Ian Purdie VK2TIP's Electronics Tutorials

Electronic Basics

Radio Terminology - learn the basics, learn what's what! get a basic understanding of all the major terms used in ham radio and electronics

Basic Electronic Units - learn the basics of those important components Inductance, Capacitance and Resistance

Radio Basics - learn the basics at the necessary level to follow the later advanced topics. Begin to understand LC, reactance, impedance, even Q and other important basic concepts. Includes a great Javascript LC calculator written to work out L or C from resonant frequency!

Resistor color code - yes the much sought after color code chart.

Active Antennas

Active Receiving Antennas - a discussion on some of the principles and justifications behind the design of active receiving antennas for radio projects.

Antennas

Antennas, some rules of thumb for beginners - Every now and then somebody asks for antenna suggestions. Quite often these people asking about antennas are beginners who are afraid of making the wrong choice - a contibution on antennas by James R. Duffey KK6MC/5.

Amplifier Design

Amplifier design - Part 1 - learn how to design both a.c. amplifiers and r.f. amplifiers

Amplifier design - Part 2 - amplifiers using emitter degeneration

Amplifier design - Part 3 - amplifiers using emitter degeneration AND feedback

Buffer Amplifier design - to buffer low level stages before succeeding amplification

Small Signal Amplifier design - to follow the buffered low level stages before power amplification

Baluns and Mixers

Balun design - an electronic tutorial discussing baluns

Double Balanced Mixer design - an electronic tutorial on double balanced mixers

Filter Design

L.C. Filter design - a comprehensive electronic tutorial for everybody into ham radio or the electronic hobbyist

High pass LC filter design - learn how to design high pass LC filters - Part 1

Low pass filter design - the basis of many other filters

Band pass filters for many purposes

Multi-pole narrow band pass filters

I.F. Amplifier filters as designed in the olden days

Oscillators

Design of RF Oscillators - a discussion on some of the principles and justifications behind the RF design and construction of radio frequency oscillators

Design of Voltage Controlled Oscillators - a discussion on some of the principles and justifications behind the design of voltage controlled oscillators or VCO's.

Design of Crystal Oscillators - a discussion on some of the principles behind the design of crystal oscillators or VXCO's.

Power Supplies

Power Supply - 1 - a tutorial on the basics of designing simple power supplies for radio projects.

Power Supply - 2 - regulation of power supply voltages.

Power Supply - 3 - designing with solid state regulators as well as using higher current regulators.

Power Supply - 4 - a bench variable voltage power supply project for you to construct at home.

Receiver Basics

Radio Receivers - the fundamentals of radio receivers

A.M. Radio design - the basics of a.m. radio design Part 1

A.M. Radio design - the basics of a.m. radio design Part 2

F.M. Radio design - the basics of f.m radio design Part 1

F.M. Radio design - the basics of f.m radio design Part 2

A basic old time crystal radio set - basic crystal radio set but includes a lot of design information

a reflex radio receiver circuit - out of fashion now but here are the principles, design information and schematics

Radio Projects

Radio Telescope - In response to some considerable interest I have posted a project for you to construct a 30 Mhz radio telescope.

Passive Antenna Re-radiators - Again in response to some considerable interest I have posted some project ideas for receiving difficulties for you to construct passive antenna re-radiators or "sort" of Q multipliers.

Test Equipment

LC Meter Project and Kit - Now you can easily build a quality inductance and capacitance meter (LC meter project). Ideal for any serious constructor - designed by Neil Hecht of AADE.

Square Wave Signal Generator - Build a basic first class electronic hobbyist test instrument - ideal for trouble shooting. Includes a how to use guide. Excellent beginner project to start your collection of amateur-radio-equipment.

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