The early radio transmitters were so large and bulky that they took up a lot of space. The circuits are primarily designed with large-sized valves.

With the introduction of semiconductor materials such as transistors, electronic equipment is being miniaturized to the point where small transmitters are becoming useful and compact.

As a result, we chose to design a complete radio broadcasting equipment that is compact and contains semiconductor materials.

The system units are divided into two types: An audio console for musical processing and mixing is essentially a condenser microphone.

The center frequency is provided by the transmitter unit. All of these were designed to be compact and small. This project is intended to help a specific group of people. Using a small and compact radio broadcasting equipment with a power watt of one watt, a community of one kilometer in radius should be comfortably covered, and the audio production should be very clear, as opposed to the common noisy FM microphone project.



High power amplifiers are usually quite expensive and out of reach for most audiophiles (and Hi-Fi enthusiasts), who must settle for those small 6 watt amplifiers. Things should change now that we’ve been introduced to us and to electronics. This low-cost Hi-Fi amplifier produces ear-splitting and thunderous output of an incredible forty watts. This circuit’s distinguishing characteristics are.

vLow cost – The primary criterion

vSmall size

Very low transient noise and THO on “power on”

Bass and treble controls that work

In the event of overheating, the automatic thermal shut down system turns off the amplifier.

vLoad damp protection is pre-installed.

The circuit employs the LA 4440 high power amplifier chip. The circuit is made up of It’s self-explanatory. A small value capacitor couples the input. The output is routed to the speaker via a block terminal.


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