Purchasing an antenna analyzer can be very expensive. Analyzers range in price from $300 up to $10,000 or more. Come on folks, this is a hobby here. I wish I had that much money to spend on ham radio. Thankfully there is an antenna analyzer kit put out by a ham radio club in Australia that is wonderful. It’s the VK5JST AERIAL ANALYSER designed by Jim. (See notes at the end of this article for how to order and contact the ham radio club)
Let’s jump to the finished project: This kit is for advanced builders which I wasn’t when I ordered it, but how do you get advanced, you build. So I built and it wasn’t really all that difficult to build. The first thing you want to do is block out some time and get some old movies to watch while working on it. I think I watched like 6 and by the end was getting a bit delirious. Since I’m a newbie at this, I’ll offer up my notes here and documentation on my building process. I hope this helps out someone. First off, you get a package with a lot of little parts. Hence, the word “kit”. At first you might pull your hair out but relax and the first thing you want to do is go through and check your parts. Do you have them all? Check against this list: http://www.users.on.net/~endsodds/partsmk2.doc Next, print off this component overlay: http://www.users.on.net/~endsodds/ovrlymk2.jpg I took a red marker and when I put a component in, I highlighted that component on the board to mark it done. I also marked off the components as done on the parts list after I got each on or each set installed. Here’s my cheat sheet for the resistor color codes. It helps when looking at them to look at this sheet. Of course, unless you have memorized all of those color codes. The little square pins threw me for a bit. I didn’t know what those were for. There were for test leads. I guess I could have figured that out. Put those in first, then solder on all the resistors. Then do whatever you feel like soldering in. Save the big black IC’s for last for installing but go ahead and solder in the dip sockets. There are two little wires on the component diagram showed wrapping around the positive and negative test terminals. When you are pretty much all done soldering, solder those on there. I didn’t have them soldered on and the thing wouldn’t work. When you solder in that LCD, you could follow the instructions that tell you to cut wires really little and then slip collars over them. I tried that, couldn’t get it work. Instead just solder wire directly into the hole on the board first, guess at some length you want it to be and cut it off. Just do two of them first though and start long. It is sort of like cutting hair, it’s easier to take off than put on. For the box cutting out the holes and everything can be time consuming. If you have a Dremel you are in great shape. If not, go buy one and save some sanity. Click here, http://www.users.on.net/~endsodds/analsr.htm for details on the analyzer. There is also a link on that site on how to order it from the ham radio club in Australia.
Here are some additional images of the finished product. This is the top right section of the analyzer:
Here you can see the frequency control in the center of the dial. I’ve attached a few wires with power coming in for a test.
This is a closeup of the back of the dial area.
A photo from a distance away.
Some of the integrated circuits listed.
That’s all there is. Definitely a fun project to do.