Antenna Adventure and Stuff

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Like most amateur radio operators I tend to accumulate a lot of stuff. I’ll find something and think ‘oh, that might be useful some day’ or ‘wow, that’s a good price I should get that because I’ll use it some day’. You know the kind of thing. The end result is I have more PL-259 connectors than I’ll ever use in my lifetime, spools of coax cable, rope, miscellaneous spools of wire, bits of this and that, oddball electronics, rather intimidating looking radios, test equipment and tools…

Making things worse is I’m fascinated with antennas and how radio waves propagate, so I have stuff used to make antennas, and even complete antenna systems that I’ve picked up along the way. Including the one in the photo, a Gap Titan DX vertical antenna that’s been laying in a box upstairs since I got it about three or more years ago.

It was intended to replace the Comet 250 vertical I’ve had since I first got my license. Now the Comet works. Sort of.  It’s dirt simple to put up, being little more than 21 foot long aluminum pole that bolts to a pipe hammered into the ground. But let’s face it, it isn’t really a very good antenna, especially at lower frequencies. It was intended to be a stop gap measure, something I could use to get on the air quickly and easily, with the intention of eventually replacing it with something else.

I eventually put up an OCFD that’s my primary antenna, but I kept the Comet up more for reasons of nostalgia than because it worked, which it pretty much didn’t. Oh, I made some contacts using it, but the intention was always to replace it with something better like the Gap Titan, or a vertical from DX Engineering that I picked up around the same time.

Eldest son showed up yesterday and said the Comet was coming down and we’re going to put that Gap Titan. Period. Okay… We worked out in the driveway during the hottest day of the year so far, gulping down water, sweating through our clothes, and finally got it put together. Mostly. It isn’t that difficult to assemble. The instructions are phrased a bit oddly, but if you take your time and pay attention to the diagrams it isn’t hard. And this is about as far as we got because now we are at the point where we have to put the counterpoise together, and that can’t really be done until it’s up because the counterpoise consists of four long aluminum rods about four feet long that are linked together with copper wire and goes around the bottom section of the antenna.

Then we realized that where we wanted to put it, where the Comet is now, isn’t going to actually work because we’d badly underestimated the size of the counterpoise. The Comet, being little more than a big stick with a can on the end containing the matching coils, takes up almost no room at all, and is bolted to a piece of pipe hammered into the ground. It has no counterpoise, no radials, nothing. Just a big stick, like I said. This, though, was going to require a space of about 8 feet across.

I wanted to keep it low to the ground despite the fact that would not help it’s performance. That would mean we wouldn’t have to guy it, it would be easy to take it down if necessary, and it would be easy to adjust. We considered putting it in different parts of the yard, and that would have worked, but that counterpoise would always be awkward to deal with and almost certainly someone would run a lawnmower or something into it. And we’d have to make a new feed line and bury it, and while I probably have about a thousand feet of coax laying around the house, none of it is rated for in-ground use so I’d have to get more, and we’d have to dig a trench and, well, this was starting to look like more work than we really wanted to get involved with.

And then there was the safety aspect of the whole thing. I rarely put more than 30 watts into the Comet, using it mostly for low power digital communications like PSK. Besides, the Comet can only handle about 200 watts anyway before the coils will melt down or something. The Gap, on the other hand is rated for a full 1,500 watts output, and I often use amplifiers putting out 600 – 1,500 watts when conditions warrant it. So getting it higher up would be advisable just in case some goof ball decided to grab the antenna just as I key a mic and dump 1,500 watts into the thing. You can get some nasty burns from RF at those frequencies and power levels.

So eldest son decided the best thing to do was go up. Keep it in the same location, but up above the roof of the garage where it would be out of the way and where it would probably work better anyway. But that meant we had to put up guy lines to keep it from falling over, so he’d have to go buy… No, you don’t, I told him, and rummaged around in my boxes and came up with a complete guying kit, including a few hundred feet of nonconductive line, tie downs and other goodies. And then he said well, it would be nice if we could put in a tip over mount so we can lower it down in case of storms and stuff so I should look into that. And, well, a trip to the famous “box o’ stuff” (well, actually many boxes) turned up a tip over mount originally intended for a DX Engineering antenna that would work… Sometimes it pays to hang onto all that stuff. So all we really had to buy was some sturdy pipe or something to get it about 10 feet up so it would clear the garage roof, and he went off with the truck in search of that.

Now I have absolutely no idea how he’s planning on doing this. As MrsGF pointed out, he’s the genius in the family and it’s best to just leave him alone and let him do it because he’s generally right. So we’ll see what’ll happen.

If we get a chance to actually do it. It looks like more storms are on the way, and working on antennas with thunder storms in the area is generally considered a bad thing to do.

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