Tag: loop antenna

November 7, 2023 – Final AM Loop Antenna Results

November 7, 2023 /

Two worlds are colliding. The clean-up of the basement and my commitment to not leave things hanging have finally met. I wanted to get rid of this wire wrapped box that I have been hanging on to for almost two years now. But, I couldn’t get rid of it until I finally completed the modifications that I wanted to make.

One of the suggestions on my YouTube video was that my capacitor was not adequate. If you remember, it was an Aluminum foil wrapped card inside of an envelope. One of those was sandwiched between two others. The paper of the envelope acted as an insulator for the conductors and in theory, sliding the envelope back and forth was the fine tuning of the antenna.

I purchased an air capacitor that I see commonly used on DIY antenna videos. The plan was to replace the envelope capacitors with this relatively expensive component ($35) and hopefully this would be the trick. After the part arrived from Germany, I set about with this new round of experiments.

I decided to take what I thought was my worst AM tuner (an old Walkman… how about that) and the best AM tuner, my CCrane radio and test them outside and inside of the box. With the device inside the box, I would mess with the capacitor to see if there was any improvement in reception. Interestingly enough, the CCrane radio also has antenna inputs, so I tried that as well.

First of all, I will remind you that AM reception is directional. As far as I am concerned, I saw zero impact with respect to reception inside versus outside the box of either radio. It also appeared that any fiddling with the capacitor made no change to the reception. Orientation of the box with respect to the transmission tower did make a difference, but again there was no difference the radio itself.

What conclusion can I draw from this whole thing? The only thing that I can say conclusively is that this box antenna has no effect on reception. As a result I broke the whole thing down so that I could continue with my rampage of cleanup. I very well may try this again, but this time with different wire.

The wire I purchased was Aluminum at the second hand store. I wonder if changing from an insulated wire to a non-insulated one might help pick up signals. Buying a nice, new spool of wire kind of violates my principal of making this cheap or out of junk. To really get this dialed in on what components will work requires it to work in the first place. I just didn’t see that.

I don’t offer this enough, but if someone sees what I am doing wrong, by all means help me out. Now that I have outlaid the cash for a commercial antenna, I really don’t have any drive to put anymore energy into this endeavor. It is a good idea to learn from failure though.

End Your Programming Routine: When I first ran across the plans for this antenna, I had visions of young kids scavenging materials to gather around the radio and listen to a soccer game in some third world country. It may be that I don’t know what I don’t know but if that is the case, then this project is much more precise than I gave it (and I thought I followed the instructions to the letter). To be fair, I don’t have a full grasp of the science of antennas so it is possible that this can work, I have to say that my experience says it is not worth the time.

July 5, 2022 – My Antenna Fetish Continues

July 5, 2022 /

In my quest to get better AM reception, I ran across this very affordable antenna setup. First, I am going to beta test this versus the traditional loop antenna (the one that came with the receiver). If all goes well, I will permanently mount this outside. If this setup doesn’t work, I have one more play, there is another antenna available from CCrane that I might try.

I actually didn’t really realize this, but the AM band is the same frequency of some shortwave bands. Signals on the AM band range from 530 – 1710 kHz. This antenna is rated for 0.5 – 30 mHz (or 500 – 30,000 kHz) so it should work beautifully. This antenna is specifically intended for shortwave reception, conveniently AM radio is in the appropriate range.

My first test was to simply assemble the antenna and connect it. I did a quick scan through the spectrum and picked up 20 or so channels. That was a positive sign.

Now that I knew it was going to work, I started researching cable extensions. This particular antenna is built with a 10m (33ish feet) of cable. I haven’t measured anything, but I am probably going to need 100 feet or more. In this case, my preference would be to build my own cable but I need the proper tools to do that. The connection is called an RJ-476 which looks like a miniature TV cable end.

Another problem that I had to solve for is my radio has two wire connector input, not an RJ-476. As you might know, with a cable there is a conductor and a ground. The conductor is the center wire but the ground comes off the shielding. Typically, the ground connection is made when you screw the connector in place. Now we are talking about solder and other things. Fortunately I found a cable that splits for appropriate use. The lesson is know how your are going to connect to your radio.

It’s going to be awhile before my priorities are going to align and I actually mount this antenna on the roof. I would hope to get it done before the end of summer. Regardless, I built a frame for the antenna because the loop is so floppy. Since AM signals are directional, the frame allows for a much easier ‘tuning’ of the antenna since it is so floppy.

My hope is that I get the antenna out of the basement and up on the roof I won’t have as much as a need for directional tuning. If that turns out to not be the case, then I have a couple stations in mind that I have not been able to get with any current antenna setup and I will be happy.

End Your Programming Routine: It must be that nobody listens to AM radio through their stereo tuner. I am speculating that the majority of AM listening must be in the car. I am rather surprised by the lack of antenna choices (or information) anywhere. Maybe there is a business opportunity here? I will be happy to eventually tune into the local university sports though.

January 10, 2022 – The AM Antenna Video Anyway

January 10, 2022 /

I was thinking that I spent a bunch of time taking video about the process and that maybe I would get some feedback on how to make it better if I posted it.  So, that is what I did.

Not having done this a ton, I am always surprised at how much work creating videos are.   Whether it is holding the phone the wrong orientation or trimming beginning and end of clips to make good transitions, this five minute video took a couple of hours to edit (and that is with very little actual editing).

I suppose that if I am going to do more of this, I should invest in a few items to produce better quality.  I need a tripod so I can get action shots as there is only so much you can do one handed.  I may need another camera for better angles as well, like a GoPro for head mountability, I don’t know.  Part of my hesitation is that is I am not terribly interested in creating a lot of video.  What I do, I want to do well.  

I was thinking about my interest in antennas and old tech and I started thinking about radios.  I think I could get into amateur radio.  I like approachable tech, science and DIY that seems tailor made.  Plus, at least traditionally these were the ‘good guys’ in disasters like Hurricane Katrina.  That seems right up my ally as well.

I don’t know yet, I need to do more research.  I certainly don’t need another expensive or gear and time intensive hobby.  I think preferably where I would start is a secondhand CB and a DIY antenna project.  

End Your Programming Routine:  I am keeping it short today.  The whole point of spending time on the video was to use it.  Since this video has been up a couple of days, I have already gotten some tips, so there may be another version in the works.  I can probably reuse many of the components making this faster yet to do.