![]() The wording is confusing, because it starts out talking about campus operation. Posted in Hackaday Columns, Radio Hacks Tagged am radio, amplitude modulation, internet radio, mp3 player, playlist, radio, transmitter Post navigationĪnother comment, related to AM broadcasting (in the US): if you read FCC Part 15, there is a section that covers carrier current broadcasting. For now, I’m happy to tune into something that I want to hear on myAM dial! I didn’t build my own transmitter, but I’m having a lot of fun and I may take on one of those transmitter designs as a future project. Dust Off Those AM Radios, There’s Something Good On!īelow is a demo of my short-range AM transmitter operating a pre-war battery set, a mid-century Telefunken tabletop radio, and two WW2 military radios. You can have a listen here and even download the file to add to your short-range AM radio station’s playlist. It sounds as if a pre-war radio program bounced off a large cloud of interstellar dust back to earth many light years later. The quality and creativity are absolutely amazing. It is basically an entire quasi-live jazz concert broadcast by someone out of his basement from a suburb of Detroit. One called ‘Grosse Pointe Gardens’ is my favorite. ![]() There are also some excellent recordings of pirate AM broadcasts available online. I also found these vintage commercials which can be fun to sprinkle into your playlist. But this wasn’t enough, after some digging I found numerous WW2 news bulletins from the front as well as recordings of music programs. My preference is for pre-1950’s jazz and swing music, so I loaded my playlist accordingly. Most of the fun in this is actually locating and loading up unique content, putting it in the right sequence - you know, being an AM radio DJ! Grab an old phone, iPod, or even a reel to reel as your music source anything with a headphone jack that plays audio will do. I looked around and found this inexpensive bare-board MP3 player on eBay and simply glued it to the top of the box. You need not be limited to my suggestion, other AM transmitter options include the SSTRAN, and the ‘talking house‘. I’m sure that if a really long wire were used you could cover your entire block, but not much further. I’ve found that by adding more wire you can significantly increase the range. Spitfire’s output is only 100mW into a very short inefficient antenna. Given these requirements I settled on the Spitfire. I also wanted decent quality modulation so I didn’t want to use a grid modulated AM transmitter. I wanted something that would work straight out of the box. The Easy Way: Buy an AM Transmitter.Īs for me, I have two young children, a demanding job, and not as much time as I used to. These were popularly used as cost-saving devices in later-model vacuum tube television sets. The compactron is basically 3 tubes crammed into one envelope. For a more advanced single-tube AM transmitter you have to check out Robert Weaver’s design which uses a compactron.
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