In most cases, you use transistors (and/or tubes) to amplify the RF signal from the transmitter . Sometimes, the least expensive way to increase range is to use a bigger antenna, a higher antenna, a more efficient antenna, or a directional antenna.
In most cases, you use transistors (and/or tubes) to amplify the RF signal from the transmitter . Sometimes, the least expensive way to increase range is to use a bigger antenna, a higher antenna, a more efficient antenna, or a directional antenna.