a 10'x1.5" EMT pipe, bolt to that big pipe. You can also extend the EMT pipe using another 1.25" EMT pipe via U-bolts (Home Depot). You may need to use guy wires on the EMT pipe to prevent any wind from shaking the antenna.
My suggestion is do one section first and see how the reception goes before extending the pipe.
2009-07-10, 08:28 PM
It looks like a solved one problem with my Homemade Balun ( see balun thread ),
now I decide to put my 10y13s yagi higher on the tower but my signal was getting weaker.
I took the 10y13s on my head and moved out of the tower. Guess what ? The signal really improved.
I found a sweet spot on the other side of my chimney.
My questions to you are :
Can I used a chimney mount for my yagi?
If yes, what is the diameter of the pipe and what is the maximum length of the pipe I can use safely ?
Thanks for your time,
2009-07-10, 08:38 PM
would I need guy wires , if I only use 1 Emt pipe mounted I just need 10 feet, I also gotta find something to attach the EMT to the black pole.
2009-07-10, 09:05 PM
Onthe roof:As long as 10ft is all you need, no guy wires needed. Use a chimney mount to attach the EMT to the base mount.
2009-07-10, 09:08 PM
Intravino:as long as the chimney is in good structural shape, a chimney mount will work. Standard mast length is 5 ft. , either 1 1/4" or 1 1/2" dia.
2009-07-10, 09:26 PM
I was maybe looking at a J-mount for the yagi mounted at the Chimney.
Or a better and longer horizontal J mast mounted to the tower.
I have already a chimney mount with 2 straps on my chimney for helping supporting my tower.
The tower is supported also by 2 mount on the brick on the side on the house.
2009-07-11, 12:17 AM
just mounted a 4 bay clone antenna to my metal balcony - what should i do for grounding?Everything you need to know about grounding is in the Grounding Info & Standards: OTA/Dish/CATV/Telecom (http://www.digitalhome.ca/forum/showthread.php?t=62265) thread, including previous answers to that exact question. :)
2009-07-11, 07:47 PM
Can I use a Channel Master wall mount on a brick chimney?
If yes, is it stable and strong?
My problem is that I have allready a chimney mount on my chimney.
It was installed there by the previous owner of my house for an extra security on the 40 feet tower. There are two straps on the chinmey. The tower is mainly supported by two huge brackets on the brick wall and a eave mount.
2009-07-12, 01:15 AM
CM wall mount will work on the brick chimney. I'm not sure how big is your Yagi antenna, how about using the Winegard Ds-2416 28 inch J-pole and attach it to the tower?
2009-07-12, 02:40 AM
My yagi is 6'8¾"
The yagi has to clear the tower by the front.
The yagi has to be placed in the front of the tower right side.
So the clearance has to be at least 3.5 '' between the pole and the tower.
I asked last year a dealer here in Montreal about a side mount and he said it would have to be custom made at a metal shop.
2009-07-12, 10:57 AM
That Winegard DS-2416 and CM9036 will give about 18" stand off from the wall. You can use them on the chimney away from the tower, that will give enough clearance and height for your Yagi antenna.
The other option ( a little more work) is like the picture below. Attach two pipes (using U clamps) to the tower to form an extension. Next, attach a mast to the extended pipe.
2009-07-12, 12:19 PM
A tower side mount is not something I would consider without consulting the manufacturer of the tower, a structural engineer, or a ham radio club to see if it will bear those very strong forces. Attaching an antenna directly to one of the tower's uprights is done all the time, but extending poles off the side of the tower is risky. Even a piece of extruded steel pipe might seem light at the store but try to hold it out at arm's length for an hour and you'll see what I mean by strain. Now add some ice and snow, as well as a stiff breeze and you have quite a few forces acting on it to strain the whole tower. PVC is too flexible to use as a side mount.
If the tower is a strong one, such as a Delhi DMX 16ga. self-supporting model, you can mount several light antennas at the top (see mlord's tower photos)
If it is a guyed tower of the more common 18ga. type like Radio Shack or Delhi sold to consumers you would throw off the symmetry of the tower, which is part of what gives it stability and thus longevity
intravino's tower photos show a bunch of gear up on his tower already, so a side mount would add more weight and assymetryI'm not saying it is impossible - I'm saying be careful. :eek:
2009-07-12, 12:54 PM
Thanks Kooguy, you just gave more advice then all of specialize stores here in Montreal ( except Raybel, I did not call them yet ). I will check the winegard DS-2416 and CM9036.
Btw, how do fix the J mount to the brick? Tapcon or is there something better? How do weather proof the holes in the brick?
* If the tower is a strong one, such as a Delhi DMX 16ga. self-supporting model, you can mount several light antennas at the top (see mlord's tower photos)
* If it is a guyed tower of the more common 18ga. type like Radio Shack or Delhi sold to consumers you would throw off the symmetry of the tower, which is part of what gives it stability and thus longevity
* intravino's tower photos show a bunch of gear up on his tower already, so a side mount would add more weight and assymetry.
Good point Stampeder, I have to think about that, Kooguy setup looks good by I don't want the tower to move. I would have to show you the picture of the crappy mount I got at Addison for fxing the yagi on the tower, very scary. it just stayed there 8 months on the tower and the J tube started to rust a lot.
My tower is not a top grade; These are better pictures http://img524.imageshack.us/img524
Note: there is a 4228 and 4221 attach to it now.
One last point: I have already a chimney mount for extras security for the tower on my chimney ( picture bellow ), could I put an other for the Yagi on the Chimney? Or is that too much for the Chimney. The mortar joints have been redone last month on the brick by a professional.
Thanks for your time Kooguy and Stampeder,
2009-07-12, 01:14 PM
intravino, that's a very informative photo:
Unless it is just a photographic glitch it looks like where the tower sections meet the line is no longer a straight one. Does your tower have a slight lean to it away from the chimney mounts above that joint?
2009-07-12, 02:22 PM
is it possible to mount a EMT pipe clamped together on a J pole?
2009-07-12, 02:46 PM
Only if it is very small and light - see Post #969.
2009-07-12, 06:47 PM
OK stampeder I will use a small J pole that attaches to the black pole and maybe use 2 U bolts to hold the bottom of the J pipe and then I will U bolt the top EMT with the 4 bay channel master,