In this tutorial, we are going to demonstrate to you an FM Antenna Booster. Low-powered FM transmissions are hard to get by common FM antennas. To build the receiving capacities of the receiving wire, include this DIY booster to the radio wire. You can make this booster easily. Only a few hardware you can buy from a hardware store or an electronics provider – no specific electronic hardware required. A couple of regular household apparatuses require as well. This is a low-cost FM antenna booster utilized to tune in to programs from distant FM stations.
Together with a good directional antenna, this elite two-stage antenna amplifier for the VHF FM broadcast band will empower you to get far off radio broadcasts. VHF FM Antenna will likewise definitely improve the receiving capability of FM signals. The antenna booster is likewise incredible for expanding the transmission range of low-power VHF/FM transmitters.
Hardware Components
The following components are required to make FM Booster Circuit
| S.No | Components | Value | Qty |
|---|---|---|---|
| 1 | Transistor | 2N3904 | 2 |
| 2 | Antenna | – | 1 |
| 3 | Coils | 1½ turns | 2 |
| 4 | Resistor | 2.2K, 220K | 2, 2 |
| 5 | Ceramic Capacitor | 5pF, 30pF, 10µF | 1, 3, 1 |
| 6 | Variable Capacitor | 4-65pF | 2 |
| 7 | Battery | 9V | 1 |
2N3904 Pinout
For a detailed description of pinout, dimension features, and specifications download the datasheet of 2N3904
FM Booster Circuit
Circuit Operation
The following is a schematic of a tunable FM antenna booster or FM antenna circuit which utilizes to enhance distant radio signals. The circuit is utilizing two transistors to expand the signal gain to a satisfactory level. The transistors are universally useful 2N3904. The circuit is utilizing two tunable tank circuits. L1 and L2 are 1½ turns of #20 enameled wire rolled on a 3/8″ diameter mandrel. Use rabbit ears radio wire or another great FM antenna apparatus as an input.
Voltages at Test Points = (TP1) = 0.68V
(TP2) = 3.85V
(TP3) = 0.66V
Applications
This FM antenna booster circuit utilizes to listen to the programs from distant FM stations.
