From distress call tools to forms of entertainment, radio receivers have played a huge role in modern methods of communication. A lot of engineering enthusiasts enjoy building their own shortwave radio receivers for personal needs. If you would like to build one, here's how experts recommend you go about it.
Before building a shortwave radio receiver, you need to make sure you get all the right tools and equipment from a store that sells technical items. Here are the steps you should follow:
- Take out your magnetic wire and fold it
- Remove the ends of the wire you left evident in step one
- Fix one end of the wire and secure it with a tape
- Cut the cord of the phone and spread out the wires inside by two inches
- Make an antenna
- Check if it works
Building a shortwave radio is quite easy because the materials needed to build them are not difficult to find. If you want to know more about how you can build your shortwave radio receiver stay put and keep reading.
How to Build a Shortwave Radio Reciever
Before building your shortwave radio receiver, you need a complete set of items. You need magnetic wires. To get these, you have to go to an electronic store. Getting a magnetic wire is very important when you are building your radio receiver.
- a glue stick
- one germanium diode
- one board to mount your radio on
- wire stripping pliers
- electrical tape
- a telephone cord
- a set of alligator leads
Steps On How To Build a Shortwave Reciever
Here are the steps on how to build a shortwave receiver:
Fold Your Magnetic Wire
Take out your magnetic wire and fold it to cover the glue stick or any entire cylindrical or round object you choose to use. You need to make sure the wire is tightly tied around the object. To achieve this, leave a portion of the wire to be evident.
Leave about six inches. After you're done with that, use your tape and tie the wire to the cylindrical or circular object. With another tape, mount the coil to the board.
Use the wire stripping pliers, and remove the ends of the wire you left evident in step one. That is quite an easy process because the ends of the wire are very thin.
Fix The Wires
From the right side of the coil down to the diode, fix one end of the wire. Use tape to secure this connection afterward, so it doesn’t fall off. Cut the phone's cord and spread the wires inside by two inches. While doing that, also make sure you tie the end of wires to the end of the diode.
In doing this, you need to be extremely patient because the wires are very thin and could be easily fractured. Use tape to secure this connection firmly.
Make an Antenna
The next step is to build an antenna. To do this, get your alligator clip and clip the remaining lead wires to the magnetic wires. It should be at the end of the wire. Leave the wire on the roll. Remove any piece or enamel wires stuck on the glue stick.
Testing Your Radio Reciever
Fix the cord of the telephone to its headset. The alligator wire you connected to the left side of your coil has to be placed on good ground. You need to find a good spot for it. You can use a pipe running into the ground. It serves as a perfect fit for it.
Unroll the wire of the antenna and place it in a high space to hang freely.
Checking For Frequency Sound
To hear a signal or frequency sound, you need to touch the alligator clip at the top of the coil. If you still can not hear any sound, do not be discouraged yet. All you need to do is loosen a screw of the faceplate of a light switch near your door.
Let it be loose enough to hold firmly your alligator clip. You don't have to remove the faceplate. If you get a weak signal, the problem might be from your antenna.
How Can I Get Better Reception Of My Shortwave Radio?
Suppose you're curious about how shortwave signals are transmitted. In that case, we can explain. They usually travel from their area of transmission to your radio after passing through different gases in the upper crust of the atmosphere right above the surface of the earth.
These gases are quite harsh, and this can affect your transmission signal in a great way. Let us look at a few tips on how you can get good reception for your radio receiver.
Charge Your Batteries
First, charge your batteries. If your radio receiver uses batteries, you may need to charge its batteries or use it in power mode. This way, you can conserve its battery energy for clearer signals.
Use Good Speakers
Most radio speakers have dull quality sounds. This could make the radio seem like it has a poor signal connection. To get a good audio quality, you might need to use an earpiece connected to your radio
Change The Direction of The Radio
Getting a good reception is determined by how close the transmitter is. You can place your radio on the window for proximity and less obstruction from the transmitter.
Stay in a Quiet Environment
If you are getting a few stations on your radio or a low-quality sound, it means your transmitter is blocked. Staying in a busy environment filled with noise and lots of people can hinder a smooth transmission to your radio. This makes your receiver overloaded.
Devices like generators, television, neon lamps, air conditioning systems, computers, washing machines, or even cars produce a noise that can affect the medium and short wave bands.
Electricity also has a way of causing interference in a smooth signal. If you notice that electricity is tampering with your radio signal, you can easily switch to using a battery-powered radio.
How Far Can Shortwave Radio Signals Travel?
The distance shortwave signals can travel is dependent on so many factors. Some include the technology used by the radio and the quality of components added by the manufacturers. Generally, shortwave radios can pick up signals from anywhere on earth including flying aircraft.
You can even receive transmissions and broadcasts from different parts of the world from one location. These signals travel in a linear method and the farther it gets the more diminished the signal becomes thereby making them harder to pick up.
How Long Should a Shortwave Radio Antenna Be?
Before making a shortwave antenna, make sure it is long enough to receive any radio wave transmission you want to receive. For a shortwave radio to work effectively, its broadcasting range needs to be farther than 50 feet. To have a good transmission from your antenna, it should be about one-fourth that length.
Does Anyone Still Use A Shortwave Radio?
Yes. people still use a shortwave radio. Although, it is not as rampant as it was during the 20th century. After the cold war, it was shut down by some western governments because they did not see any need to broadcast their output on shortwave radio services again.
Because AM services are quite expensive some broadcast houses like BBC, VON, AIR, and China international radio still use shortwave frequencies. Some people still listen to these stations for their interests.
It is not just used for broadcast purposes alone. Shortwave radio is used for diplomatic and emergency purposes as well.
Does A Long Wire Antenna Have To Be Straight?
A long wire can either be straight or tied around trees and walls to expose a good part of the wire in the air. Due to its variability, the effectiveness of the wire can work differently depending on how it is installed. For transmission, a straight wire is always the best.
Can Short Wave Pick Up Police?
Some shortwave radios cannot pick up police calls. This is because the police force uses VHF and UHF signals using FM frequencies. Although, some shortwave radios are designed to pick up and transmit signals that can help in emergency cases.
Is Ham Radio And Shortwave The Same?
Shortwave radios are like normal radios. The difference between a shortwave and ham radio is that shortwave radio can only receive a transmission from broadcast stations, while a ham radio can both receive and transmit from and to stations.
Is Shortwave FM Or AM?
Shortwave frequency operates between AM and FM. Because they can transmit from any far distance, you can have a good transmission of both frequencies.
Before building your shortwave radio receiver, you need a complete set of items. You need wires that are magnetic. To get these, you have to go to an electronic store. You need one board to mount your radio on, wire stripping pliers, electrical tape, telephone cord, and alligator leads in other to build your receiver.
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