EMT Conduit Antenna Mast
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- čas přidán 28. 06. 2024
- Using EMT Conduit that I bought from the local home improvement for my 2m/440cm Jpole antenna.
10' EMT Conduit 1 1/2"
10' EMT Conduit 1 1/4"
~~~~~ Video Contents ~~~~~
00:00 Intro
02:32 Mast assembled
03:47 Black Jpole 2m/440cm Antenna
04:16 Mounting the Jpole to the Mast
04:54 Mounting the Mast into the 4' pipe.
06:05 Burying coax cable
06:50 Outro
Music: www.bensound.com/royalty-free-...
#HamRadio
#Antenna
#AntennaMast - Jak na to + styl
Consider running the coax through a garden hose before burying. You won't have to dig it up if you want to change or remove it. You can use a barrel connector on the existing coax to pull the replacement through. - Nice video!
A PL259 connector is about 18mm in diameter. Common 5/8-inch is 15mm. Even a rarer 3/4-inch hose (19mm) would BARELY accept it, and with even the slightest crush from being buried, forget it. Don't use a garden hose, use a larger and stiffer pipe maybe 1-inch diameter. Or don't bother; just direct bury and rip it out when it's going in the garbage anyway.
Excellent idea! KB4MIT
Wouldn't plastic conduit be cheaper than hose? Also, there's a diameter consideration. At least there's a choice of sizes with conduit.
@@JxH I think that the idea of the hose or conduit was to make any replacement of the coax easy if that becomes necessary, just use the old coax to pull the new line through, - no need to dig up the lawn to re bury the new run of coax.
@@Ropetangler
Why not use a conduit that is correctly sized, as opposed to a "garden hose" ?
Rest assured that I understand the basic point of a buried conduit. My gawd, is there anyone that doesn't ?
Nice set up, Neighbor.
We live in Riverside.
73 de KF4LBG...
Beautiful garden!
Extra points for using a shovel with flip flops. Nice job.
Hahaha, Florida Style!
New sub here. Just got in to 11 meter band. Super brand new at this... I like the idea of having coms of any capacity during a black out. great idea man....
Nice job. EMT conduit is a great resource for all kinds of antenna work....I use the one inch stuff to hold up my wire antenna...super strong and 17 bucks for 10 feet...can't beat it!
Great video, excellent ideas.
Great presentation!
Nice. I'm looking for cheap and practical antenna mast ideas. Thanks for sharing your solution. Looks great.
Mine is still up and survived 2 hurricanes. Also, I never did grounded my mast. All I have on it is a 2m/440 J-Pole.
Looks good. Gave me some ideas to work with.
Great job,liked this one 👏
Thank you for watching!
I like your project ,great antenna
Thank you
Nice project, this is precisely how i did my mast for my flagpole and it works great!
That being said i really think H.O.A's are too far in to peoples business and should examine themselves in the mirror first, Blue skies Capt!
KC5JSR, 73'
That was very helpful😃👍🏻
Cool video Darren, cheers n 73
I'm going to build something very similar and affix it to the apex of my shack's roof. Thank you for this great idea. 73 Captain, de K9RFT
Love it .
Great video. KO4BYU here and private pilot. Keep up the good work.
Great video.
Ok get it done
Helpful. Thanks.
I'm considering it. I have lots of storms in warmer months so I have to add grounds everywhere
Thanks for the great content. Subd and liked !
Thank you Luis!
You could stealth that mast by training some vines to grow up the mast. Then it will look like a support structure for your vine! Another idea is to have mounts on the mast to hold small potted plants. Then it would become a structure to hold your garden pots!
Great ideas! Thank you.
Plant some kudzu?
I've considered welding together a 20 ft tower out of rebar so that it would look like a scaled down version of one of the old style oil drilling rigs / derricks... Then plant some aggressive growing vines by the legs and let it take over it...
Of course, the BEST solution is not to move into an area with HOA Nazis in the first place...
When you run a bolt through thin wall pipe like that no matter how much you tighten the nut you'll never really get it tight. It just collapses the pipe. Instead, use nylock nuts. Those are nuts with a nylon insert that will stop the nut from spinning freely. Just snug it up, but don't distort the pipe. The copper coat is a good thing, too.
Good tip! Thank you!
Nice
Sweet
Now that looks really cool! Great job done, Capt. Darren. Looking forward to make contact with you. 73's de Your Friend Uncle Guenter
Thank you for the kind words Uncle Guenter. 73 de N4VFR
well done it looks good all the best Allan G6TMO stoke on Trent UK
cool
Good job Captn. 73 de AK7RF
I wrap one coil (with a zip tie) of coax where it connects to the antenna to take the strain off of it
Good idea.
Very stealthy.
Looks great. I like how the J-Pole is hidden in/behind the tree. Did you attach a grounding rod to your mast? Thanks
No, no grounding rod attached to the mast.
Nice set up but direct burial coax cable? Maybe some 1/2 PVC electrical conduit six inches deep not only would protect it from water intrusion but will also make it easy to replace the coax in the future. Use 90 degree fitting pull points at the antenna and into your shack. Just my 2 cents.
Nice project, thanks for sharing! Is the pole set to a fixed height? Would making it adjustable/telescoping be useful?
Mine is set up as a fixed height. I would need to modify it if I were planning to make it adjustable. I also have an EZ Push up Mast. It's 33' adjustable.
Hello: Do the 10 foot mast sections you’re bolting together have pre-drilled holes? Thank you.
Great job good video...73 👍
Thank you for watching Les! 73's
I understand that since it's a j-pole it doesn't need an RF ground, but should this have a lightning arrester at the base with a ground rod next to it? I've been thinking about doing something similar except using it as a point to tie off an EFHW extending from the house.
Excellent setup.. Is it grounded in the basement of the old TV base or it is not required..
I did not ground my 2m/7cm J-pole antenna mast. It's working well and haven't been strucked by lightning yet. Lightning would probably hit the trees before a direct hit but I'm taking the risk. I do however have a lightning arrester in my window passthrough.
Great use of materials available! That would not work as well where I live as the base would fill with water, freeze and burst in winter but you don't have to worry in FLA 😅
Drill a 1/8" hole near the bottom as a drain hole?
@@CurmudgeonExtraordinaire Could also add a rubber ring around the top of the 4-foot pipe.
@@TheComingGlory -- What would a ring around the top of the pipe do? Unless you are talking about basically making a grommet... But you would need to cap the pipe that is going into the 4-ft section of pipe also... Even with that though, you probably should consider a drain hole...
Going to be doing this for my helium miner , what’s the highest you think I can get it using the material you did while keeping it structurally sound? Love the DTV pole idea, I install them for work and have tons of those poles.What should I search for on Home Depot or lowes for the pipe?
If you have those DTV pipes, measure the diameter and goto HD or Lowes and get a conduit pipe in a smaller size so it can slide inside the DTV pipe. I dont remember the exact size however, if I were to guess, I would get a size 1/4 smaller. Maybe 1 1/2" diameter. I can put 2 conduits together without using guy wires. Remember to get a smaller size diameter for the upper sections and use the bolts in a crisscross pattern to prevent twisting. I hope that clarifies it a little. Happy New Year!
Another option for the cross bolts would be to use "EYE BOLTS", because you can use them for the guy wires. Just a thought. N4GST 7 3@@DarrenN4VFR
give me the link to the coax cable you used please sir I want to use the same high quality cable you use ok?
Good video, just wondering how it held up to big storms? With the tree branches swaying in heavy winds? Did you take it down during hurricanes?
J-Pole Mast is still standing inside those branches. Been through several hurricanes and been up for over 2 years.
When you do videos like this you need to show some after work such as SWR readings. Show a clip using the antenna to see if it's viable how far out it will reach, line noise, deflection from trees if any. Showing how to do it is fine, but showing it works is better.
Great ideas for future videos! Thank you!
Do you find you need the beads at the feedpoint or are you "just in case"?
Looks good .did you ground the mast
You know what? I did not ground the mast. I should. I also put a lightning arrestor at the window pass through.
Liked your idea, looks like the video is 2 years old, How is it working today?
It's still up and survived several hurricanes.
Hows it performing with it in the foliage of the tree and did you add a lightning arrestor and ground? I have mine mounted to a tree but imma add a section of pipe so it peaks up past the top of the tree.
It's still performing well. I swapped out my J-pole antenna and replaced it with a Tram ground plane vertical. Well, no lightning arrestor nor ground rode on this set up. If I added another section to past the tops of those trees, I would have to guy the mast. I'm happy with this height so far.
Would this setup work well for a tv antenna? Possibly adding guy wires
Yeah, maybe you can anchor the mast to your house eaves to add additional support.
@@DarrenN4VFR I was looking at 1" and 3/4 inch 10ft galvanized steel pipes to build this, but then saw your EMT piping build which would be cheaper and lighter. The DTV pole I'd be using is sitting about 2 ft from the structure so yes, tying into structure via guy wires will have to happen
What was the total length of the anchor pipe you put in the ground? How far did you pound the pipe in the ground? Weep holes towards bottom for water to drain?
I don't really remember, probably maybe about 2-3 feet deep and maybe 4 feet above the ground. No weep holes for drainage. I think it's open at the bottom of the pipe. 73's
Great job! I had two sections of ten foot threaded 1.5" EMT conduit screwed together and bolted to the side of my garage at my previous qth
I'm going for 3 this time around at my new place, but I'm doing a fold-over setup with a 33ft vertical on top of it. Should be fun!
That's good that you can attach it to the garage. Kinda prevents from guying.
Water is going to go into that white pve pipe next to the mast, cover it up. other wise, nice set up
N5DDZ thumbs up ! ... 73s
The instructions with my j-pole say to not attach it directly to a metal pole. Yours is OK?
Really? It's been working fine so far. Next time I'm home, I'll put it on a SWR Meter to check it out.
Darren, I'm new in the game, What is the J-pole for? Building something similar for a HAM radio set up. Any help would be greatly appreciated..
Will those emt pipes rust? Or are they fairly rust resistant?
It will eventually rust but I don't know the duration.
@@DarrenN4VFR if it's more than a couple years then it will be worth it to make one of these. Thanks for the reply.
Does it move or sway in the wind at all?
No, it's pretty stout.
Kind of a really small detail question. What size of bolt did you use?
To tell you the truth, I don't remember. I just estimated the diameter of the tubes and took an educated guess on the length of the bolts and take considerations that you will have nuts attached.
@@DarrenN4VFR Thanks for the reply! I actually ended up building this mast for my J-pole at my new QTH and it has worked amazingly! XYL is also pleased that the poles can be painted and blend into the background. Thanks for the video!
@@thomasb4329 That's so awesome! I'm glad I was able to help a fellow ham save some money than buying a push up mast. 73's de Capt Darren N4VFR
Hey did you make your own j pole antenna? or buy it?
I bought my J-pole from a fellow Ham. www.jpole-antenna.com/
Hello. question: what is the minimum size of the iron pipe 12 meters for lifting the yaghi fm antenna Dimensions antenna gauge L*W*H: 5500*900*1760 MM Weight: 5 KG? thank you!
Merry Christmas, I don't recommend a yagi on this mast. It may fall and damage your elements. It's your decision if you want to try it.
...So Now the Base Pole can Fill with Water and freeze and crack the pipe.
...Been there ...Done That!
What size are those magnetic
Are you referring to the Ferrite Beads? They're 11mm diamters. www.amazon.com/gp/product/B01CDU0D8I/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1
Are not worried about strong winds moving and getting into your antenna ?
2 weeks ago I had 70mph winds which broke my DX Commander in 3 places while my 2meter J-pole is still standing in the trees using this EMT Conduit Mast.
@@DarrenN4VFR Perhaps the tree branches prevented the antenna from breaking. Here the tree limbs would destroy my tv antenna if it was within their reach. I hope to have my license soon.
wont it break even without guy wires Sir? message back Sir... Nice setup Sir
Hello Eduardo, I'm not using guys wires on this setup. So far it's holding up good to strong winds in Florida. Not yet tested in Hurricane Winds. 73's
no guy wires?
None. It survived 40 mph winds from Hurricane Ian.
Good job but you are way too close to the trees
put the mast in the tree man ..
Ummm.. Have you read any of the ARRL Antenna books or guides?
They do describe the effects of vegetation near or around a radiating antenna.
Wouldn't want to have any twerking pipes
Hahahaha. Let's see 'em twerk! lol
the tree will block your signal
I hit my local repeaters fine, yes it will attenuate the xmit and rcv signals.
Sweet