MK484 Portable Receiver circuit

The purpose of this circuit is for research and education. Assistance is sought in acquiring components for simple RF circuits, as well as tutorials or schematics. The requester is facing challenges in locating quality resources for beginner-level RF circuit building...

High Performance Regen Receiver

A new high-performance regenerative receiver is available as a kit. The inclusion of an innovative regenerative detector circuit enhances sensitivity and overall performance. The regenerative receiver kit is designed to provide users with a high-quality radio frequency (RF) reception experience. The...

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...

GBPPR 1 GHz RF Spectrum Analyzer

An RF spectrum analyzer is an essential tool for experimenters. The spectrum analyzer project described here is an enhancement of the "Spectrum Analyzer for the Radio Amateur" (Part 2) project by Wes Hayward (W7ZOI) and Terry White (K7TAU), which appeared...

Sensitive RF Voltmeter Probe

Sensitive RF Voltmeter Probe Circuit. This circuit measures RF voltages beyond 200 MHz and up to approximately 5V. The sensitive RF voltmeter probe circuit is designed to accurately measure radio frequency (RF) voltages in the range exceeding 200 MHz, with...

Bandswitched Grid Dip Meter

This circuit is designed for checking resonances in tuned circuits, antennas, and similar applications, covering a frequency range of 2 to 20 MHz. Q1 acts as an oscillator that can be tuned across this range using capacitor C1 and band-switched...

REGENERATIVE_SHORTWAVE_RECEIVER

The receiver consists of multiple subassemblies, including an active antenna, an amplifier featuring regeneration control and band-switching circuitry, an AM detector, a power amplifier, and an output device such as an internal speaker, external speaker, or headphones. Additionally, it is...

Radio Frequency Circuits

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IC AM radio circuit

The receiver input circuit is powered by a 60Ω generator. A low-pass filter is employed to permit the entire frequency range while maintaining uniform sensitivity. The receiver input circuit is coupled with a transmitter inductive component (Ri = 60Ω). Additionally,...