How To Make FM Antenna For Stereo Receiver: DIY FM Antenna

Dipole antennas are exclusively used for the purpose of reception of FM broadcasts. Inventory FM catching devices there are internal antennas present with.

Just in case if you don't have an internal FM antenna, you can use a dipole antenna that can compensate for the FM signal frequency. FM antenna provides maximum reception even if you have a small signal range.

FM signals need an external antenna for reception because their range is very small, about 50 miles. So, if you want to have FM signals to cover a high range, you need a high-frequency antenna for this purpose.

Making a simple DIY dipole antenna is very easy. There are several ways by which you can make them, and they cost very low.

Determining The Length Of A Dipole Antenna

The length of a dipole antenna is known by the frequency at which it operates. The frequency of FM broadcast ranges from 87.5 megahertz to 108 megahertz. A dipole antenna works at this band range of FM radiofrequency.

Making A Dipole FM Antenna For Stereo Receiver

So, you just need to have four things along with you are coaxial cable to make an FM dipole antenna for the stereo receiver successfully at home. The thing you need is a twin flex. The next thing that you would need is some cable wraps that are used to prevent the center of the dipole from opening out.

The third thing that is required is a simple piece of string to secure the two corners of the dipole. The last thing that you need is some connectors that connect the twin flex with the coaxial cable.

The twin flex is a feeder for catching radio frequency signals and has a resistance of 70 ohms. It is reasonable for use in making a dipole FM antenna.

For this purpose, we can have two insulated wires whose insulation has been ripped off of about 1 inch and the center of the wire should we secure it to prevent the further opening of insulated wires.

Dipole FM Antenna For Stereo Receiver

The uninsulated wires can be used as a feeder for the dipole FM antenna. The length of wire for an FM dipole antenna is important and should be kept in consideration as because the resonant frequency of the FM broadcast depends highly upon the length of the cable you are using. The advisable length of wire for each side of the antenna is 70 to 75 cm.

The two ends of the wires are knotted together, but the length of the loop is not considered in the length of the antenna. The knot acts as a source of inductance in the antenna reception frequency, but it is considered to be fine for receiving signals.

The last step is to connect the twin flex wires with the coaxial cable that has already been installed around your house. But the case of attachment of the twin flex is different from an antenna as the height diminishes the signal strength and frequency.

If you attach the twin flex much closer to your roof, the signals would be distorted, and make sure that there are no metal objects in its path. A dipole antenna attached in a vertical position works better for FM signal reception.

Making An FM Folded Dipole Antenna

A folded FM dipole antenna has a 300-ohm ribbon wire in length attached to the connector terminals of about 300 ohms. This length is ideal for making an FM stereo dipole antenna. Here is a description of step by step process of making a folded FM dipole antenna.

  • The first step is to take the ribbon wire in the length of few inches longer than required. Then we need to cut the wire and divide it into two pieces of equal length.
  • The second step is to strip off the insulation of the two wires from one end and tie the two uninsulated corners of wires together.
  • The third step is to cut the bottom wire from the very center and can be stripped back to attach one and of the ribbon. This is how the ribbon wire is used as a feeder to get an FM radio signal.
  • The last step is to mount the double FM dipole antenna. It should be mounted at an average height, but the metal obstacles in its path must be removed. This antenna is suitable for capturing the signals of high-frequency and is very convenient to make.

Making A Half-Wave Dipole FM Antenna

Making a half-wave dipole FM antenna is a very easy process, and its better reception as compared to other antennas, such as the most commonly used rabbit ear antennas. It uses two wires of equal lengths with their insulation being stripped off and connected with each other.

Making A Half-Wave Dipole FM Antenna
  • Take about 3 feet of wire and make a T shape of the wire. As we have connected the 3 feet of wires together, we now have a total length of 7 feet wire.
  • Now strip the insulation from two ends of the wires about 1 to 2 inches.
  • The next step involves finding the external connection of the antenna. It is mostly labeled as 'ant.' Now, take the two wires together and form a loop of them by crossing them over one another.
  • These two wires have been twisted over one another to form a single wire; we need to plug in that wire in the external connection of the antenna.
  • Now the connection of the antenna is established, the next step is to choose a location for your FM stereo receiver.
  • For having the best quality FM radio signals, it is advisable to place your FM stereo close to the window or an open space if possible.
  • The directive is the attachment of the FM antenna wire with your FM stereo receiver. For this purpose, rundown the wire through your window or open space and connect it towards the external end of the stereo really present at the back of it.
  • To the spot as high as possible to Mount the antenna wire and then use a nail to hang the antenna wire in a predetermined location. 

As we have taken the two wires initially and we are making a dipole antenna, so we need to stretch the two wires in opposite directions as far as possible on the external side of the window. Attach both the wires for hanging with a nail.

Testing The Radio Signals

The physical attachments have been made for the FM stereo receiver. Your next step is to test the signals whether your homemade antenna is working properly or not. You should check the signal level for your tuned stations by turning on your receiver.

If you do not hear a clear voice, then you can reposition your FM stereo receiver to another open space or window. If you fail to achieve your desired results, then adding some more copper wires to the antenna can help you in extending the connections of the antenna and getting better quality FM radio signal reception.


So, these are some simple steps by which you can easily create an antenna and FM antenna for a stereo receiver. A dipole antenna is the best choice for receiving the radio signals for you.


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