simple calculator circui

An antenna for 7MHz local contacts - This article describes the design of an antenna for local contacts on 7MHz, including a simple and efficient matching system that presents a 50 ohm load to the transceiver.

Open Wire Feed Line a second look - Put up the longest dipole you can fit, feed it with open wire line, connect it to the balanced output of your tuner and—poof! Instant multiband antenna. Is life really that simple? By Paul Danzer, N1II

My Quad Project - My Quad Project. Simple to build in a weekend. 2 Element vertcal polarity. 99 percent off the shelf parts. Light weight.

A Portable Antenna Matching Unit - A small HF antenna tuner project for qrp operations. Includes circuit diagrams pictures and test results by GW4ALG

Balanced Line Tuner - A small Z-Match tuner, BLT, Balanced Line Tuner is a simple Z-Match tuner that works from 10-40 meters

K7NBB - We are a simplex radio club operating on 146.415 out of Reno, Carson City and surrounding areas.

HxPI Radio - First Steps Radio - First steps in science and technology. First steps radio. Color graphics and simple explanations of basic concepts in radio. An introduction to radio communication as a technical hobby. Resources for teaching, training, learning, self-study. Modern morse code. Morse code in the 21st Century. Morse code as a technical hobby. Morse training and practice material. Exercise files to download.

Configuring an Icom ID-1 DSTAR radio - Icom dstar digital data configuration for simplex

D-STAR Callsign Calculator - This is a user-friendly web page based D-STAR call sign calculator that requires no installation or configuration to use.

D-Star Call Calculator - Calculate how to set call signs

M.C. Howard Electronics - Distributor of Common Electronic Components Such As Memory, Integrated Circuits, Discrete Components, Cables And Services. We Also Provide Prom Programming, Simm Manufacturing, Testing And Custom Kitting.

DERF electronics corporation - Distributor of electronic components like diodes Transistors Microcontrollers Microprocessors connectors, switches, relays, integrated circuits, eproms, leds

NJ6N's D-STAR Chat - A simple D-Star keyboard to keyboard chat application for Windows by NJ6N.

D-StarCom - A simple command-line-based program for the exchange of common data between D-Star radios

LCLAYOUT drawing software - Simple inexpensive program that allows L-C filters designed by PCFILT or S/FILSYN which are to be built using air wound inductors and single layer capacitors cut from alumina or duroid substrate materials

WaveCon ProCap - Microwave/ RF Circuit Design and Analysis Software

SimplePTT - You can use this simple application for triggering PTT on your radio via DTR/RTS COM port pins.

Roger Beep - This article describes a simple device to generate Roger Beep tones.

20 Amp power supply - A 13.8 volt 20 Ampere power supply project

Designing Op Amp Audio PreAmplifiers - Design guidelines for Op Amp audio preamplifier circuits by Mike Martell N1HFX

How to desolder components - Learn how to correctly desolder electronic components from printed circuit boards

How to solder - Key facts about how to solder, how to solder wire, how to solder pcb's, and including general soldering techniques and the best ways of making good solder joints for electronic circuits and construction. Includes video

Noise Figure Meter with a Spectrum Analyser - A relatively simple automatic Noise Figure (NF) meter was developed which is using a spectrum analyser as the receiver and logarithmic power detector.

Simple test equipment to build - A field strength meter, a crystal tester and a capacitance meter by Peter Parker VK3YE

Ultra-Simple Oscilloscope - This homemade tube oscilloscope is based on the WaterMan Pocket-Scope 0510A, a 3 tube oscilloscope made in 1946.