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TX-500 500mW FM Transmitter – Circuit Schematic
TX-500 500mW FM Transmitter
The TX500 is a simple to build 500mW FM Transmitter. It consists of three blocks; modulator / oscillator, two stage 500mW VHF amplifier and LED based power mete...
TX-300 300mW FM Transmitter – Circuit Schematic
TX-300 300mW FM Transmitter
The amplifier has exactly the same architecture as TX500 with the difference that TX300 has only one stage variable VHF amplifier. It is a cute schematic that w...
Camera VHF Video Transmitter – Circuit Schematic
Camera VHF Video Transmitter
This is a simple video transmitter that can transmit as far as 50 meters. This video transmitter can be used with the camera or other video sources. You can vie...
AM Radio built around LM555 – Circuit Schematic
AM Radio built around LM555
AM radio built around 555 timer chip. The only active device (silicon, germanium, or otherwise) is the LM555. The tuning is accomplished with an inductor and a ...
50mW BH1417 Stereo PLL FM Transmitter – Circuit Schematic
50mW BH1417 Stereo PLL FM Transmitter
This is an excellent Hi-Fi Stereo PLL FM Transmitter, the audio source can be the computer, sound card, game consoles, CD, DVD, MP3, stereo mixer for stereo aud...
500mW Broadcast FM Transmitter – Circuit Schematic
500mW Broadcast FM Transmitter
This little broadcast FM transmitter has 500mW of RF output power and runs of 12-15V battery or power supply. DC whose signal modulated by FM using four transis...
2 Watt FM Transmitter – Circuit Schematic
2 Watt FM Transmitter
This 2 Watt FM transmitter will provide 10km range in good weather conditions. Use dipole antenna for maximum range. Transmitter can be tuned between 88-108 MHz...
1Watt AM CW Transmitter for 10 Meterband – Circuit Schematic
1Watt AM CW Transmitter for 10 Meterband
In this project, you will make a simple 3-stage low-power broadcast-type circuit, using a crystal oscillator integrated circuit and an a collector modulated AM ...
1W Long Range FM Transmitter – Circuit Schematic
1W Long Range FM Transmitter
Long range, very stable, harmonic free, FM transmitter circuit which can be used for FM frequencies between 88 and 108 MHz. With good antenna transmitter can co...
1W FM Transmitter – Circuit Schematic
1W FM Transmitter
A very good 1 watt fm transmitter circuit, very easy to build circuit. It has 4 transistors, one is a very stable oscillator, followed by a buffer stage to prev...
1 Watt Universal RF Amplifier – Circuit Schematic
1 Watt Universal RF Amplifier
This is a universal 1 Watt RF class C amplifier that is ideally suited for low power FM transmitters. Input should be at least 100mW to achieve 1W output. It is...
100W Transmitter RF Power Amplifier 2SC2782 – Circuit Schematic
100W Transmitter RF Power Amplifier 2SC2782
This is a 6m band transmitter RF power amplifier (50 MHz) with 100W output. It used with my FT-736R and drive from 10W for the 6m SSB DX. The Building informati...
1.5V Tracking Transmitter – Circuit Schematic
1.5V Tracking Transmitter
With this circuit you can build a very small tracking transmitter that can be tracked using a FM broadcast band radio receiver. The transmitter can be powered f...
Simple FM transmitter circuit – Circuit Schematic
Simple FM transmitter circuit
A lot of FM transmitter circuits have been already published here. This just another one, a simple two transistor FM transmitter. The first stage of the circuit...
SDR Transforms Amateur Radio – Circuit Schematic
SDR Transforms Amateur Radio
Software-defined radios (SDRs) are used in all areas of communications including ham radio and SWL...
LM/MW converter for ham-only receivers – Circuit Schematic
LM/MW converter for ham-only receivers
Before the advent of broadband communications receivers with synthesized oscillators, high-grade, hamband receivers used crystal oscillators and a variable IF t...
Counter Demodulates Narrowband FSK Without Synchronization – Circuit Schematic
Counter Demodulates Narrowband FSK Without Synchronization
Frequency shift keying (FSK) is a popular digital modulation technique for data transmission. Some common applications of FSK modulation include both wired and ...
Low-Cost Prototyping For VHF Circuits – Circuit Schematic
Low-Cost Prototyping For VHF Circuits
Below 10 MHz, the realization of engineering models is fairly straightforward and not critically dependent on pc-board layout. At VHF, parasitic circuit element...
FM IF MW radio receiver circuit using LA1260 IC – Circuit Schematic
FM IF MW radio receiver circuit using LA1260 IC
A very simple FM IF MW radio receiver circuit can be designed using the LA1260 IC manufactured by Sanyo Semiconductor . As you can see in this FM IF MW radio re...
RF-Radio Frequency 6 – Circuit Schematic
RF-Radio Frequency 6
This circuit can be designed to attenuate signal frequency. Customizable from 1 to 40 dB. If you want to use the band uhf, should be fitted within the frame shi...