simple calculator circui

Build a hanging dipole for two metres - Described here is a simple omnidirectional, vertically-polarised dipole for two metres

Transmission Line Calculator - This web page allows you to perform transmission line calculations by using an applet instead of a Smith chart

C-Pole antenna calculator - Based on the original design by Brian Cake, KF2YN this online calculator let you find the correct dimensions for a cpole antenna

Coax Dipole Calculator - An efficient program to calculate dimensions of coax dipoles, or bazooka antennas considering velocity length of different coax cables. Express dimensions in feet/inch and meters/cm. Freeware by VE3SQB

Folding the Dipole - Invented by Heinrich Hertz in around 1886, the half wave dipole is still one of the most simple and practical of antennas and still very much in use today. It consists of a half wavelength long centre fed conductor

Homebrew 6m quad - Homemade quad for 6m band, simple and cheap project by SA7AKE

Bicone antenna - This antenna is a simple double bowtie biconical dipole design. It was designed as a broadband scanner antenna resonant on the 2 meter ham band.

A Simple But Effective Low-Band Base Antenna - A vertical antenna for Six Meters band

Is HF propagation reciprocal - Some test circuits using the ACE-HF System Simulation & Visualization software, about reciprocal propagation on HF bands by NW7US

HF Beam Calculator - A javascipt online calculator for 2 and 3 element beam antennas. Just input frequency and will diplay element dimensions and spacing. Measurements in Feet and Meters by G4VWL

ViPEC Network Analyzer - This program intended for electronic circuit analysis (mainly for Linux). ViPEC is a powerful tool for the analysis of high frequency, linear electrical networks.

QTH Locator - QTH Locator is free Windows program to calculate distances and angles between 2 stations, with a data base to handle and store position data (even usable as a simple logbook) and a lot of graphic stuff to display geographic positions. It is capable to display self-made maps or UIVIEW maps also. by dg4mcb

Great Circle Calculator - A javascript online calculator of bearing and distances by G4VWL

Qucs - Quite Universal Circuit Simulator Priority listing - Qucs, briefly for Quite Universal Circuit Simulator, is an integrated circuit simulator which means you are able to setup a circuit with a graphical user interface (GUI) and simulate the large-signal, small-signal and noise behaviour of the circuit. After that simulation has finished you can view the simulation results on a presentation page or window. Run on Linux.

SvxLink - Echo Link client for Linux and general purpose voice services system for ham radio use. The svxlink server consists of a core that handles the connection to the tranceiver. The core can be configured to act as a repeater controller or to operate on a simplex channel

TANKIT Priority listing - A free design aid for vacuum tube linear RF power amplifiers. Determine plate circuit operating parameters and design pi or pi-L tanks quickly and easily.

ZS1I beacon keyer - This article describes a simple programmable Morse Code Continuous Wave (CW) beacon keyer for HF, VHF, ARDF and tracking beacons

Accurate Inductance Calculator - This page allows you to calculate in the most accurate way high-Q inductor coils.

70 cm Power splitter - A simple accurate power splitter for the 70cm uplink to Oscar 13 by G8EUX

FM Morse Code Keyer - A simple circuit which will generate a 700 Hz tone into any FM transceiver allowing an amateur to practice CW with another amateur on a 2 meter simplex frequency.

500mw CW Transmitter - A very quick and easy way to get on the air is to build a "Michigan Mighty Mite" CW transmitter for 160, 80, 40 or 30 meters. It can't get simpler than this. It has very few parts, costs almost nothing, and it works! Cost estimate $10 by VE6WTF

VK1PK RF Signal generator - 3 to 12 MHz signal generator, simple local signal source

Signal Generation Solution - Build an inexpensive RF signal generator

PSK31 Interface - Fairly simple way to interface a computer soundcard to an HF rig to operate PSK31. This interface also works for SSTV & RTTY, and has been tested with a Kenwood TS-140.

VHF signal generator - a simple VHF signal generator in order to measure the characteristic of low pass filter.