Active Antenna Amplifier For FM Radio

Active Antenna Amplifier For FM Radio
This is the circuit diagram of active antenna amplifier for FM radio device. With only a small handfull of parts you can built this trusty FM Amplifier to boost the signal from the radio transmitter. The circuit works with only 1 UHF/VHF type transistor, MFE201. This amplifier will pull in all distant FM stations clearly. The circuit is configured as a common-emitter tuned RF pre-amplifier wired around VHF/UHF transistor MFE201. There are a couple other models that probably would

400 Watt 70 Volt Amplifier

400 Watt 70 Volt Amplifier
This is the schematic design of 400 Watt 70 Volt amplifier capable to deliver about 400W RMS power output in single channel. The component part list, PCB layout design and component placement layout is provided in this post. The power supply module already included ini the PCB design. The components are easily found in market. This circuit is using 8 transistors of 2SC5200 mounted in PCB, the heatsink is required and should be mounted in the power transistors to

1000W Stereo Audio Amplifier with Transistors 2SC5200 and 2SA1943

1000W Stereo Audio Amplifier with Transistors 2SC5200 and 2SA1943
This is the circuit design of 1000W stereo audio amplifier. It is a very good design to assemble, easy to build from your board to the acquisition of components, the output transistors are the COMPLEMENTAR 2SC5200 and 2SA1943 relatively cheap and with very good result. In the power supply module we have 6 capacitors 4700uF/80v or more and one 50A bridge rectifier diode, this design can be in versions mono (500 Watts) or stereo (1000 Watts), if it is

150W Car Audio Amplifier

150W Car Audio Amplifier
This is the circuit design of 150W car audio amplifier. The circuit is divided in two block diagrams: The tone control circuit and power amplifier circuit. Tone Control for 150W Car Audio Amplifier The tone control circuit build based on IC LF353 In stereo mode, we shall have the action of eight loudspeakers which are going to create a very important sound pressure. Tone Control Scheme (more…)

21W Class AB Audio Amplifier

21W Class AB Audio Amplifier
This is the circuit design of 21W class AB audio amplifier uses power transistors as the main part. It is a simple design, and simple to set up. Set the 10k trimmer to about half way and the 470 ohm trimmer to 0 resistance. Power up and set the quiescent current to 30mA by trimming the 470 ohm trimmer. Once done, measure the offset voltage. Trim the 10k so that between -30 and 30mV is measured. The amplifier should