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ELECTRIC POWER SUPPLY entries in Index to How To Do It Information
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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.

ELECTRIC POWER SUPPLY
sa   AUDIO AMPLIFIER POWER SUPPLY
sa   AUDIO PREAMPLIFIER POWER SUPPLY
sa   BATTERY
sa   BATTERY ELIMINATOR
sa   COMPUTER POWER SUPPLY
sa   CURRENT REGULATOR
sa   PHOTOVOLTAIC DEVICE
sa   RECTIFIER
sa   TRANSFORMER (ELECTRIC)
sa   UNINTERRUPTABLE POWER SUPPLY
sa   VACUUM TUBE POWER SUPPLY
sa   VOLTAGE & CURRENT CALIBRATION
sa   VOLTAGE CONVERTER
sa   VOLTAGE DIVIDER
sa   VOLTAGE MONITOR
sa   VOLTAGE MULTIPLIER
sa   VOLTAGE REGULATOR
x   POWER SUPPLY (ELECTRIC)
xx   ELECTRIC

A family of regulated and current-limiting power supplies.
AUDIO AMATEUR 2/1974 [Dec 1974] (v.5#2) pg. 13

Crowbar protection for power supplies.
AUDIO AMATEUR 2/1987 [Mar 1987] (v.18#2) pg. 23

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.
AUDIO AMATEUR 1/1995 [Jan 1995] (v.26#1) pg. 26
Correction AUDIO AMATEUR 3/1995 [Aug 1995] (v.26#3) pg. 46

Try synchronous rectification. A technique that replaces diodes with power MOSFETs in low-voltage, high-current power supplies.
AUDIO ELECTRONICS 5/2000 [Sep 2000] (v.31#5) pg. 26
Added Info AUDIOXPRESS Feb 2001 (v.32#2) pg. 78

Solid-state power supply uses no transformer and can deliver up to (+/-) 15 volts when powered by a 5-volt supply or battery.
COMPUTERCRAFT May 1991 (v.1#2) pg. 67

Cyber Supply. Get precise volts from bench power supplies. Interface lets you digitally control a linear bench-type DC power supply to produce precise voltages in 100- or 50-millivolt increments (up to 2 amperes current). Est. cost: $70.
COMPUTERCRAFT Sep 1991 (v.1#6) pg. 36
Correction COMPUTERCRAFT Oct 1991 (v.1#7) pg. 6

A tiny switching power supply is designed to output +12 and -5 volts from a single 5-volt DC source. Ideal for use with many analog ICs.
COMPUTERCRAFT Mar 1992 (v.2#3) pg. 66

An adjustable, regulated, high-current DC power supply uses the LM317 and LM350 IC chips. The unit delivers 1.2-15 v.d.c. at up to 3 amps.
CQ. THE RADIO AMATEUR'S JOURNAL Apr 1980 (v.36#4) pg. 30

A voltage-regulated, high-current 13.8 volt power supply that allows a 12-volt d.c. 2-meter amateur radio to be operated from 110-volt a.c.
CQ. THE RADIO AMATEUR'S JOURNAL Feb 1981 (v.37#2) pg. 11

The Blockbuster. A simple variable lab power supply. Delivers 0-10 v.d.c. at 3 amps.
CQ. THE RADIO AMATEUR'S JOURNAL Sep 1981 (v.37#9) pg. 10

Lab quality power supply features preset and variable output. Use it to power or charge Handi-Talkies or as a well filtered d.c. power supply.
CQ. THE RADIO AMATEUR'S JOURNAL Nov 1981 (v.37#11) pg. 53

Bargain priced transceiver power supply will run a 200 watt PEP h.f. transceiver drawing a continuous 15-20 amperes. Est. cost: $23.
CQ. THE RADIO AMATEUR'S JOURNAL Dec 1981 (v.37#12) pg. 90

A heavy-duty bench power supply delivers 13.8 volts at 5 amperes continuously (10 amps intermittent). Doubles as a transceiver power supply.
CQ. THE RADIO AMATEUR'S JOURNAL Jan 1983 (v.39#1) pg. 36

A low-voltage breadboard power supply. Features an adjustable positive voltage, adjustable negative voltage, and 12 v. fixed voltage. Works in the range 0-15 volts at 0.5 amps.
CQ. THE RADIO AMATEUR'S JOURNAL Mar 1983 (v.39#3) pg. 40

Regulated power supply uses the LM317 and UA7912 regulators. Provides 0 to +20 VDC and a fixed 12 volts negative.
CQ. THE RADIO AMATEUR'S JOURNAL Feb 1987 (v.43#2) pg. 36

Flea market special. A bare bones 0- to 15-Vdc regulated power supply you can build from readily available surplus parts that will deliver up to 20-amperes.
CQ. THE RADIO AMATEUR'S JOURNAL Nov 1987 (v.43#11) pg. 74
Correction CQ. THE RADIO AMATEUR'S JOURNAL Feb 1988 (v.44#2) pg. 6

Unique power-supply chip from AT&T produces a regulated output of 5 to 24 volts DC from almost any 15-to-275 volt AC input. Tips on its use.
CQ. THE RADIO AMATEUR'S JOURNAL May 1994 (v.50#5) pg. 90

The new 3.3 volt power supply standard for portable, battery-powered PCs and wireless equipment.
CQ. THE RADIO AMATEUR'S JOURNAL Sep 1995 (v.51#9) pg. 82

DC power supply filtering schemes to eliminate AC ripple from the DC output. Three approaches illustrated.
CQ. THE RADIO AMATEUR'S JOURNAL Oct 1996 (v.52#10) pg. 74

Well-regulated, modular, laboratory-grade power supply with dual DC supplies (0-50 volts, 0-5 amperes) and a single 5-volt, 3-amp DC supply.
ELECTRONICS EXPERIMENTERS HANDBOOK 1992 pg. 60, 17

5-volt power supply will provide voltage-regulated power for digital ICs needing up to 500 mA.
ELECTRONICS EXPERIMENTERS HANDBOOK 1996 pg. 52

Variable power supply circuit (0-12 volts DC, 1 ampere filtered output). Est. cost: $19 (kit).
ELECTRONICS HOBBYISTS HANDBOOK 1991 pg. 28

Regulated power supply (13.8-volts DC, 2 amperes) operates from 120-volts AC. Est. cost: $25 (kit).
ELECTRONICS HOBBYISTS HANDBOOK 1991 pg. 83

Configurable power supply will suit any device in need of 1.2- to 33-volts DC at up to 1.5 amps.
ELECTRONICS HOBBYISTS HANDBOOK Spring 1994 pg. 32

Triple voltage power supply costs $10.
ELECTRONICS ILLUSTRATED Jul 1964 (v.7#4) pg. 82

Variable DC supply gives up to 30 volts at 500 ma.
ELECTRONICS ILLUSTRATED Nov 1964 (v.7#6) pg. 77

Multi-purpose bench power supply uses an IC regulator. Build either a 17-volt or 38-volt version, delivering up to 200 ma.
ELECTRONICS ILLUSTRATED Jan 1972 (v.15#1) pg. 68

A programmable laboratory-grade power supply for use with integrated circuits limits current and voltage supplied to the test circuit. Output from zero to 60 VDC within 0.001 v of the desired value. Est. cost: $60.
ELECTRONICS ILLUSTRATED Mar 1972 (v.15#2) pg. 23

Variable, high-voltage, bench top DC power supply. Build a 0-250 volt, 100-milliamp regulated power supply with short-circuit protection and output impedance of 15 ohms.
ELECTRONICS NOW Feb 1993 (v.64#2) pg. 45

Triple-output DC power supply. Adjustable (+/-)1.3-volt to (+/-)20-volt supplies (complete with meter and vernier controls) and a fixed 5-volt logic supply. Variable output up to 200 milliamps and fixed output to 300 milliamps.
ELECTRONICS NOW Oct 1993 (v.64#10) pg. 48
Correction ELECTRONICS NOW Jan 1994 (v.65#1) pg. 16

Constant DC voltage supply circuit can provide more than 5 amperes at two switchable current limits.
ELECTRONICS NOW Dec 1993 (v.64#12) pg. 14

Power supply regulation. Learn the strengths and weaknesses of the two principal off-line power supplies (linear-regulated and switching-regulated).
ELECTRONICS NOW Dec 1994 (v.65#12) pg. 69

Simple circuits for negative and positive 5-volt regulators and a bipolar power supply.
ELECTRONICS NOW Apr 1995 (v.66#4) pg. 8

Off-line linear voltage regulators. Includes instructions for building two miniature power supplies: (1) Adjustable DC output of 8 to 12 volts up to 100 milliamperes. (2) Precision 5-volt DC output.
ELECTRONICS NOW Apr 1995 (v.66#4) pg. 71
Added Info ELECTRONICS NOW Aug 1995 (v.66#8) pg. 12

Handy hobby power supply provides both fixed (+5-volt) and variable DC outputs. Input can be either 7- to 20-volts AC or 7- to 30-volts DC. Est.cost: $19 (kit).
ELECTRONICS NOW Jun 1995 (v.66#6) pg. 43

Versatile bench power supply offers five different output voltages (+5, -5, +12, and positive and negative variable sources between 1.2 and 28 volts).
ELECTRONICS NOW Dec 1995 (v.66#12) pg. 31
Correction ELECTRONICS NOW Aug 1996 (v.67#8) pg. 10

Circuit for a positive/negative 12-volt regulated power supply which uses 7812 and 7912 regulators.
ELECTRONICS NOW Jan 1996 (v.67#1) pg. 8

Switching-mode power supplies. A closer look at the fundamentals of design and operation.
ELECTRONICS NOW May 1996 (v.67#5) pg. 43

Four essential test instruments. DC power supplies, function generators, bench digital multimeters, and frequency counters. An examination of their applications and key features.
ELECTRONICS NOW Aug 1996 (v.67#8) pg. 69

Tip on using old PC power supplies to power experimental digital circuits.
ELECTRONICS NOW Mar 1997 (v.68#3) pg. 11

All about switching power supplies.
ELECTRONICS NOW Aug 1997 (v.68#8) pg. 40

Two charts and a table simplifying design of transformerless DC power supply useful in many low current applications.
ELECTRONICS WORLD Apr 1966 (v.75#4) pg. 86

A continuously variable low-voltage power supply. Delivers up to 20 volts with no load and up to 12 volts with a 500-milliampere load.
ELECTRONICS WORLD Oct 1967 (v.78#4) pg. 79

Special section on power supplies.
ELECTRONICS WORLD Apr 1968 (v.79#4) pg. 37

Design of an 11- to 32-volt, 700 mA power supply which has good regulation and built-in overcurrent protection.
ELECTRONICS WORLD Mar 1969 (v.81#3) pg. 48

Design and construction of regulated supplies. Uses inexpensive non-critical parts.
ELECTRONICS WORLD Feb 1970 (v.83#2) pg. 30
Correction ELECTRONICS WORLD May 1970 (v.83#5) pg. 23

Universal regulated power supply. Most components are from a discarded TV chassis.
ELECTRONICS WORLD Aug 1970 (v.84#2) pg. 60

Improvement to a typical solid-state regulated power supply circuit.
ELECTRONICS WORLD Sep 1971 (v.86#3) pg. 73

Simple +9-volt power supply circuit for transistorized circuits.
ELECTRONICS WORLD Sep 1971 (v.86#3) pg. 80

Special issues on commercial power supplies and design considerations.
ELECTRONICS WORLD Oct 1971 (v.86#4) pg. 28

Circuit for a preamplifier power supply requiring 125-135 volts DC at 7 mA and 6.3 volts AC for the filament of a 6CB6 tube.
ELEMENTARY ELECTRONICS Mar-Apr 1966 (v.2#1) pg. 20

Regulated DC supply from 150 to 400 volts with 1% or better regulation. Maximum current is 120 mA. Est. cost: $32.
ELEMENTARY ELECTRONICS May-Jun 1966 (v.2#2) pg. 91

A basic primer on power supplies.
ELEMENTARY ELECTRONICS Jan-Feb 1967 (v.3#3) pg. 67

Duo-Reg, a bipolar, adjustable, regulated power supply to power your IC and other solid-state circuits. Can be made capable of producing up to 600 mA output at (+ or -) 20 volts or (+ or -) 40 volts.
ELEMENTARY ELECTRONICS Sep-Oct 1970 (v.10#4) pg. 27

Let's look at power supplies. How they work.
ELEMENTARY ELECTRONICS Sep-Oct 1970 (v.10#4) pg. 58

A 9-volt regulated power supply at 250 mA.
ELEMENTARY ELECTRONICS Nov-Dec 1970 (v.10#5) pg. 52

A designer's bipolar power supply uses IC technology to deliver 15 volts DC (+ or -). Output will not vary more than 0.004 volts if input is anywhere between 100 and 135 volts. Est. cost: $20.
ELEMENTARY ELECTRONICS May-Jun 1973 (v.13#3) pg. 51

Professional power supply for hobbyists has the following features: 20-watts of output power, adjustable current limiting (0.1 amp to 1.0 amp), 0.5% regulation, adjustable output voltage of 0.6 to 30 volts, and short circuit protection. Est. cost: $35.
ELEMENTARY ELECTRONICS Jul-Aug 1975 (v.15#4) pg. 41

Hobbyist power supply for TTL. A steady five volts is provided by this ultra-simple, high performance regulator. Output current is automatically limited to 1 ampere. Built-in short circuit protection turns off supply.
ELEMENTARY ELECTRONICS Sep-Oct 1975 (v.15#5) pg. 77

A power supply offering +5, -15, and +15 volts is housed in a metal cabinet. With QT (quick test) sockets mounted on top of the cabinet, the unit becomes a flexible "breadboard" system. Has built-in fuse protection. Est. cost: $50.
ELEMENTARY ELECTRONICS Mar-Apr 1976 (v.16#2) pg. 41

Antique radio power supply is suitable for operating the filaments of antique vacuum tubes. This unit can supply from zero to 13 volts DC, at currents up to 1.5 amperes. Also suitable as a general bench supply for transistorized car radios and can be used as a battery charger.
ELEMENTARY ELECTRONICS Jan-Feb 1977 (v.17#1) pg. 47

Mini-Reg, the regulated IC power supply. Continuously adjustable from 3.4 to 15-volts DC and delivers up to 500 miliamperes. It is short-circuit proofed and features adjustable current limiting.
ELEMENTARY ELECTRONICS Jan-Feb 1979 (v.19#1) pg. 43

The smart power supply delivers a regulated 5 and 8-volt output at up to 1-amp. LEDs show you how much current is currently being drawn (.25, .50, .75, or 1.0 amps). Est. cost: $20.
ELEMENTARY ELECTRONICS Jul-Aug 1979 (v.19#4) pg. 75

Designing regulated power supplies. Includes basic design schematics along with charts of fuse sizes and commonly used transformer and regulator combinations for both positive and negative supplies.
ELEMENTARY ELECTRONICS Sep-Oct 1979 (v.19#5) pg. 44

Restoring power supplies on vintage (antique) radios.
ELEMENTARY ELECTRONICS Jul-Aug 1980 (v.20#4) pg. 71

Test bench power supply for vacuum tubes. This high-quality, adjustable supply can output voltages of more than 500V DC, but incorporates many safety features and is short-circuit proof.
GLASS AUDIO 2/1990 (v.2#2) pg. 17
Correction GLASS AUDIO 1/1991 (v.3#1) pg. 48

A high quality vacuum tube voltage regulator. Build a prototype power supply that features a 250V feedback-type regulator.
GLASS AUDIO 2/1992 (v.4#2) pg. 24

Vacuum-tube regulator design. Circuits for regulators with 250-600V outputs which are varied over only a small range. The amount of current supplied can be any reasonable amount. Advice on choosing voltages and tubes.
GLASS AUDIO 3/1993 (v.5#3) pg. 16
Added Info GLASS AUDIO 2/1994 (v.6#2) pg. 44

Electrolytic capacitor reforming unit which can also be used as a current-limited high-voltage DC power supply.
GLASS AUDIO 6/1997 (v.9#6) pg. 22

The power line interface. This article takes you through the AC line interface of a typical piece of audio equipment. Provides practical suggestions to achieve optimum performance and safety in anything you build that plugs into the wall.
GLASS AUDIO 6/2000 (v.12#6) pg. 26

Dual power supply. Construct a bench-top supply which is adjustable down to zero volts without loss of regulation and has a snap-action, current-overload protection circuit. Delivers 0- to 20-volts at 400-mA maximum.
HANDS-ON ELECTRONICS Summer 1984 (v.2#1) pg. 21

Designing practical DC power supplies. Engineering concepts and theory related to rectifiers, filters and regulators.
HANDS-ON ELECTRONICS Summer 1984 (v.2#1) pg. 57

Electrical safety tips when designing and building electronics projects that are powered by 117-volt AC line.
HANDS-ON ELECTRONICS Summer 1984 (v.2#1) pg. 91

Low-power polarity inverter circuit utilizes the multi-purpose 555 timer integrated circuit.
HANDS-ON ELECTRONICS Winter 1985 (v.2#3) pg. 92

Power supply balance indicator. Three LED's indicate when the positive and negative levels of a split power supply are within 1% of each other.
HANDS-ON ELECTRONICS Jan-Feb 1986 (v.3#1) pg. 96

Schematic for a power supply to provide both positive 9-volts and negative 9-volts.
HANDS-ON ELECTRONICS Jul-Aug 1986 (v.3#4) pg. 17
Correction HANDS-ON ELECTRONICS Dec 1986 (v.3#7) pg. 4

Dual-polarity power supply circuit. Supplies up to 200-mA of negative voltage from a 5-15 volt supply.
HANDS-ON ELECTRONICS Sep-Oct 1986 (v.3#5) pg. 28

Antique radio. Tracking down that uncontrollable hum. Problems with power supplies and filter capacitors in old radios.
HANDS-ON ELECTRONICS May 1987 (v.4#5) pg. 90

Antique radio. Starting up those old AC sets. Build this variable power-supply "start-up control console". It features an AC-voltmeter, DC ammeter, transformer tap switch, charging rate rheostat, etc.
HANDS-ON ELECTRONICS Aug 1987 (v.4#8) pg. 88

Using op-amps in power-supply circuits. Experimenting with op-amp power-supply circuits promotes a deeper understanding of op-amp applications.
HANDS-ON ELECTRONICS Oct 1987 (v.4#10) pg. 59

Alter the output of your power supply by adding a voltage doubler, voltage inverter, and/or voltage multiplier. Three circuits shown.
HANDS-ON ELECTRONICS Oct 1987 (v.4#10) pg. 92

Universal power supply can be tailored by plugging in the right components. The printed-circuit layout allows either individual diodes or an epoxy-packaged bridge rectifier to be used.
HANDS-ON ELECTRONICS Jan 1988 (v.5#1) pg. 54

Power Play. This universal power supply can output from 0-25 volts and provide up to 1 ampere of current, plus a negative voltage whenever needed. Incorporates a digital display to check voltage and current levels.
HANDS-ON ELECTRONICS Feb 1988 (v.5#2) pg. 35
Correction HANDS-ON ELECTRONICS Aug 1988 (v.5#8) pg. 6

Circuit built around the 7805 5-volt regulator can power low-current (1 amp or less) 5-volt circuits, such as TTL or CMOS based projects.
HANDS-ON ELECTRONICS Mar 1988 (v.5#3) pg. 96

Power supply circuit is capable of converting a positive 12- or 15-volt source to provide a negative 5.2-volt output, while delivering 0-50 mA of current.
HANDS-ON ELECTRONICS Mar 1988 (v.5#3) pg. 100

Design and build your own power supply.
HANDS-ON ELECTRONICS Sep 1988 (v.5#9) pg. 84

RF power cell circuit uses operating power generated by an antenna to power a crystal radio, transistor radio, etc.
HANDS-ON ELECTRONICS Dec 1988 (v.5#12) pg. 82

BASIC computer program for the PET computer will draw (design) the schematic for a power supply from 1.2 volts to 25 volts and load currents up to 5 amperes. The computer (or you) can specify the transformer.
KILOBAUD MICROCOMPUTING #44 Aug 1980 pg. 130

Construct a modular, multi-purpose power supply with fixed 5V and variable +/-22V output at 1.5 amps.
KILOBAUD MICROCOMPUTING #55 Jul 1981 (v.5#7) pg. 61
Correction KILOBAUD MICROCOMPUTING #57 Sep 1981 (v.5#9) pg. 212
Correction KILOBAUD MICROCOMPUTING Feb 1982 (v.6#2) pg. 163

How to use a bulb in the power supply leads to control the amount of current fed to an IC project. By controlling the amount of current fed, you may be able to prevent damage to ICs which are wired up incorrectly.
MODERN ELECTRONICS [1] May 1978 (v.1#3) pg. 6

Universal power supply for solid-state electronics. Provides 5-volts or 12-volts at up to 1 amp. Other output voltages can be achieved by changing regulators.
MODERN ELECTRONICS [1] May 1978 (v.1#3) pg. 70

Schematic shows how to convert a Radio Shack #22-124 regulated 12-volt supply to a regulated variable supply providing from 1.2 to 12-volts output.
MODERN ELECTRONICS [1] Jun 1978 (v.1#4) pg. 15

How to design and construct power supplies for your electronic projects. Includes schematics and circuit board pattern for a dual polarity, standard power supply which can deliver +/- 5-volts, 8-volts, 12-volts etc. depending upon components selected. Est. cost: $8 (less transformer).
MODERN ELECTRONICS [1] Oct 1978 (v.1#8) pg. 44

Circuit for adding a meter to a power supply to measure the output up to 15-volts.
MODERN ELECTRONICS [1] Dec 1978 (v.1#9) pg. 8

Schematic for a variable power supply which can deliver zero to 120 volts at about 4 mA. Supply is used in connection with a laser diode circuit, and can operate up to the 10 mA load range.
MODERN ELECTRONICS [1] Dec 1978 (v.1#9) pg. 9

Designing DC power supplies. Step-by-step procedure describes how to design the fixed power and adjustable power supplies you need for solid-state applications.
MODERN ELECTRONICS [2] Mar 1985 (v.1#6) pg. 41

An experimenter's multi-voltage power supply. Designed to provide all the voltages required by modern IC circuits. Offers simultaneous outputs at plus and minus 15, 12, and 5 volts.
MODERN ELECTRONICS [2] May 1985 (v.1#8) pg. 43
Correction MODERN ELECTRONICS [2] Sep 1985 (v.2#3) pg. 4

Power supply for an EPROM burner. Circuit for a switching dc-to-dc converter to boost +5-volt input up to +12, +21, or +24 volts. Est. cost: $5.
MODERN ELECTRONICS [2] Jul 1985 (v.2#1) pg. 70

How to design a filter capacitor for a power supply.
MODERN ELECTRONICS [2] Aug 1985 (v.2#2) pg. 72

Designing power supplies with switching regulators. IC switching regulators simplify design, increase efficiency and reduce size.
MODERN ELECTRONICS [2] Sep 1985 (v.2#3) pg. 42

AC-to-DC conversion. How a power supply really works, regulators you can build, and a computer program to aid design.
MODERN ELECTRONICS [2] May 1986 (v.3#5) pg. 30
Correction MODERN ELECTRONICS [2] Sep 1986 (v.3#9) pg. 5
Added Info MODERN ELECTRONICS [2] Apr 1987 (v.4#4) pg. 91

Dual-polarity power supply project is adjustable from 1.2 to 37 volts (+/-) and has a built-in digital-numeric metering system that can be used to monitor output voltage or current.
MODERN ELECTRONICS [2] Mar 1990 (v.7#3) pg. 25
Correction MODERN ELECTRONICS [2] Jun 1990 (v.7#6) pg. 5
Correction MODERN ELECTRONICS [2] Jul 1990 (v.7#7) pg. 5
Correction MODERN ELECTRONICS [2] Dec 1990 (v.7#12) pg. 9

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.
MODERN ELECTRONICS [2] Jun 1990 (v.7#6) pg. 40

A laboratory-grade low-voltage DC power supply offers two output voltage ranges (0-to-150-millivolt and 0 to 9 volts) up to 2 amperes of current, is short-circuit protected and can go all the way down to 0 volt.
MODERN ELECTRONICS [2] Nov 1990 (v.7#11) pg. 32

Power supply for IC experimenting. An AC-operated transformerless DC power source that can be used for powering small, low-power circuits and projects. Delivers approximately 50 milliamperes at 5-volts or 12-volts.
MODERN ELECTRONICS [2] Jan 1991 (v.8#1) pg. 52
Added Info MODERN ELECTRONICS [2] Mar 1991 (v.8#3) pg. 7

Universal power supply outputs from 5- to 15-volts DC at up to one ampere. Adapter cables make it easy to connect the power supply to a variety of devices.
POPTRONIX HOBBYISTS HANDBOOK Winter 1996 pg. 37

Light-controlled power supply goes from 0 to 25 volts. Est. cost: $13.
POPULAR ELECTRONICS [1] Feb 1964 (v.20#2) pg. 53

High wattage reducer.
POPULAR ELECTRONICS [1] Feb 1964 (v.20#2) pg. 57

Low voltage tap on high voltage bench supply powers transistors.
POPULAR ELECTRONICS [1] Apr 1964 (v.20#4) pg. 66

Well-filtered, regulated semiconductor supply for transistorized equipment.
POPULAR ELECTRONICS [1] May 1964 (v.20#5) pg. 53

Electronic power supply regulator.
POPULAR ELECTRONICS [1] May 1964 (v.20#5) pg. 63

Shock-proof your power supply.
POPULAR ELECTRONICS [1] Jun 1964 (v.20#6) pg. 55

Light-controlled power supply featuring either constant current or constant voltage.
POPULAR ELECTRONICS [1] Sep 1964 (v.21#3) pg. 70

Schematic for transformerless transistorized power amplifier.
POPULAR ELECTRONICS [1] Nov 1964 (v.21#5) pg. 87

Compaction regulated power supply (in the 150 to 250 voltage range) uses one tube.
POPULAR ELECTRONICS [1] Feb 1965 (v.22#2) pg. 57

Circuit for extracting 9- to 12-volts from a 6.3-volt transformer to power transistor equipment.
POPULAR ELECTRONICS [1] Jun 1965 (v.22#6) pg. 73

Learning to stack silicon diodes to get all the power supply voltage you need.
POPULAR ELECTRONICS [1] Jul 1965 (v.23#1) pg. 58

Build a fail-safe transistor power supply.
POPULAR ELECTRONICS [1] Oct 1965 (v.23#4) pg. 74

Circuit for low-cost, line-operated, half-wave power supply.
POPULAR ELECTRONICS [1] Nov 1965 (v.23#5) pg. 116

A 15-watt, 50 mc. RF power amplifier circuit driven with 1-watt signal. Uses npn silicon power transistor. Circuit may be modified for other frequencies and power levels.
POPULAR ELECTRONICS [1] Feb 1966 (v.24#2) pg. 80

Multi-purpose Sylvania-designed power supply circuit has a rating of 250 volts, 400 cycles, when used with 25 ma, 20% power factor capacitive load.
POPULAR ELECTRONICS [1] May 1966 (v.24#5) pg. 98

Experimenter's "professional" power supply. Adjustable 0 to 10 volts DC. Adjustable 0 to 500 mA. Short circuit proof. Est. cost: $15 to $30.
POPULAR ELECTRONICS [1] Nov 1967 (v.27#5) pg. 71

Experimenter's short-proof power supply will deliver 0 to 32 volts and 10 mA to 2 amperes, continuously variable. Est. cost: $36.
POPULAR ELECTRONICS [1] Feb 1968 (v.28#2) pg. 53

A 3.6 volt power supply that will deliver up to 1.5 amps. Ideal for use with integrated circuits because it is very stable and will run cool even when operating 24 hours a day. Built-in ammeter.
POPULAR ELECTRONICS [1] Aug 1968 (v.29#2) pg. 27

Circuit for a variable DC power supply will supply to 12 volts at currents up to 300 mA.
POPULAR ELECTRONICS [1] Aug 1968 (v.29#2) pg. 85

Adjustable AC power supply uses an inexpensive Variac.
POPULAR ELECTRONICS [1] Jan 1969 (v.30#1) pg. 77

Description of an integrated circuit that can be connected to the output of an unregulated power supply and make it perform like more expensive lab equipment. Est. cost: $5.
POPULAR ELECTRONICS [1] Jan 1969 (v.30#1) pg. 79

Laboratory integrated circuit power supply delivers 0 to 20 volts at 0 to 2 amperes. Est. cost: $50.
POPULAR ELECTRONICS [1] Jun 1971 (v.34#6) pg. 31

Precision lab power supply delivers up to 30 volts and 1.2 amperes of regulated power. Est. cost: $80.
POPULAR ELECTRONICS [1] Feb 1972 (v.1#2) pg. 32

Simple adapter converts 6-volt lantern battery into RTL 3.6-volt integrated circuit power supply. Est. cost: $5.
POPULAR ELECTRONICS [1] Apr 1972 (v.1#4) pg. 42

Slow turn-on circuit protects power supply.
POPULAR ELECTRONICS [1] Sep 1972 (v.2#3) pg. 73

Build the little giant power supply. One IC makes blow-out-proof selectable voltage supply. Provides 5,6,8,12, or 15 volts DC at currents up to 1 ampere. Est. cost: $17.
POPULAR ELECTRONICS [1] Feb 1973 (v.3#2) pg. 62

High-quality bench power supply has a regulation better than 0.06%. Select voltage of + or - 9, 10, 12, 15, and 20 volts with a current limit of 10 mA or 100 mA. Est. cost: $50.
POPULAR ELECTRONICS [1] Aug 1973 (v.4#2) pg. 33

Insert some resistance onto a solid-state power supply circuit so that it turns on slowly and does not blow the rectifier.
POPULAR ELECTRONICS [1] Nov 1973 (v.4#5) pg. 26

Circuit for a low-cost general purpose bench supply that can deliver between 5 and 16 volts at up to about 2 amperes.
POPULAR ELECTRONICS [1] Nov 1973 (v.4#5) pg. 26

Three-way bench power supply. Two 0-15 volts at 750 mA are completely isolated. A third supply will go to 50 volts at 1 ampere.
POPULAR ELECTRONICS [1] Jan 1974 (v.5#1) pg. 62

Circuits for two supplies. (1) A voltage-regulated DC supply usable from 3 to 25 volts. (2) An adjustable-current DC supply usable as a battery charger or speed control and power source of battery-operated toys.
POPULAR ELECTRONICS [1] Sep 1974 (v.6#3) pg. 81

Experimenters power supply outputs 0- to 30-volts. It has a split output to provide both positive and negative supplies. Voltage regulation is 0.05% in worst-case conditions.
POPULAR ELECTRONICS [1] Feb 1975 (v.7#2) pg. 70

Circuit for a 5-volt power supply for experimenting with TTL's.
POPULAR ELECTRONICS [1] Apr 1975 (v.7#4) pg. 86

How to design your own power supplies. Following a step-by-step procedure, you can build a line-operated, professional power supply to your personal requirements. Building-block approach starts with the power transformer/rectifier/filter system that is basic to all line-operated systems.
POPULAR ELECTRONICS [1] Jun 1975 (v.7#6) pg. 36
Correction POPULAR ELECTRONICS [1] Aug 1975 (v.8#2) pg. 6

Circuit for a regulated output covering 50 to 200 mA with a 50 V input.
POPULAR ELECTRONICS [1] Sep 1975 (v.8#3) pg. 91

Using diodes in power supplies. Design considerations when building power supplies.
POPULAR ELECTRONICS [1] Oct 1975 (v.8#4) pg. 100

Build a preregulated power supply. It uses two inexpensive 723 voltage regulator IC's in a circuit that can deliver 3 to 35 volts dc at load currents up to 3 amperes. There is no need for massive heat sinks or cooling fans.
POPULAR ELECTRONICS [1] Nov 1975 (v.8#5) pg. 58
Correction POPULAR ELECTRONICS [1] Feb 1976 (v.9#2) pg. 7

A "junk-box" 5-volt power supply. Discrete circuit made from spare parts gives IC-regulator performance.
POPULAR ELECTRONICS [1] May 1976 (v.9#5) pg. 66

Protecting your power supply from shorts, overloads, etc. How to control the transformer's primary circuit and the removal of base drive from a transistor in series with a load.
POPULAR ELECTRONICS [1] Nov 1976 (v.10#5) pg. 52

Insert some resistance in series with capacitors (or use the circuit shown) to eliminate power surges when electronic equipment is first turned on.
POPULAR ELECTRONICS [1] Dec 1976 (v.10#6) pg. 28

Full-protection power supply protects both itself and the load against overloads and short circuits. Uses a 723 integrated circuit which can be programmed to automatically drop the output current to a small fraction of maximum under overload or short circuit conditions.
POPULAR ELECTRONICS [1] Feb 1977 (v.11#2) pg. 59

How switching regulators can be used in power supplies to lower heat loss and keep costs down by eliminating the need for cooling fans and/or large heat sinks.
POPULAR ELECTRONICS [1] Apr 1977 (v.11#4) pg. 60

How to design and build power supplies. Part 1. Basics of transformers, rectifiers, filters, voltage regulators and protection circuits.
POPULAR ELECTRONICS [1] Apr 1978 (v.13#4) pg. 41
Correction POPULAR ELECTRONICS [1] Jul 1978 (v.14#1) pg. 6

How to design and build power supplies. Part 2. Some typical circuits including (1) 8-volt, 15-ampere for S-100 computer bus, (2) 5-volt, 4-ampere regulated supply, (3) 12-volt, 1-ampere supply and (4) 5-volt, 10-ampere supply.
POPULAR ELECTRONICS [1] May 1978 (v.13#5) pg. 61

A simple precision power supply for your workbench. Delivers from 1.25 to 33 volts at up to 1.5 amperes with excellent regulation.
POPULAR ELECTRONICS [1] Jun 1979 (v.15#6) pg. 69

Protection circuit senses any sudden increase (or decrease) in power supply output voltage and automatically shuts off power supply to regulator.
POPULAR ELECTRONICS [1] Mar 1980 (v.17#3) pg. 74

Modify an HO power pack to include filtering and a means of varying the output voltage and you will have a simple variable-voltage power supply for electronic experimenting.
POPULAR ELECTRONICS [1] Apr 1980 (v.17#4) pg. 77

Power supplies for operational amplifiers. Seven schematics shown.
POPULAR ELECTRONICS [1] Apr 1981 (v.19#4) pg. 57
Correction POPULAR ELECTRONICS [1] Jun 1981 (v.19#6) pg. 6

Circuit for a dual-polarity five-volt power supply is suitable for TTL, low-power Schottky TTL, op-amps, MOS and CMOS.
POPULAR ELECTRONICS [1] May 1982 (v.20#5) pg. 108

Regulated power-supply circuit provides 6-, 9-, or 12-volts DC. Selection of the appropriate regulator devices (IC's) is discussed.
POPULAR ELECTRONICS [2] Jul 1989 (v.6#7) pg. 86

Variable AC power supply circuit. Optional circuit can be added to provide a variable DC output.
POPULAR ELECTRONICS [2] Nov 1989 (v.6#11) pg. 24

Designing power-supply circuits. Explains the principles of PS operation and construction using practical circuits as examples. Also covers limitations, safety practices, and interesting features.
POPULAR ELECTRONICS [2] Feb 1990 (v.7#2) pg. 35

Transformerless DC power supply uses "scoop" capacitors. Delivers from 3.2 to 43.5 volts DC at currents ranging from 31 to 322 mA.
POPULAR ELECTRONICS [2] Apr 1990 (v.7#4) pg. 45
Added Info POPULAR ELECTRONICS [2] Jun 1990 (v.7#6) pg. 4

Variable 10-amp unregulated AC/DC power supply also serves as a "universal" 1.5 hp AC or DC motor-speed controller.
POPULAR ELECTRONICS [2] May 1990 (v.7#5) pg. 23

Choosing and using three-terminal voltage regulators. How they work, how they are used, and how to select the right one for a project. Includes several power supply circuits.
POPULAR ELECTRONICS [2] May 1990 (v.7#5) pg. 72

Versatile unregulated dual-polarity DC power supply circuit has a potentiometer to vary the output voltage level.
POPULAR ELECTRONICS [2] Jun 1990 (v.7#6) pg. 27

Power-supply circuit uses an LM317 regulator.
POPULAR ELECTRONICS [2] Nov 1990 (v.7#11) pg. 23

Universal three-terminal power supply circuit. Can be configured to provide either positive or negative voltages; full-wave, full-wave bridge, or half-wave rectification; and can be fed from a single-winding, dual-winding, or center-tapped transformer. Fits into a 1"x2" space.
POPULAR ELECTRONICS [2] Nov 1990 (v.7#11) pg. 53

Variable AC power supply circuit for a test bench utilizes a variable transformer.
POPULAR ELECTRONICS [2] May 1991 (v.8#5) pg. 77

Build a 1.25- to 33-volts laboratory power supply with two variable outputs (one positive and one negative). Add precision potentiometers to control output to 1/100 of a volt.
POPULAR ELECTRONICS [2] Oct 1991 (v.8#10) pg. 27

Experimenter's test-bench dual-polarity, multi-voltage power supply delivers 12, 8, and 5 volts, both plus and minus.
POPULAR ELECTRONICS [2] May 1992 (v.9#5) pg. 73

Versatile circuit can be used to test Zener diodes or act as a stand-alone power supply.
POPULAR ELECTRONICS [2] Mar 1993 (v.10#3) pg. 73

Inexpensive, configurable power supply will supply from 1.2 volts to 33 volts at up to 1.5 amps.
POPULAR ELECTRONICS [2] Jun 1993 (v.10#6) pg. 47

Circuit for a simple dual (+/-) 15-volt unregulated power supply.
POPULAR ELECTRONICS [2] Nov 1993 (v.10#11) pg. 71

Short-circuit protector for a regulated-DC power supply.
POPULAR ELECTRONICS [2] Nov 1994 (v.11#11) pg. 31

All about current-crowbar circuits which can shut down a power supply if a preset current value is exceeded. Four circuits shown.
POPULAR ELECTRONICS [2] Apr 1995 (v.12#4) pg. 59
Added Info POPULAR ELECTRONICS [2] Jul 1995 (v.12#7) pg. 4

Regulated power supply circuit is reliable, flexible, cheap and uses spare or recycled transistors.
POPULAR ELECTRONICS [2] May 1995 (v.12#5) pg. 94

Simple, dependable circuit for a 12-volt DC power supply.
POPULAR ELECTRONICS [2] Jun 1995 (v.12#6) pg. 78

The Crusher. Build a variable voltage (1.26 to 30-volt), high-current (5-ampere) power supply that is useful when testing or using ham radio gear.
POPULAR ELECTRONICS [2] Nov 1995 (v.12#11) pg. 84

Dual-polarity low-current 9-volt power supply (for use with op amps, etc.).
POPULAR ELECTRONICS [2] Apr 1996 (v.13#4) pg. 67

Build a versatile bench top power supply. Outputs between 5- and 15-volts DC up to one ampere. Output can be varied linearly or switched to specific levels.
POPULAR ELECTRONICS [2] May 1996 (v.13#5) pg. 57
Correction POPULAR ELECTRONICS [2] Jul 1996 (v.13#7) pg. 6

Using digital panel meters to enhance the look and performance of your next project. Circuits include: (1) AC power supply, (2) DC-to-DC supply, (3) DC ammeter, (4) automobile voltage monitor, (5) digital DC voltmeter, and (6) low-ohms meter.
POPULAR ELECTRONICS [2] Oct 1996 (v.13#10) pg. 39
Correction POPULAR ELECTRONICS [2] Jan 1997 (v.14#1) pg. 6

Op-amp applications. (1) CMOS-interface driver, (2) dual-voltage supply, (3) AC amplifier, (4) adjustable comparator, (5) dual-voltage comparator, (6) four-level voltage detector, and (7) voltage window.
POPULAR ELECTRONICS [2] Oct 1996 (v.13#10) pg. 68

15-volt DC power supply that requires only a 12-volt transformer.
POPULAR ELECTRONICS [2] May 1997 (v.14#5) pg. 62

Circuit for a separate power source (+8 to +20 volts) to isolate one sensitive circuit from interfering with another.
POPULAR ELECTRONICS [2] May 1997 (v.14#5) pg. 62

A simple and efficient overload-protected power supply circuit for DC voltages up to 22 volts.
POPULAR ELECTRONICS [2] Jun 1997 (v.14#6) pg. 69
Correction POPULAR ELECTRONICS [2] Sep 1997 (v.14#9) pg. 6

Circuit generates pulsating DC using four diodes and a plain transformer.
POPULAR ELECTRONICS [2] Sep 1997 (v.14#9) pg. 70

Transformer-less DC power supply is equipped with a bridge rectifier to double the output current and cut the ripple voltage.
POPULAR ELECTRONICS [2] Dec 1997 (v.14#12) pg. 63

Circuit for a 9-volt, dual-polarity unregulated DC power supply with current levels up to 100 mA (1 amp at reduced output voltage).
POPULAR ELECTRONICS [2] Sep 1998 (v.15#9) pg. 57

DC power supply circuit, driven by an automobile battery, can provide regulated voltages from 4.5 to 13 volts with output currents up to 3 amps. Ideal for powering a handheld ham transceiver in your car.
POPULAR ELECTRONICS [2] Jan 1999 (v.16#1) pg. 49

(1) Full-wave dual-polarity power supply circuit. (2) Half-wave dual-polarity power supply circuit.
POPULAR ELECTRONICS [2] Dec 1999 (v.16#12) pg. 81

Build a zener regulated power supply. Features continuously adjustable output, from 0 to 15 volts DC at 1 ampere, electronic filtering and regulation, very low ripple output, and dual meters monitoring voltage and current output.
POPULAR MECHANICS Jan 1967 (v.127#1) pg. 192

Pulse-width modulated DC power supplies for TV's and how to troubleshoot them.
RADIO-ELECTRONICS Aug 1978 (v.49#8) pg. 74

Points to consider if you want to use a power supply voltage different than the one called for in a particular project. Schematics of typical hobby supplies are shown.
RADIO-ELECTRONICS Sep 1978 (v.49#9) pg. 76

Technology today. All about switching power supplies. Part 1.
RADIO-ELECTRONICS Jun 1979 (v.50#6) pg. 64

Technology today. All about switching power supplies. Part 2. Two regulator IC's and practical circuits designed around them.
RADIO-ELECTRONICS Jul 1979 (v.50#7) pg. 61

A switch-mode power supply controller IC (Signetics NE5561). What it does and tips on it's use.
RADIO-ELECTRONICS Feb 1983 (v.54#2) pg. 92

Tips on designing voltage regulators and power supplies.
RADIO-ELECTRONICS May 1983 (v.54#5) pg. 90

Increasing the current-handling capability of regulators found in power supplies.
RADIO-ELECTRONICS Jul 1983 (v.54#7) pg. 78
Added Info RADIO-ELECTRONICS Jan 1984 (v.55#1) pg. 10

More about power supply regulators.
RADIO-ELECTRONICS Aug 1983 (v.54#8) pg. 98

Circuit to generate a negative supply from a two terminal transformer.
RADIO-ELECTRONICS Jan 1984 (v.55#1) pg. 95

Circuits for a variable power supply that can deliver 0 to 18 volts d.c. in two ranges.
RADIO-ELECTRONICS Feb 1984 (v.55#2) pg. 95

How to design power supplies for analog circuits. All about unregulated and regulated power supplies, IC regulators, and overvoltage-protection circuits.
RADIO-ELECTRONICS Mar 1984 (v.55#3) pg. 67
Correction RADIO-ELECTRONICS Aug 1984 (v.55#8) pg. 15

Circuit for a negative-voltage supply uses a 555 timer IC.
RADIO-ELECTRONICS Mar 1984 (v.55#3) pg. 78

How to generate both positive and negative (bipolar) voltages from one nine-volt battery.
RADIO-ELECTRONICS May 1984 (v.55#5) pg. 40

All about power-supply circuits. An in-depth look at practical power supplies and voltage regulators.
RADIO-ELECTRONICS Jul 1984 (v.55#7) pg. 65
Correction RADIO-ELECTRONICS Jan 1985 (v.56#1) pg. 22, 25

Phantom power circuits. How a supply voltage for a device can be carried along the same line with the signal.
RADIO-ELECTRONICS Jan 1985 (v.56#1) pg. 83

Building a simple power supply to operate a 24-volt, 2-amp DC motor from 117 VAC.
RADIO-ELECTRONICS Feb 1985 (v.56#2) pg. 82

A simple solution to power-supply ripple (noise).
RADIO-ELECTRONICS Mar 1985 (v.56#3) pg. 98

Versatile bench power supply. Six-output supply includes two variable, precision voltage-reference outputs among the three pairs of complementary voltage sources supplying up to 100 ma of current.
RADIO-ELECTRONICS Oct 1985 (v.56#10) pg. 53, 85-86
Added Info RADIO-ELECTRONICS Dec 1985 (v.56#12) pg. 20
Added Info RADIO-ELECTRONICS Feb 1986 (v.57#2) pg. 22

Switching power supplies. How to design switching power supplies. Theoretical background and several experimental circuits.
RADIO-ELECTRONICS Dec 1985 (v.56#12) pg. 77, 84-85

Circuit for a power supply that delivers +/- 9-volts.
RADIO-ELECTRONICS May 1986 (v.57#5) pg. 9
Correction RADIO-ELECTRONICS Sep 1986 (v.57#9) pg. 22

Computerized power supply component selection. Computer program, written in BASIC, helps you select the correct transformer, diodes and capacitors for a linear type of power supply.
RADIO-ELECTRONICS May 1986 (v.57#5) pg. 15 (ComputerDigest)

Versatile bench top power supply provides any voltage between 3 and 30 volts, at any maximum current less than 1000 mA. Also includes short-circuit protection, load switching, and switchable voltage/current metering. Est. cost: $50.
RADIO-ELECTRONICS Jun 1986 (v.57#6) pg. 51, 69

Transformerless 5-volt DC, 100-mA regulated power supply is built around the new MAX600 IC.
RADIO-ELECTRONICS Feb 1987 (v.58#2) pg. 92

Computer-assisted regulator design. Computer program, written in BASIC, selects power supply components to provide well-regulated voltages.
RADIO-ELECTRONICS Feb 1987 (v.58#2) pg. 110

Power supply circuit that will generate a variable supply with a 12-volt ceiling and up to 2 amps current draw.
RADIO-ELECTRONICS Jan 1989 (v.60#1) pg. 12

Op-amps show their versatility in instrumentation circuits. Includes circuits for rectifier, peak detector, AC/DC converter, voltmeter, ammeter, ohmmeter, voltage reference, and power supply.
RADIO-ELECTRONICS Sep 1989 (v.60#9) pg. 59

How to pick the correct value of ripple-filter capacitance for a line-operated power supply.
RADIO-ELECTRONICS Oct 1989 (v.60#10) pg. 65

Universal laboratory-grade power supply. Well-regulated supply features modular construction, dual 0-50 volt, 0-5 amp DC supplies and one 5-volt, 3-amp DC supply.
RADIO-ELECTRONICS Mar 1990 (v.61#3) pg. 31, 57
Correction RADIO-ELECTRONICS Apr 1990 (v.61#4) pg. 17

Simple circuit to give both 1.2- to 12-volts DC (variable) and 5-volts DC (fixed) voltages when powered from another 12-volt supply.
RADIO-ELECTRONICS Apr 1990 (v.61#4) pg. 12

Generic linear power supply board can deliver two fixed-positive or one fixed-positive and one fixed (or variable) positive (or negative) voltage.
RADIO-ELECTRONICS Jun 1990 (v.61#6) pg. 41, 69
Added Info RADIO-ELECTRONICS Aug 1990 (v.61#8) pg. 14

Rugged 5-volt, 5-amp test bench power supply circuit based on the 78-series of voltage regulators.
RADIO-ELECTRONICS Mar 1991 (v.62#3) pg. 77

Inside switching power supplies. Part 1. Learn the basics of switching regulators.
RADIO-ELECTRONICS Apr 1991 (v.62#4) pg. 57

Inside switching power supplies. Part 2. An in-depth look at two switching regulator IC families, some applications, and basic troubleshooting techniques.
RADIO-ELECTRONICS May 1991 (v.62#5) pg. 49

Test bench power supply. A variable DC supply with 0 to 15 volts at 1 ampere with less than 2% ripple at full load and better than 3% regulation from no load to full load. Est. cost: $20
RADIO-TV EXPERIMENTER #798 Aug-Sep 1966 (v.21#1) pg. 55

Theory of the Zener diode and how to design your own Zener diode-controlled power supply.
RADIO-TV EXPERIMENTER Aug-Sep 1967 (v.23#1) pg. 53

Experimenter's QV power supply. Designed for either tube or transistor experimenter circuits. Provides B-plus voltage between 125 and 175 VDC up to 40 mA. Filament supply of 6.3 VAC at approximately 1 A. Regulated 6 VDC up to 40 mA.
RADIO-TV EXPERIMENTER Dec 1967-Jan 1968 (v.23#3) pg. 78

Circuit for a power supply with a 110-volt AC input and a 6- or 12-volt DC output, at up to 3 amps.
RADIO-TV EXPERIMENTER Aug-Sep 1968 (v.25#1) pg. 40

Universal regulated power supply for solid state devices. A 10-volt output at a maximum of 300mA that is both voltage and current regulated.
SCIENCE & ELECTRONICS [1] Feb-Mar 1970 (v.28#1) pg. 49

Modular test instruments. Part 1. Build your own voltmeter boards and power supply boards which will be incorporated into other instruments.
SPEAKER BUILDER 3/1983 [Oct 1983] (v.4#3) pg. 12
Correction SPEAKER BUILDER 1/1984 [Mar 1984] (v.5#1) pg. 37