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Last Updated
03/31/2019
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Detailed entries for one subject from the INDEX TO HOW TO DO IT INFORMATION. |
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TRANSFORMER (ELECTRIC) sa HIGH-VOLTAGE GENERATOR sa INDUCTION COIL sa TESLA COIL xx ELECTRIC POWER SUPPLY xx ELECTRONIC COMPONENT xx INDUCTION COIL De-ringing transformers in your audio system. A simple way to make moving coil transformers behave. Tuning power transformers used in audio equipment by fitting a capacitor across the output terminals. Power supply design software. BASIC language computer programs for (1) determining the transformer specifications to meet your DC voltage and current requirements and (2) calculating the DC output voltage and current of a specified transformer when operating a given load. Tip on using brass automotive engine-block freeze plugs to "mechanically ground" the power transformer inside an audio amplifier. Power transformers for audio equipment. An overview of the different types and why you might choose to use each type in audio equipment. Audio uses of transformers. The transmission-line transformer. A simplified explanation of how they work. How to build your own isolation transformers. Some thoughts on broadband transformers. Includes general steps required to make your own broadband RF transformers that will minimize the loss in transformer-coupled circuits. Some practical aspects of toroids. How to wind and use toroidal and balun-core inductors and transformers. Home-brew isolation transformer will protect you and your test equipment while you service and repair electronic appliances. This device isolates the chassis of equipment being serviced from the AC line. Cost savings come from modifying transformers taken from discarded microwave ovens. Est. cost: $25. How to drop a battery voltage. Explanation of audio transformer. Simple transformer wound on a large carriage bolt. Servicing and identification shortcuts that will help identify unmarked transformers. Easy way to test transformers, coils, chokes, motors, ... (almost any device containing a winding). Build an isolation transformer to protect yourself and your equipment when you service electronics. Tips on replacing a burned-out transformer when you don't know the voltage values. Simple set up to perform a ringing test on a coil (inductor) or transformer of any type using a square wave generator and an oscilloscope. Transformers, their theory and uses. New basic course in electricity and electronics. Transforming AC. How a transformer works. Custom build transformers by rewinding common voltage units to produce the needed output. Instructions and formulas for unwinding and rewinding. Basic course in electricity and electronics. Understanding transformers. How to build your own isolation transformer to avoid shock hazards when working on old radios where one side of the power line is attached to the chassis. Basic circuits for using variable voltage transformers to do troubleshooting of old time radios. How to rewind antique radio transformers. Transformer hunting. How to check a used transformer with a continuity meter before purchasing. Tips on determining the characteristics of an unknown transformer. List of audio output transformers and audio interstage transformers currently in production along with their costs and specifications. How audio transformers work. Aspects pertaining to primary and leakage inductance, winding capacitance and how they react with tube impedances and other circuit elements are discussed. Electrical adjustment in fitting a new output transformer to an audio amplifier. Output transformers. A simple explanation of the matching process and of all the factors that control the frequency response and the distortion introduced by an output transformer between a loudspeaker of low impedance and the output vacuum tubes in an audio amplifier. Part 1. Output transformers. Part 2. Quick, simple output tests for transformers being used in vacuum tube audio amplifiers. The snubber. An inexpensive circuit to improve the fidelity of common output transformers by damping out oscillations (ringing) found at the beginning of square waves at the speaker terminals. Transmission line audio transformers. An overview of techniques and benefits of tandem bifilar-wound TL (transmission line) transformers. Measuring output-transformer performance (both low and high frequency) and how it affects tube amplifier quality. Brief overview for laymen about the factors considered in tapping output transformer (OPT) primaries. Advice on using less expensive 4k-ohm center-tapped transformers in place of 8k-ohm units in a Sansui stereo receiver/amplifier with 7189A output tubes. Operational differences between using an output transformer with 40% U/L taps and one with 21% U/L taps in the same audio amp circuit. Build a transformer polarity test box to check polarity before hooking up the transformer. Safe transformer sleuthing. This current-limiting circuit combined with a Variac provides a safe way to track down the primary leads to a transformer. Method for determining the impedance of tube-type output transformers. Electronic fundamentals. Inductors and transformers. Isolate yourself from electricity and stay alive. Build an isolation transformer to "lift" the AC power line off ground and convert it to a floating-AC power system. This greatly reduces or eliminates the chances of your body forming an electrical path from an AC circuit to the ground. Salvaging an autotransformer (Variac). Modify an older variable transformer (0- to 140-volts AC) to control lamps, test electrical equipment, etc. Transformer theory. A service guide to troubleshooting transformers in electronic gear. Schematic for an autotransformer that can raise or lower AC line voltage by 5 or 10 volts. Isolation transformer circuit features 120-volt amperes with taps spotted at 24 volt intervals. Est. cost: $9. Tips on making a variable voltage transformer (AC bench supply) more versatile. Four building-block power supply circuits. Two transformer-rectifier units, a series regulator and a shunt regulator. Solid-state variable transformer uses a triac. Handles up to 360 watts. Est. cost: $8. DC transformer accepts 3 to 15 volts DC input and delivers from 80 to 425 volts DC output. Winding your own non-standard audio output transformers. Design of transmission-line transformers. How coreless transformers can be made from coaxial transmission line. How to add a simulated center tap to the secondary of an existing transformer without rewinding it. Low-cost power supplies from recycled AC adapters. How to check out and utilize AC adapters (transformers) formerly used to power radios, calculators, shavers, etc. Winding your own adjustable tuning coils. How to make your own slug-tuned variable inductors, RF transformers, and IF transformers. Boost AC line voltage with this autotransformer made from a plain power-supply transformer. Make an isolation transformer to provide power to a device while isolating it from the AC line, thus preventing accidental grounding while performing electrical repairs. All about toroidal transformers. Learn about the important advantages toroidal transformers have over other designs, and how to use them. A collection of troubleshooting circuits. (1) Voltage testers. (2) Polarity indicator. (3) Continuity tester. (4) Transformer tester. (5) Meter resistance tester. (6) Intermittently-open circuit tester. Tips on testing an unknown flyback transformer which will be used in a high-voltage power supply. Transformer features interchangeable secondary writing. The right way to wind toroids (toroid transformers) for use as RF chokes. How to find a replacement transformer for an electronic device without a schematic. How to determine the DC voltage and current drawn in order to select a replacement that will work in the circuit. How to determine the voltage and current rating of unmarked transformers. How to rewind transformers. Tips on identifying leads on a power transformer. Antique radios. Troubleshooting ancient transformers, tubes and speakers. Linear voltage differential transformers, a special kind of transducer. How they work and typical applications. | |||||||||
Copyright © by Norman Lathrop Enterprises. All Rights Reserved. No part of this publication may be reproduced, stored in a retrieval system or transmitted, in any form or by any means (electronic, mechanical, print photocopying, recording or otherwise) without the prior expressed permission of Norman Lathrop Enterprises, except as permitted by law. |
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