A GMRS radio is an affordable yet powerful option for two-way communication, which operates in GMRS frequencies of 462 to 467 MHz with 22 accessible channels. Like a ham radio, its use requires an FCC license, which can last ten years before requiring renewal. Before considering getting a GM...
The first radio broadcasts occurred in 1906 or so, and frequency allocation for AM radio occurred during the 1920s. (The predecessor to the FCC was established by Congress in 1927.) In the 1920s, radio and electronic capabilities were fairly limited, hence the relatively low frequencies for ...
As seen in the previous section, it is incredibly easy to transmit with static. All radios today, however, use continuous sine waves to transmit information. Very early radio transmitters emitted a large band of frequencies at once. All they could reproduce were simple noises which could be use...
You now need to find and be near an AM radio station's transmitting tower (within 1 mile/1.6 kilometer or so) for this to work. Here's what you do: Drive the stake into the ground or find a convenient metal fence post. Strip the insulation off the end of a 10-foot (3-meter) ...
To find scanner frequencies of the law enforcement and utilities, there’s nothing like the Radio Reference Database atwww.radioreference.comto get you started. Takeaway and First Lessons Somewhere in our discussion, I hope it will dawn on you that this “learning the recipes” approach to tac...
Because shortwave broadcasts are so easy to tune into, anyone with a cheap radio can eavesdrop by finding the right frequencies. That includes you. Many frequencies are listed at various web sites likeSpyNumbers. What you'll hear varies by station. Some stations broadcast continually. Others spr...
I was able to find the time this weekend to do just that, and make avideoof the process. Details of the resulting wire segment lengths are in the video. It is important to note that if you decide to build this antenna, your wire lengths will likely vary from mine. Several factors wil...
receives. In this case, the tuner is tuned to receive the 680,000-hertz signal. Tuners work using a principle called resonance. That is, tuners resonate at, and amplify, one particular frequency and ignore all the other frequencies in the air. It is easy to create aresonatorwith a...
You will find out what frequencies are used for RC toys, what the different components are and how they all work together. You will also learn what the difference between radio control and remote control is when talking about toys or models. Types of RC Toys RC toys come in a large ...
1. It must be able to be built or serviced easily in the field or at any home, with components that could be salvaged from near by electronics sources or a small electronics junk box.This means that components count should be kept very low and they must not be rare to find but commonl...