Medium range transmitter
#transmitter
#RF
#medium range
#wireless communication
#signal transmission
#antenna
#radio waves
#electronics
#communication
#broadcast
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RF oscillator circuit (2N3904)
This basic RF oscillator circuit is easy to build and the components are not critical. Most of them can be found in your junk parts box. The L1 antenna coil can be made by close winding 8 to 10 turns...
wave antenna circuit
The circuit illustrated here demonstrates that, despite advancements in components and technology, it remains possible to design effective and intriguing circuits. This design utilizes two well-known transistors, the BF256C and the BF494. Along with the necessary resistors and capacitors, these...
Active Antenna for Medium Wave
This circuit is designed to amplify the input from a telescopic whip antenna. The preamplifier is intended to operate within the medium waveband, covering frequencies from approximately 550 kHz to 1650 kHz. The required tuning voltage ranges from 1 to...
RF Dummy load
The load described here is capable of handling up to 10 watts of RF power for a couple of minutes and is designed for the widely used 50 ohms impedance. It consists of ten parallel connected 560 ohms 1 watt...
LED RF Signal Strength Meter
RF Signal Strength Meter circuits are popular RF measurement devices. This circuit is one of the simplest but very useful circuits that satisfies your desired accuracy. The heart of measurement is high accuracy but easy to use Logarithmic Detector AD8313...
Antenna Combiner
The Antenna Combiner (A3021) is an active combiner designed to accommodate four 50-ohm coaxial antenna connections. It combines the signals from these four inputs, resulting in a net gain of approximately +11 dB. The A3021 is specifically intended for use...
Atv Jr Transmitter 440Mhz Circuit
This low-power video transmitter is designed for remote control (R/C) applications, surveillance, or amateur radio purposes. It utilizes seven transistors within a crystal oscillator-multiplier RF power amplifier chain, along with a high-level video modulator. A supply voltage of 9 to...
14W CW TRANSMITTER
A low-power two-stage FET transmitter designed for the 80-meter amateur band utilizes a Pierce crystal oscillator that does not require an output resonant circuit. A DC milliammeter can be connected across a 150-ohm resistor in the gate circuit of the...
RF Digital Wattmeter
The power is measured by the circuit AD8307 over a 50 ohm dummy load. An A/D converter of 12 bit converts the analog output from the AD8307 to a digital number. Since the AD is a 12 bit A/D, you...