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Detailed entries for one subject from the INDEX TO HOW TO DO IT INFORMATION.
Click on a see also (sa) or tracing (xx) to view detailed entries about a related subject.
The entries are in alphabetical order by magazine name and then in chronological sequence.
To obtain a copy of any magazine article contact your local public library or the publisher.


Transformerless balanced output circuit takes the place of the usual output transformer used to balance and float the output of a single-ended circuit.
AUDIO AMATEUR 4/1975 [Mar 1976] (v.6#4) pg. 36

Pulse modulated amplifiers. Part 1. Updating pulse modulation. The theory.
AUDIO AMATEUR 1/1987 [Jan 1987] (v.18#1) pg. 6

Pulse modulated amplifiers. Part 2. Developing high quality pulse width modulation. A step-by-step guide for implementation using breadboards.
AUDIO AMATEUR 2/1987 [Mar 1987] (v.18#2) pg. 18

BASIC computer program will calculate component values for the quiescent DC bias of a triode tube amplifier.
AUDIO AMATEUR 3/1988 [Aug 1988] (v.19#3) pg. 46

Mathematical calculations used to refute the popular idea that the common-mode gain of a differential amplifier is proportional to the ratio of the load resistor to the tail resistor.
AUDIO ELECTRONICS 3/2000 [May 2000] (v.31#3) pg. 49
Added Info AUDIO ELECTRONICS 4/2000 [Jul 2000] (v.31#4) pg. 47

R.F. power transistors and amplifiers. Part 1.
CQ. THE RADIO AMATEUR'S JOURNAL Mar 1979 (v.35#3) pg. 32

Listen to the electrical signals generated by your heart and muscles with this amplifier which will provide a gain of about 300,000.
CQ. THE RADIO AMATEUR'S JOURNAL Mar 1979 (v.35#3) pg. 106

R.F. power transistors and amplifiers. Part 2. Test setup for servicing power transistors and RF amplifiers.
CQ. THE RADIO AMATEUR'S JOURNAL Apr 1979 (v.35#4) pg. 56

R.F. power transistors and amplifiers. Part 3. Conclusion discusses radiation and the effects on the human body.
CQ. THE RADIO AMATEUR'S JOURNAL May 1979 (v.35#5) pg. 23

The Pi-network. An explanation of everything you ever wanted to know about the pi-network.
CQ. THE RADIO AMATEUR'S JOURNAL Jul 1980 (v.36#7) pg. 40

A simple solution to high-frequency amplifier circuits utilize the MAR-series of integrated devices.
CQ. THE RADIO AMATEUR'S JOURNAL Jan 1993 (v.49#1) pg. 118

Solid-state RF amplifiers for beginners.
CQ. THE RADIO AMATEUR'S JOURNAL Oct 1993 (v.49#10) pg. 62

Some remedies for unstable solid-state RF amplifiers.
CQ. THE RADIO AMATEUR'S JOURNAL May 1994 (v.50#5) pg. 95

Solid-state RF power amplifiers. Some design tips. Looks at (1) single, parallel, or push-pull transistors, (2) amplifier gain and device choice, (3) instability, (4) proper matching, etc. Includes a schematic diagram of a practical 5 watt class-C amplifier for 7 MHz.
CQ. THE RADIO AMATEUR'S JOURNAL Dec 1995 (v.51#12) pg. 74

Multi-purpose broadband amplifier used to boost the low-power output from a crystal oscillator, VFO, or signal generator. Will produce up to 1 watt of output power from 1 MHz to 50 MHz.
CQ. THE RADIO AMATEUR'S JOURNAL Apr 1997 (v.53#4) pg. 66

A catalog of practical circuits. Part 2. (1) IC audio amplifiers for operating a speaker. (2) Small-signal RF amplifiers suitable for use in receivers and transmitters and as preamplifiers.
CQ. THE RADIO AMATEUR'S JOURNAL Dec 1997 (v.53#12) pg. 52

Screen overcurrent protection. Considerations in designing a power amplifier (which uses tetrodes or pentodes) to prevent damage to expensive vacuum tubes.
DX MAGAZINE Jan 1992 (v.4#1) pg. 12

Common collector amplifiers. Learn about common-collector bipolar junction transistor (BJT) amplifiers.
ELECTRONICS NOW Oct 1993 (v.64#10) pg. 57

Transistor cookbook. Learn about common-emitter and common-base bipolar transistor amplifiers.
ELECTRONICS NOW Nov 1993 (v.64#11) pg. 68

Potpourri of circuits utilizing bipolar junction transistors. Circuits to amplify signals, filter high and low frequencies, generate white noise, flash lamps, etc.
ELECTRONICS NOW May 1994 (v.65#5) pg. 63

Differential amplifiers, one of the most significant analog circuits of all time. A brief introduction to their operation and applications.
ELECTRONICS NOW Mar 1996 (v.67#3) pg. 49

Common-sense design of transistor amplifier. Using Ohms Law to calculate the necessary circuit components for a complete transistorized amplifier.
ELECTRONICS WORLD Jun 1967 (v.77#6) pg. 48

Utility amplifier delivers from 150 milliwatts to 1 watt depending on power supply (3-, 6-, or 12-volts). Uses an integrated circuit. High input impedance is 55,000 ohms and low input impedance is 1,000 ohms. Est. cost: $15.
ELEMENTARY ELECTRONICS Nov-Dec 1969 (v.9#2) pg. 63

How to design an additional simple transistor amplifier stage for existing equipment.
ELEMENTARY ELECTRONICS Sep-Oct 1973 (v.13#5) pg. 35

A discussion of the very simple and straightforward methods that can be used to predict the gain and DC operating conditions of an amplifier.
ELEMENTARY ELECTRONICS May-Jun 1974 (v.14#3) pg. 47

Bandpass amplifier turns the output from a high quality microphone into the "telephone voice" effect. Uses the type 741 op-amp.
ELEMENTARY ELECTRONICS May-Jun 1975 (v.15#3) pg. 84

Circuit for an equalized tape head preamplifier uses the type 741 opamp. Bargain priced tape decks can be made operational with these electronics.
ELEMENTARY ELECTRONICS May-Jun 1975 (v.15#3) pg. 84

Analyzing the Hedge voltage amplifier. Using PSpice for nonlinear modeling.
GLASS AUDIO 6/1999 (v.11#6) pg. 30
Added Info GLASS AUDIO 4/2000 (v.12#4) pg. 59

Audio booster amp. 20-dB booster is battery powered. Use it to provide extra power to microphone circuit, add an extra microphone input to an amplifier, convert a utility amplifier into an audio-signal tracer, etc.
HANDS-ON ELECTRONICS Summer 1984 (v.2#1) pg. 74

Electronic fundamentals. Amplifiers.
HANDS-ON ELECTRONICS May 1987 (v.4#5) pg. 83

The new MMIC (monolithic microwave integrated circuits) wideband amplifiers. Includes a circuit for a working MMIC amplifier you can build from parts.
HANDS-ON ELECTRONICS May 1987 (v.4#5) pg. 88

Electro-mechanical circuit can amplify or oscillate without the aid of vacuum tube or solid-state device. Circuit for a two-stage amplifier also shown.
HANDS-ON ELECTRONICS May 1987 (v.4#5) pg. 92

A simple two-stage amplifier circuit is built from telephone mike, telephone earpiece and a small speaker.
HANDS-ON ELECTRONICS May 1987 (v.4#5) pg. 92

Electronic fundamentals. Amplification stages in amplifier design. Looks at both cascaded staging and bridging.
HANDS-ON ELECTRONICS Jun 1987 (v.4#6) pg. 77

1-MHz to 2-GHz amplifier provides up to 40 dB of gain. Tiny 9-volt powered device uses miniature 50-ohm cascadable monolithic ICs, surface mounting of components, and microwave strip-line layout of components. Est. cost: $20.
MODERN ELECTRONICS [2] Sep 1988 (v.5#9) pg. 32

Using DC voltmeters in troubleshooting direct-coupled differential and high-gain Darlington amplifier circuits.
MODERN ELECTRONICS [2] Feb 1990 (v.7#2) pg. 16

Q-multiplier circuit amplifier.
POPULAR ELECTRONICS [1] Jan 1964 (v.20#1) pg. 77

Class C power amplifier using one transistor.
POPULAR ELECTRONICS [1] Apr 1964 (v.20#4) pg. 70

Transistor amplifier circuit exhibits 20 dB gain and AGC range of about 40 dB.
POPULAR ELECTRONICS [1] Feb 1965 (v.22#2) pg. 76

Basic line-operated solid state amplifier circuit delivering up to one watt.
POPULAR ELECTRONICS [1] Nov 1965 (v.23#5) pg. 117

Manufacturer's circuit. A unity voltage gain impedance-matching amplifier with an effective input impedance of approximately 1,250 megohms and output of 600 ohms.
POPULAR ELECTRONICS [1] Jul 1966 (v.25#1) pg. 82

Circuit for a moderate-to-high gain common-base one transistor amplifier.
POPULAR ELECTRONICS [1] Sep 1966 (v.25#3) pg. 77

Circuit for a typical transformerless IF amplifier strip employing frequency-selective electromechanical filters.
POPULAR ELECTRONICS [1] Sep 1966 (v.25#3) pg. 77

Six circuits using linear integrated circuits including circuits for (1) remote control amplififer, (2) wide-band amplifier and limiter, (3) A 1-watt audio amplifier, (4) a subminiature audio amplifier, (5) a half-watt audio amplifier, and (6) bifet amplifier.
POPULAR ELECTRONICS [1] Dec 1967 (v.27#6) pg. 49

Circuit which will amplify signals up to 200 MHz. May be used in amplifiers or harmonic mixers.
POPULAR ELECTRONICS [1] Sep 1968 (v.29#3) pg. 87

Designing simple solid-state amplifier circuits for the experimenter.
POPULAR ELECTRONICS [1] Sep 1972 (v.2#3) pg. 66

Typical applications of the new CDA (current differencing amplifier). Use this IC in linear or digital circuits. Use with a single 4- to 36-volt power supply.
POPULAR ELECTRONICS [1] Jun 1973 (v.3#6) pg. 61

Nine uses for the 703 monolithic amplifier.
POPULAR ELECTRONICS [1] Jun 1974 (v.5#6) pg. 67

A guide to the use of CMOS inverting stage (amplifier) in linear applications.
POPULAR ELECTRONICS [1] Aug 1974 (v.6#2) pg. 61

A simple method for biasing transistors used in a bipolar transistor amplifier.
POPULAR ELECTRONICS [1] Jun 1975 (v.7#6) pg. 42

General-purpose utility amplifier. Uses include signal tracing, sound detection, induction receiver, etc.
POPULAR ELECTRONICS [1] Aug 1980 (v.18#2) pg. 104

Dual chopper amplifier circuit is used to amplify a minute DC signal so that it can be read out on any digital voltmeter. The circuit works by converting the input into an AC signal, amplifying the AC, and then rectifying back to DC.
POPULAR ELECTRONICS [2] Feb 1989 (v.6#2) pg. 84

Using wideband amplifiers. Learn about amplifiers capable of handling almost any signal.
POPULAR ELECTRONICS [2] Jan 1990 (v.7#1) pg. 73

Broadband RF amplifier circuit has a usable gain of up to 100.
POPULAR ELECTRONICS [2] Apr 1990 (v.7#4) pg. 28

General-purpose amplifier is a simple circuit than can be placed in a signal path to provide any necessary signal boost.
POPULAR ELECTRONICS [2] Jun 1990 (v.7#6) pg. 27

Remote gain-controller circuit uses switches to produce a stepped, variable-gain range of from 1 to 100.
POPULAR ELECTRONICS [2] Nov 1990 (v.7#11) pg. 75

Useful RF (radio frequency) circuits. (1) RF-Sniffer can be used to hunt for RF-noise or indicate that a transmitter is operating. (2) RF-detector probe allows a DC voltmeter to indicate the presence of powerful radio waves. (3) Sensitive RF-detector probe allows a meter to detect small RF signals. (4) Wideband RF instrument amplifier. (5) Tuned or untuned RF wavemeter will provide an indication of the output level of a transmitter signal as radiated from an antenna or dummy load. (6) 100 kHz crystal calibrator RF source to calibrate receivers, sweep generators, signal generators, or other RF sources.
POPULAR ELECTRONICS [2] Jul 1991 (v.8#7) pg. 55

Build a test bench amplifier to boost low-level signals enough to drive a speaker. Can also be used as a high-frequency RF-signal tracer.
POPULAR ELECTRONICS [2] Sep 1993 (v.10#9) pg. 47

Build the "galviamp" (a galvanometer and a variable-gain amplifier) in one compact case.
POPULAR ELECTRONICS [2] Jul 1995 (v.12#7) pg. 63

All about monolithic microwave integrated circuit (MMIC) amplifiers, special devices which provide decent gain from near-DC to the microwave region.
POPULAR ELECTRONICS [2] Dec 1995 (v.12#12) pg. 41

Using the current-difference linear IC amplifier (Norton amplifier) which performs similarly to the op-amp, but is better suited for certain applications.
POPULAR ELECTRONICS [2] Jul 1996 (v.13#7) pg. 49

Electronic voice substitute. Amplify a weak voice or whisper up to 1000 times. Use for fun or as a genuine aid for someone unable to talk at normal volume.
RADIO-ELECTRONICS May 1981 (v.52#5) pg. 84

How to design analog circuits. Part 6. Amplifying AC signals.
RADIO-ELECTRONICS Nov 1982 (v.53#11) pg. 67

How to design analog circuits. Part 7. Multi-stage amplifiers.
RADIO-ELECTRONICS Dec 1982 (v.53#12) pg. 75

How to design analog circuits. The various types of power amplifiers and some important factors to consider when designing these circuits.
RADIO-ELECTRONICS Feb 1983 (v.54#2) pg. 67

How to design analog circuits. How to use feedback.
RADIO-ELECTRONICS Jul 1983 (v.54#7) pg. 68

Designing with linear IC's. Part 4. Differential and instrumentation amplifiers and how to use them.
RADIO-ELECTRONICS Aug 1984 (v.55#8) pg. 66

Designing with linear IC's. Part 5. Current-difference amplifiers (CDA's) and operational transconductance amplifiers (OTA's).
RADIO-ELECTRONICS Sep 1984 (v.55#9) pg. 77

Designing with linear IC's. Part 6. The logarithmic and isolation amplifiers.
RADIO-ELECTRONICS Nov 1984 (v.55#11) pg. 73

Designing with linear IC's. Part 7. Voltage-controlled amplifiers, integrators, and differentiators.
RADIO-ELECTRONICS Dec 1984 (v.55#12) pg. 73

Broadband amplifier circuits like those found in modern transistorized shortwave receivers are explained.
RADIO-ELECTRONICS Apr 1986 (v.57#4) pg. 105

Broadcast-band RF amplifier circuit can be added to a low- to mid-priced receiver or car radio to improve AM reception.
RADIO-ELECTRONICS Mar 1987 (v.58#3) pg. 42

Build this miniature wideband amplifier. Gives a 20-dB gain for TV signals and other signals from DC to 450 MHz. Est. cost: $12.
RADIO-ELECTRONICS May 1987 (v.58#5) pg. 45

Synchronous demodulators, an electronic multiplier that extracts the sum and the difference between your input-frequency signal and your reference switching frequency. An introduction to their operation and application. Also called autocorrellator, lock-in-amplifier, doubly balanced modulator, phase-sensitive detector, I-Q demodulator, synchronous rectifier, phase-locker, or homodyne detector.
RADIO-ELECTRONICS Mar 1990 (v.61#3) pg. 58