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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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IMPEDANCE MATCHER sa ANTENNA TUNER x Z MATCHER xx ELECTRONIC COMPONENT xx IMPEDANCE & IMPEDANCE TESTING xx MICROPHONE ACCESSORIES Super buff. This tape monitor buffer is used to mate hostile impedances and keep distortion from leaking into your tape output. Buffer. Provides a wideband high-Z (high-impedance) input and low-Z (low-impedance) output. Features unity gain and plenty of drive capability for any load (such as high capacitance cables). A balanced line design. Send and receive modules to convert unbalanced signals to balanced and back again. Can be built to incorporate gain if required and to match any reasonable impedance. Enhanced audio quality on transmit. (1) Circuit for a simple microphone step-down impedance matcher for using a 50K ohm microphone with a modern transmitter that has a 600 ohm microphone input circuit. (2) Microphone selection. (3) Microphone amplifier circuits with bass and treble boost circuitry. (4) Speech processing, etc. A catalog of practical circuits. Part 1. (1) Audio amplifier. (2) Microphone Z matcher. Impedance. How to hook anything to anything. One-transistor amplifier will match low-impedance microphones with high-impedance equipment. Audio system integration. A knowledge of impedance matching and an understanding of spec sheets will help you integrate a high-quality public address system. A solid-state microphone transformer. Construction of a two-stage, direct-coupled, operational amplifier to match low impedance amplifier inputs. This battery-powered unit is almost noiseless. Circuit designed to match a low-impedance microphone to a tube-type public address amplifier requiring a high-impedance input. Basic building-block circuits are made from the same low-cost IC, the LM324 quad op-amp. (1) AC voltage-follower. (2) Inverting amplifier. (3) Buffer amplifier. (4) Squarewave generator. (5) Instrumentation amplifier (formed by combining the above four circuits). Build an adapter box to interface a sound motion picture projector (or a radio, stereo, phonograph, etc.) to a public address system. Est. cost: $20. Impedance-matching preamp that will allow you to use an old crystal microphone with a transmitter, PA system, or tape recorder. High-input-impedance to low-output-impedance converter circuit. Simple single-transistor circuits. (1) Voltage regulator outputs 6-volts DC. (2) Constant-current output. (3) Simple audio amplifier. (4) Impedance-matching circuit. (5) LED-control circuits turn either off or on in the presence of a DC voltages from 5- to 9-volts. (6) Relay-driver circuit has a latching feature that keeps the relay on once energized. Preamp circuit provides a transformerless match for low impedance microphones and can drive most system amplifiers. Computer-designed audio networks. BASIC program eliminates the hard work in designing impedance-matching networks and attenuators for audio systems. "Transi-Match", a one-transistor circuit whose sole function is to match a very high impedance to a very low impedance. Est. cost: $4. | |||||||||
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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