However, the circuit works well as a transmitter when I connect an audio jack to the antenna.Attached is my circuit. But I build the circuit and hook the output to a high impedance headphone, no radio reception whatsoever.
SINGLE TRANSISTOR FM RADIO PORTABLE
ere’s a low cost, simple-to-build, portable shortwaveHreceiver. Why isnt my single Transistor FM Radio work My simulation with proteus shows signal at resonance. An oscillating voltage therefore appears at the junction of Ll and CV1. Simple Regen Radio for Beginners By Charles Kitchin, N1TEV Simple Regen Radiofor Beginners Need a simple, fun project possibly for a Scout Radio Merit Badge This project isa great way to introduce kids of any age to electronics and shortwave listening. When the battery is first connected, a brief surge of current flows from the collector to the emitter of Q1, causing an oscillating (i.e: alternating) current to flow back and forth between Ll and CV1. The most important parts of the oscillator are the transistor Q1 and the tuned circuit, which comprises the inductor Ll and the variable capacitor CV1. “This circuit is basically an oscillator which runs at around 100 MHz. This allows a much larger range of frequencies to be transferred in FM and thus the quality of FM transmission is significantly higher than that of AM transmission. The maximum audio frequency transmitted in FM is 15 kHz as compared to 4.5 kHz in AM.
Do the same for the second Magnet Wire, too. Step 3: Make the Coils Wrap the first Magnet Wire around a thick pen or a size AAA battery. Due to the large amplitude of RF voltage is sufficient antenna length of about 5-10 cm. Directly to the oscillator an antenna is connected. It consists of a simple oscillator with silicon planar RF PNP transistor. So here is a basic FM transmitter circuit that contains just a couple of parts and has a long range. Single Transistor VCO FM Transmitter This simple transmitter allows you to broadcast on FM radio band 87.5 - 108 MHz. Ordinarily, we need to make an FM transmitter that is easy to assemble and has a decent range. Step 2: Start Soldering Parts on PCB It takes about 10-12 mins to do this. FM transmitter is a low-power FM radio transmitter that communicates a signal from a sound gadget to a standard FM radio. Date Category Project Tags BC548 / FM Transmitter / PCB / Radio The FM radio transmitter has a 200kHz wide channel. Step 1: The Circuit and Parts 2 More Images Here is the Circuit we're going to make.
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