RF Test Circuits
#RF
#test circuits
#frequency measurement
#signal generator
#transmitter
#receiver
#antenna
#RF amplifier
#spectrum analyzer
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Tuned radio frequency receiver
A tuned radio frequency (TRF) receiver is a radio receiver typically consisting of multiple tuned radio frequency amplifiers followed by circuits for detecting and amplifying the audio signal. A three-stage TRF receiver includes an RF stage, a detector stage, and...
wireless headphones transmitter
This wireless headphone transmitter ensures a reliable connection over a distance of 2 meters. The oscillator frequency ranges between 1750 KHz and 3500 KHz, utilizing a ferrite bar as the antenna. IC1 amplifies the audio signal, while TC1 serves as...
RF field strength meter
A simple Field Strength Meter consists of a small antenna, a detector diode, a resistor, a capacitor, and a micro ammeter. This circuit is sensitive enough to detect HF fields when positioned close to the transmitting antenna. The circuit functioned...
Wide Dynamic Range Field Strength Meter
A field strength meter is a useful tool for locating a transmitter. However, a sensitive field strength meter has limitations: it responds to nearly any RF signal entering its input. This characteristic reduces the effective sensitivity of the field strength...
McCoy Mighty Midget Transmitter
The circuit employs a 6GW8 triode-pentode in an oscillator-amplifier configuration that demonstrates an unconventional application of oscillator principles, coupled with a lack of attention to amplifier stability concerns. Consequently, this transmitter should not be replicated or operated without significant modifications...
AM RF Amp for Internal Antennas
The author described assembling this circuit on a 1"*1" perf board, I actually laid out a small PC board with excellent results. In this era of surface mount components, I think a much smaller version can be laid out on...
ZS100 Connection Signal
The following circuit illustrates a Noisy Regen Receiver Circuit Diagram. Features include its application in model remote-control systems and its operation as a 27-MHz superheterodyne receiver.
The Noisy Regen Receiver is a type of radio receiver that utilizes regenerative feedback to...
AudioWave 2.0
With AudioWave 2.0 your soundcard becomes a comfortable LF-signal-generator, which produces signals from 1Hz to 20 kHz with a resolution of 1 Hz. Phase shift between left and right channel is adjustable from 180° to +180° and an attenuator can...
tv transmitter circuit
Here is a simple schematic of a TV transmitter circuit, or video transmitter circuit, capable of broadcasting in the VHF range from 60 to 200 MHz. The input video source can be any CCD camera or VCR. The output power...