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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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TRANSISTOR TESTING xx ELECTRONIC TESTING xx SEMICONDUCTOR TESTING xx TRANSISTOR Audio servicing and the amateur. Part 3. Transistor testing. Circuit for measuring beta directly in order to find a matched set of NPN and PNP transistors. Tips on testing Hitachi power MOSFETs. A simple curve tracer. Used for checking transistor characteristics (hFE value, input values, temperature dependence, etc.). Part 1. A simple curve tracer. Part 2. Setup procedure and use. R.F. power transistors and amplifiers. Part 2. Test setup for servicing power transistors and RF amplifiers. Build a wide range combination crystal and transistor tester. Will test most common transistors and fundamental mode crystals from 100 kHz to at least 20 MHz. 12 steps in transistor replacement. Part 1. A two-part course in transistor troubleshooting and replacement. 12 steps in transistor replacement. Part 2. Knowing how the Hickok Model 216 "automated" transistor tester works may help in designing your own tester. Build a quick and easy curve tracer to test components. Used in connection with an oscilloscope to check diodes, thyristors, transistors, resistors, capacitors, etc. Correct use of voltmeter on transistors and diodes. A $2 transistor tester. Transistor checker for PNP or NPN. Est. cost: $2. A transconductance bridge to test field-effect transistors. Low-cost transistor tester can measure DC again and leakage current. Tests all bipolar silicon and germanium devices. Simple polarity detection and a high degree of accuracy. Quick-test component tester. Use it to find bad components (capacitors, resistors, diodes, transistors, SCR's, and other bipolar junction devices) either in-circuit or out-of-circuit. Used in conjunction with an oscilloscope. Q-Sort. Device to test and sort bipolar-junction transistors (BJTs). Est. cost: $20. Versatile transistor tester is battery powered. Checks gain, leakage, and breakdown voltage of small-signal and power transistors. Transistor curve tracer. An instrument which produces on a scope a definitive family of characteristic curves that can be measured and interpreted to derive principal parameters for most transistors. Est. cost: $50. Transistor curve tracer will show the characteristics of junction and field-effect transistors on an oscilloscope. Troubleshooting FET circuits. Portable, multi-range transistor checker. Measures beta on 2 ranges at 2 different collector power levels. Also checks for opens, shorts and leakage of transistors and diodes. Est. cost: $20. Oscilloscope adapter permits displaying the characteristic curves of any transistor or FET. Transistor testers determine type (NPN or PNP), open, leakage, beta (DC current drain), and applications (power or voltage). Use a multimeter as a transistor/diode tester by properly interpreting the meter readings. Digital diode tester indicates the anode or cathode of an unknown diode and also tells you if a transistor is NPN or PNP. It will detect bad transistors and diodes. Est. cost: $20. Transistor tester can indicate type of transistor defects, material and polarity of unknown transistors, gain (beta) measurements, and leakage test. LED-indicating tester will identify leads and test many transistors for opens and shorts. Est. cost: $5. Transistor tester works both in and out of circuit. Also determines transistor type, either NPN or PNP. Est. cost: $1. PN junction tester is used with a VOM for checking PN junctions of diodes or transistors in or out of circuit. The semiconductor tester you already own. How to use a VOM to test diodes and transistors. Low-power semiconductor tester checks two- and three-legged solid-state devices, plus SCR's. Modification for testing higher-powered transistors, SCR's, and diodes is also shown. Transistor Tester is so uncomplicated that it could be permanently mounted to a PC or perfboard. Simple go/no-go transistor checker circuit. Circuit to test the condition of LEDs, diodes, and bipolar transistors (both power transistors as well as low power types). Build a CoCo testlab. How to use a Radio Shack Color Computer to test ICs, transistors, diodes, and capacitors. Testlab is a hardware/software system. It consists of a build-it-yourself plug-in board and BASIC programs. No need to modify the actual computer. Instructions for using a Commodore 64 computer are also included. Part 1. Fabricating the printed-circuit board. Build a CoCo testlab. How to use a Radio Shack Color Computer to test ICs, transistors, diodes, and capacitors. Part 2. How to use the testlab. Includes listing of the IC Tester program and Capacitance Meter program, both written in BASIC. An in-circuit component tester. Simple oscilloscope accessory speeds up in-circuit testing of resistors, capacitors, inductors, and transistor and diode junctions. A tester for transistors, diodes, and SCRs. An in-circuit transistor tester. A low-cost bench/portable instrument for testing bipolar transistors in- and out-of-circuit. Est. cost: $20. Variable-load box and power-transistor tester. Lets you check the regulation and set current limits of your DC power supply. Also checks the operating condition of npn and pnp bipolar power transistors. Circuit to check low-power transistor DC gain. Transistor checker circuit used to determine beta values at various portions of the response curve. Breakdown reverse voltage transistor and diode tester. Nondestructive "one-shot" oscilloscope technique to reveal several characteristics at once. NGW transistor tester. This unit will check almost any transistor (or semiconductor diode) for interelement shorts, opens, and leakage. It will test transistors for gain and tell if the transistor is npn or pnp, and whether it is silicon or germanium. Est. cost: $10. Test transistors with an adapter for vacuum tube voltmeter. Est. cost: $6. Circuit for a simple transistor tester. Est. cost: $1. Circuit for a transistor tester which is basically a modified Hartley oscillator. How to test for damage to metal oxide semiconductor field-effect transistors (MOSFET). Semiconductor test set can be used with any type of diode or transistor to tell if it is working. Polarity and excessive current problems are avoided. Simple transistor sorter tells the application categories (audio, IF, HF, etc.) of unmarked transistors. Used with a grid-dip oscillator. Tester for unijunction transistors measures resistance ratio and the interbase modulated current. Semiconductor breakdown tester. Will check all diodes and transistors up to 300 volts (except MOS field-effect transistors). Used in conjunction with a voltmeter. Non-destructive tester will check NPN or PNP transistors and diodes. Transistor junction tester. Bulb lights to indicate type (NPN or PNP) and also indicates if unit is shorted or good. Simple audio generator circuit can also be used as a code-practice oscillator or audio transistor tester by substitution. Transistor Osci-Tester tests junctions, audio-frequency oscillation, radio-frequency oscillation, shows if it is NPN or PNP, and whether silicon or germanium. Semiconductor junction tester checks bipolar transistors or diodes either in or out of the circuit. Displays results on oscilloscope. Est. cost: $12. R-F transistor tester checks the upper frequency limit of bipolar transistor. Simple circuit will check programmable unijunction transistors. Simple test circuit to determine the beta of NPN transistors. Build the transistor identometer. Identifies leads on unknown transistors, indicates PNP or NPN polarity, and shows up bad devices. Circuit for a tester to determine the polarities and junction conditions of unmarked transistors. Build a low-cost transistor tester. It tests small-signal, high-power, or phototransistors, SCR's, FET's and conventional diodes. Build an in-circuit transistor tester. Est. cost: $10. Simple circuit is used to separate npn from pnp transistors. Simple checker circuit identifies a transistor as NPN or PNP. Audible transistor checker circuit determines between PNP or NPN and good/bad status. Transistor tester circuit provides an indication of transistor current gain. Transistor tester circuit gives a visual indication as to the fitness of the unit under test and identifies the type (PNP or NPN). Transistor checker. A 0-1 volt DC voltmeter circuit is used to measure transistor-junction or bias voltages. Circuit for testing JFET's (junction field-effect transistors). Circuit for (1) matching diode pairs and (2) matching transistor pairs is used in conjunction with a DVM. Precision current source is used to test LED's, laser diodes, Zener diodes, and bipolar transistors. Component tester circuit checks diodes, bipolar transistors, and SCR's, and tests for continuity. Junk box checker for transistors in T092 packages. Component checker circuit works by lighting corresponding LEDs. Works on both PNP and NPN transistors. Semiconductor tester. Build this curve-tracer adapter for an oscilloscope that allows you to measure both the static and dynamic characteristics of semiconductor transistors under simulated operating conditions. Simple checker for semiconductors. Detects opens and shorts in diodes and transistors, determines PNP and NPN polarity, tests for leakage and checks the triggering of SCR's. Transistor tester exposes bad transistors and tells the characteristics. Can use a built-in or auxiliary DC milliameter. How to test transistors in your TV and other electronic equipment. Requires a basic knowledge of transistor theory and some simple test equipment. Tip: How to test a transistor with an ohmmeter. Transistor checker will check all junction transistors. Lights tell whether or not transistor is okay. Battery powered. How to troubleshoot amplifiers made in Japan which use transistors, but do not have voltage information printed on the schematics. Includes a chart for determining voltage drop across the emitter resistor. How to locate leaky transistors in TV circuits. Testing bipolar transistors. Selecting a suitable replacement for an unknown transistor in a TV receiver. Testing semiconductors. Part 1. Learn the importance of diode and bipolar-transistor parameters, and how to test them. Testing semiconductors. Part 2. Field effect transistors (unipolar transistor). Testing semiconductors. Part 5. A discussion of a transistor's AC parameters. Photoelectric transistor checker never needs batteries and eliminates expensive power supply components. Est. cost: $7. Dual-trace transistor characteristic curve tracer allows you to simultaneously view (on an oscilloscope) two characteristics of a transistor being checked. Either pnp or npn transistors can be checked. Transistor tester locates shorts, leaky or open transistors, tells if it's a PNP or NPN and gives the beta reading. | |||||||||
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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