Buckmaster OCF Dipole

I can’t believe my antenna’s up!

I suppose the title could also be: (or how I learned to stop procrastinating and finally put up my HF antenna)

Well, I did it. I finally got my HF antenna up after months of admiring it through plastic wrap and having the world’s most expensive paperweight (IC-7300) sitting in my metashack (how could I really ascribe any reality to it when it was still merely a concept). What I would like to accomplish in this article is not only a description of the construction etc., but also of some mental gymnastics I had to do in order to get to the finish line.

Way back in February, I was able to get my General license. I was pretty stoked (to use the common tongue) and looking forward to getting it up and going. This required, essentially, two things: a radio and an antenna. Easy-peazy, right? The first really was easy. I wanted a 7300. Who didn’t? The proverbial ICOM bandwagon drove by my house daily. Several times a day while banging on a few drums. So, I did my homework as best as I could, talked to a few folks, and with not much arm twisting, bought a rig. Now I needed the antenna. And some drums…

For this portion of the ordeal I ended up doing my homework a little more. I spoke to Fred and Anita at length about their choices: read their blog, saw their own setup in person, read posts in the Elmering session of Nashua ARC’s website, read comments on eHam.net about various antenna types. Some factors to of course consider are — in no particular order:

    1. Budget
    2. How much help you will have to put this up
    3. Aesthetics
    4. Available real estate
    5. How many bands do you want to work

At my QTH in MA, I have 0.5 acres in the front and back.

My QTH in Tewksbury, MA
My QTH in Tewksbury, MA

Having done my homework, I decided to go with the Buckmaster 7-band off-center fed dipole rated for 3 kW.

3 kW antenna at the top
3 kW antenna at the top

I think the price point was a bit north of 300 bucks. Having made up my mind, I didn’t do anything about it. Upon reflection, I think I really didn’t act because work consumed me until mid-May. I literally had no free weekends for months, so there was no rush. In the interim, Fred and Anita had opened up their station for use, and I took joy in hearing about others’ QSO’s for a while.

In order to still feel like a HAM, however, I decided to take my Extra exam in May. Once I that got out of the way I bought the Buckmaster in June on one fateful Thursday afternoon, and again, there it sat in the metashack until September. Excuse #2: Honestly, with a project this big (at least for me) I think I was a bit gun-shy to get it up. I felt unqualified to do it; and maybe even afraid to fail amidst all these competent people in the club.

Up until now, this may have read as Dear Diary, so let’s get to some actual station construction! Labor Day weekend was the ticket.

Good grief was this tough! Probably 85-90% of the total time was spent trying to figure this out. Mainly because, looking at the graphic, I had to get this about 35 ft. in the air. I got frustrated pretty quickly…

Buckmaster OCF dipole installation picture. Right from their website
Buckmaster OCF dipole installation picture. Right from their website

Now maybe that doesn’t seem like it’s that high, but I assure you, it becomes pretty darn high when you keep failing. So thinking about the problem and researching on the internet led me to some methods to try to get a rope up in the tree:

  1. Use a potato gun
  2. Call folks from the club to come lend a hand
  3. Rent a scissor lift from Home Depot
  4. Use a bow and arrow
  5. Use rope tied to a rock or stick and try to launch over the branch I want.

Here was what the jury decided on each of these options:

  1. Built one! Fires really well, but had issues initially with sparking it in the combustion chamber. Turns out the reason was due to insufficient amounts of butane getting into the chamber. In any case, I abandoned this as a choice. But who’s to say I can’t be mischievous at a later date.
  2. I felt bad bothering folks despite one ethos of amateur radio is to elmer each other, so I didn’t ask for help. Bad news bears to those of you in the same predicament.
  3. Too expensive for the little time I needed it. I think Home Despot (spelling error intentional) wanted something in the neighborhood of 200 bucks or more.
  4. Don’t have one and nearest friend with one lived in Carlisle. Would have to work around his schedule and at this point I was thru being patient.
  5. Rock idea worked reasonably well, but honestly, the best option was to get a stick and tie nylon fishing line around it. I have a pretty good arm it turns out, so I tied fishing line around the stick and started throwing.

In full disclosure, the elimination of these options takes us from Friday to Monday. Wisps of steam could be seen emanating from my ears.

The stick was attaining the requisite height and hitting where I needed it to. The huge snag (no pun intended), though, was the fishing line was getting caught in the branches on the way down. Yet another problem. Cue engineer father-in-law. He’s the guy labeled “this guy” in the picture.

helper dude
helper dude

He recommended winding a large amount of fishing line around the stick (but not all of it so that there would still be some left over on my side of the branch) so that when it came down the other side of the branch, it would unravel and not be as likely to get caught. This worked like a charm!

With fishing line on either side of the branch, we tied the actual nylon, water / UV resistant rope (which I picked up at Home Despot) somewhere 25% up my side of the fishing line and then got on the far side of the branch and began hoisting it up. This also worked out very well.

Same father-in-law and hanging ropes which will support the Buckmaster
Same father-in-law and hanging ropes which will support the Buckmaster

Finally, with the rope I actually want to use over the tree, I tied the Buckmaster to one end of the rope on my side of the branch, and then raised it up. I lowered and raised it a few times to make sure it wouldn’t get caught in the tree at any place. I tied off the free end through an eye screw that I screwed into the tree.

The coax I used was LMR-400. Again, doing my homework, I decided to splurge and buy 200 ft of coax but without the PL-259 connectors. I did this because I wanted to be able to cut the coax where I wished and would subsequently learn how to attach the connectors myself. This too, turned out to be a relatively easy job. I picked up some connectors at the Boxboro Hamvention and borrows Dave’s (N1RF) crimper set (with dies) to attach the connectors. Taking my time, I was able to do both ends of the 200 ft coax in about 30 minutes tops. I also purchased some Super 88 electrical tape from Home Depot as well as used Scotch’s 2228 Moisture Sealing Electrical Tape (some other folks use Coaxwrap) for weatherproofing. I applied this following Fred’s suggestion on his blog.

Layers of super 88 and weatherproofing electrical tape fastened to antenna connection point
Layers of super 88 and weatherproofing electrical tape fastened to antenna connection point

With the feed-point set up, I then purchased two more nylon, water/UV resistant ropes to connector to the Buckmaster’s insulators. I found that the 3/16” diameter by 100 ft. rope worked well (3/16″ fit nicely through the insulators’ 1/2″ holes), again purchased at Home Depot. Shirley, the cashier, shot me a smile after ringing me up for the umpteenth time. To temporarily tie these off, I terminated the rope through some more eye screws I screwed into trees in my yard. But for the final installation, I will again follow Fred’s advice from his blog post.

Then, I ran inside, ran the coax through the window thereby performing the transformation of the metashack into a protoshack! (Proto because it’s in the process of getting changed and upgraded) Ta da! Prestidigitation! That night I worked Brazil and the Czech Republic on 20 and 40 m respectively, and Australia around 0615 the next morning on 20m.

Protoshack. Coax not shown.
Protoshack. Coax not shown.

My follow up projects:

  1. I never mentioned grounding. I do have an 8 ft copper ground rod that I will install. I bought lightening arresters from DX Engineering: I have the kind that allow the passage of DC voltage which is needed for utilizing an antenna switch down the road. Since I plan on buying an antenna switch later, this seemed like a good option. This entire installation will take some time, so I need to find a free weekend. For now, I am only operating when the skies look perfect!
  2. Install my 15 m dipole that I bought from the HRO and covers the band not covered but the Buckmaster. This will likely happen in the Spring. For reals.
  3. Track down RF interference sources in my home and install the necessary chokes and beads. I’m kind of looking forward to this step.
  4. Find a final resting height for the radiating wires of my Buckmaster. I have a cousin with tree climbing equipment. Once he comes over to trim some branches etc., I am going to try and make a 180 degree angle with the wires as best as I can. Additionally, my wife wants me to switch out the white, nylon, water/UV resistant rope with dark colored rope since it’s a bit too visible.

Once I got going, I really had a blast. If I can be of any help to anyone about this, please feel free to send me a reply or contact me on the club website. Thanks a lot for following me through the whirlwinds that are my thoughts, and see you on the air!

Best and 73,

Brian (AB1ZO)

3 thoughts on “I can’t believe my antenna’s up!”

  1. Great article about putting an antenna up and getting on the air – nice job Brian! When you have time, give 40m a try early in the day (around the grey line) and you’ll work Australia and New Zealand on 40 as well. There are some good DX nets that meet early most days on 40m. You might want to give these a try as well. Have fun!

  2. Brian, Your story resonates with this ham. I like you installed the buckmaster- really like the build quality on this. I didn’t really procrastinate in the build but once everything was in and installed analyzed etc. I probably sat at my operating position in the shack for like 20 minutes thinking, what if I messed up, what if I forgot something, I don’t know how to make a QSO, what if I make a fool out of myself on air… I tool a deep breath- pushed the button, tuned a strong signal announced my call- yelled to my wife “Honey I just made Italy…” and have never looked back. Well done, and very well written I suspect many new hams have or are feeling this way. In future give me a call I would have been more than happy to help out. Nothing like making your first QSO’s from the shack you built yourself it is an incredible feeling.

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