Swr Bridge circuit | Next Electronics

A field strength meter utilizing a biased Schottky detector employs a temperature-compensated Schottky diode within an amplified, untuned field strength indicator powered by two AA cells. This device indicates the relative field strength of RF fields ranging from a few...

RF Actuated Keying Monitor

Sending Morse on a rig without a sidetone is not impossible, but is not particularly pleasant either. This battery-powered monitor has been designed to provide an audible indication of keying for those whose rigs lack a CW sidetone. Its sensor...

A8V W8EXI 6CL6 One Tube Transmitter

A8V W8EXI 6CL6 One Tube Transmitter. The operation of the 6CL6 transmitter is actually quite sophisticated. The A8V W8EXI 6CL6 One Tube Transmitter is a compact and efficient radio frequency (RF) transmitter that utilizes a single 6CL6 vacuum tube for its...

Shorty Forty Antenna

City dwellers and other flat dwellers know the practical difficulties they encounter when they try to put up an antenna for 40 meters. Finding space enough to accommodate 67 feet of wire is a real problem for them and most...

Antenna Circuits / Schematics

This document presents plans for a simple ground plane antenna that is effective in the FM band (88-108 MHz). It is constructed from a small plastic disk. The 6 x 6 loop antenna, designed by Graham Maynard, is highlighted as...

Sensitive RF Voltmeter Probe

Sensitive RF Voltmeter Probe Circuit. This circuit measures RF voltages beyond 200 MHz and up to about 5 V. PARTS LIST: R1 - 4.7 MΩ, R2 - 1 MΩ, R3 - 1 MΩ, R4 - 100 kΩ, R5 - 330...

Grounded Grid Amplifiers

Floating the grid above ground is detrimental for RF performance and arc protection. The connection of the control grid to ground is critical for stability. It is essential to keep the grid connection to ground as wide and short as...

RF Decibel Meter

This is a zine dedicated to electronics circuit diagrams, DIY (do it yourself) electronics projects, electrical electronics data sheets, and microcontroller projects for hobbyists, students, consultants, and product designers. The zine serves as a comprehensive resource for individuals interested in electronics,...

RF Field Strength meter

As I used this probe last night to determine if a 384 MHz oscillator was really working or not, I remembered an email I received a while ago, asking how to make a field strength indicator without the microcontroller. Thus...