Marantz 5220 Manuel d'utilisateur

ATHEFT ALARM FOR HANDHELD CALCULATORS E e tif WORLDS LARGEST-SELLING ELECTRONICS MAGA '" --` ARCH 1 976/7 e EXCLUSIVE Build the "PENN

VVhere do the pros het their training? Almost half of the successful TV servicemen have home study training and with them, it's NISI 2 to 1. It&a

illit)CKET CALCULATOR 5 function plus constant - addres- sable memory with individual recall - 8 digit display plus overflow - battery u stan

BURGLAR ALARMS BURGLAR ALARM dialing unit automatically calls police. $29.95. Free literature. S &S Systems, 5619 -C St. John, Kansas City

r i,H 7400N TTLfrfrIft SN7400Ne 5574015 13 16 S574534 S574545 27 41 S4741485 S5741504 2 50 1 10 51174025 21 5574595 25 S4741515 1.25 SN7403N 16

CRYSTALS t-_ Pan Frequency Case Style } Price CY1A I 000 MHz HC33 /U 54 95 DY2A 2 000 MHz HC33/U $4 95 DMA 4 000 MHz t. Mar' MHz HC18 /U HGI

TREASURE FINDERS FREE FACT -FILLED CATALOG! World's largest selection! Metal detectors starting at $79.50. Two year guarantee! Three facto

ARIES brought you the first calculator kit, and the first digital clock kit ... and now brings you three of the most innovative electronic kits

PARTS ONIC HDTACCESS HIES ANBANNANFAICAAA macler cnarge 500 -ft. Hookup Wire Kn W W 579 1.69 3-6V DC Mini Hobby Motor. KiV5 MO -333 .55 3-6V D

Popular Electronics MARCH 1976 ADVERTISERS INDEX READER SERVICE ND. ADVERTISER 113, PAGE NUMBER 38 99 118 .119 83 111 107 81 117 l 22, 23, 24. 25

LIVE IN THE WORLD OF TOMORROW. .. TODAY! And our FREE 164 PAGE CATALOG is packed with exciting and unusual values in electronic, hobby and science it

Pick -A- Pickering ® o000 (4® 0 ,Goo c) c) r> D Vh JO Occ7CCr>c, o o looF7,. L-+ Its the least expensive way to make the greatest improvement i

A national survey *, performed by an independent research organization, showed that the pros named NRI most often as a recommended school and

u For several years, independent surveys of component owners -audio experts, hifi editors, record reviewers, readers of the music /equipment magazines

The $7O alternative. 0200 Watts RMS, per channel, both channels driven into 4 or 8 Ohms from 20Hz to 20KHz at no more than 0.05% Total Harmonic Di

,4:ail:i.s4.ai.i11. iY i i c . a .. L e * * * ! e: . it1 A-A -A '. R:w ásy,>Z.áSiZ s.-QiEs d ALTAIH66C Now, you can buy an Altair 8800 o

itself; is said to accurately record rainfall up to 100 feet away, by tenths of an inch, to 999.9 ". Accumulated total inches of rainfall for

Front panel plugs into Mother Board, thus eliminating the work of soldering all the wires from the front panel to the Mother Board. Sturdy Card Cag

PIONEER INTRODUCES AN AMPLIFICATION SYSTEM THAT WILL FORCE YOU TO TAKE A HARD LOOK AT YOUR SPEAKERS.

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mV /cm minimum sensitivity. Fastest sweep rate is 20 ns /cm using the 10X sweep ex- pander. Features an 8 x 10 cm CRT with 12 kV anode supply, bea

SBE Formula D The state -of -the -art in fifty states Stated simply, the SBE Formula D transceiver is in a class by itself. It's the one full

e dorit just talk We build quality. That's why Cobra CB radios are engineered and built to operate at peak performance under all conditiois.

Stereo Scene TONE CONTROLS, PLAIN AND FANCY ONCE again a number of high - quality preamplifiers is being of- fered without tone controls. The philo-

At TEAC, our funda- mental mandate for any new product is performance and reliability. First and finally. Qualities that are measurable in terms of me

Is there a little of the Thomas Edison in you? As a kid, were you one of the first in your neighborhood to make a walkie- talkie out of a couple of ti

50 40 20 10 25 31.5 100 315 IK 3.15K 10K 20 Hz Fig. 2. Dynamic spectrum of a popular recording, measured on the same analyzer as Fig. 1. At first g

en9ineer's triumpn.. operc4or's Improving what is already the best is the ultimate challenge for the engineer. And the ultimate reward for t

What are your opportunities in the electronics field? Here are some eye opening facts from ETI. QWhat about the job market in electronics ? AIt's

AYou don't have to take time off from your job. You study at home, in your free time. We do advise, however, that you set aside a certain time fo

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HIGHLIGHTS Digital Watch /Calculator Time Computer, Inc. has come out with a combination Pulsar quartz timepiece (hours, minutes, seconds, month,

Why is the 280 at $9995 our fastest selling multimeter ever? Ever since we introduced the 280 last year, sales have been breaking records. The reas

The Black Watch kit At $29.95, it's *practical- easily built by anyone in an evening's straightforward assembly. *complete -right down to st

0 DB EQUALS I WATT 12 9 6 3 0DB 3 6 9 12 15 18 AUDIO POWER METER ON CONSTRUCTION An LED - Readout Audio Power Meter BY TIM HENRY Measures amplifier

RI 600X1 7 R2 LIK R3 220 11 4 5 R4 910 11 R5 33X1 R6 620 n R7 4311 9 ICI MC3302P13 12 LEDI 64W R17 471 LED2 32W LED3 16W R19 4711 // LED4 8W 14 BPI R3

causing possible damage. The diode also rectifies the signal so that the meter can indicate a somewhat aver- age power rather than peak power,

TABLE I- VOLTAGES FOR SELECTED POWER LEVELS Power Voltage Voltage Voltage (watts) (across 4 ohms) (across 8 ohms) (across 16 ohms) I/16 0.5 0.707

1.4 1.2 1.0 handled distinguishes the two mejor types of nickel- cadmium batteries from each other. In vented cells, the gas is simply released

TABLE I- TYPICAL CHARACTERISTICS Size Capacity (AH) Internal Resistance (milliohms) Max. Charge Rate (mA) 1C Rate (A) AA 0.5 35 50 0.5 C 1.0 10

long as the charge rate is kept below 0.1C, which means that current at the rate of 0.1C or lower can be supplied indefinitely to the cell. Hi

THEFT ALARM FOR HANDHELD CALCULATORS BY TOMMY N. TYLER HANDHELD calculators are a prime target for thieves because they can be quickly picked u

BY LEE FELSENSTEIN Build "PENNYWHISTLE" The Hobbyist's Modem Under -$100 interface for digital data transmission /reception over chann

Who builds the best value in electronics today ?... YOU D When you build any of the over 400 superb Heathkit electronics products described in our ne

> Fig. 1. The modem receiver uses noise- reducing active filtering before its PLL detector and delivers both 20-mA and EIA- compatible outputs.

D5 to D8,D11 to D14- 1N4001 rectifier diode F 1 -3AG, 1/2- ampere slow -blow fuse with pigtails LED1, LED2-Light- emitting diode (one red. one

MODEM , AUDIO OUT E3¢ E4¢ AUDIO IN AUDIO OUT GND AUDIO IN i (A) 9DAA DT 60011 ç DR VOLTAGE HERE IS EQUAL TO AUDIO OUT IOK VOLTAGE,BUT OF OPPOSITE

the world's largest selection of superb electronics products in FREE S ° easy-to-build kit form Amateur Radio SB -104 Digital Broadbanded, SSB

tHE LARGO LA TOG WORLD'S KItCA p RNC te E,ECt accurate fions pages... complete, spec ¡f ira descriptions ° des Q0p easy-to-build °f oser its in

should have 3/16" (5 -mm) thick polyurethane foam lining their sides. Punch a hole in the bottom of each can to allow wires to pass through

feed a signal into the second stage of the filter. To record local terminal data, plug the tape recorder's microphone input into J1 and set the

IF YOU'RE anxious to hear distant stations on the AM Broadcast Band -say, to catch blacked -out home -town sports events -then the Broadcast

(1.9 -cm) doweling. File six grooves 3/8" (9.5 mm) apart on the dowels, spacing the outer ones 3 /e" (9.5 mm) from each end. Take a 121/4 -

A note about capacitor C1 -any surplus, multi -gang variable capacitor may be used. Total maximum capaci- tance should be about 1200 pF. As of pre

MARCH 1976 VOLUME 9, NUMBER 3 Popular Electronics® WORLD'S LARGEST SELLING ELECTRONICS MAGAZINE FEATURE ARTICLES THE CARE & FEEDING OF NiCd

HOW TO MINIMIZE SCOPE /PROBE COMBINATION ERRORS Hewlett- Packard 1125A active probe. Choosing the right probe for a particular application can reduce

4 The Tektronix Pf;Q,, probe, with FET isolation stage, prnpides signal uttennatiun of 1:1. 10:1, u 100 :1 with I..5-Ms rise tim,. most new scope

capacitance. Now what is their com- bined effect? Figure 2A shows a typi- cal pulse source, with an internal im- pedance of 250 ohms and shunt

DE PENDABLE PERFORMANCE N W E CB 166 «p» PACE He is fast on his feet. A great run. He scores...A dependable per- formance based on ability. And then

CONSTRUCTION BY SAMUEL LYLE CURVE TRACER Checks Semiconductor Quality from Breakdown Voltage to Beta ASIMPLE go /no -go tester will tell you if a tra

5 WAYS TO STOP WASTING TIME IN ELECTRONICS. 1 Stop wasting your time soldering. Save hours of soldering, desoldering, re- soldering with QT sockets an

TI R3 R4 R5 TOOK 470 IM Fig. 1. Basic circuit ends at J1 and J¿. The dread to the right is used to test tran.sistO)'s. PARTS LIST J1 to J5

WORLD NEWS is breaking fast! HEAR RAS IT HAPPENS... Get that news direct from the source of the action ... and listen to a world of music direct fr

How Multiplexed LED Displays Simplify Circuits BY PATRICK J. DELANEY III ACONVENTIONAL digital readout system for LED's consists of a counter

tal electronic circuits as shown in Fig. 2. The components in this circuit can be bought from almost any "blister package" rack. The three

Popular Electronics' EDGAR W. HOPPER Pubiish,'r ARTHUR P. SALSBERG Editorial! Dir,s tar LESLIE SOLOMON Techn ica! Editor JOHN R. RIGGS Man

The better the training better you'll 1N- CIRCUIT TRANSISTOR TESTER TROUBLESHOOTER COMPU- TRAINER VOM .. ELECTRO -LAB SOLID -STATE OSCILLOSCOPE N

and the equipment be equipped. HIGH FIDELITY SPEAKERS o CU: SOLID -STATE STEREO AM /FM /MULTIPLEX RECEIVER COLOR BAR /DOT GENERATOR TUBE & TRANSIS

Product Test Reports ABOUT THIS MONTH'S HI -FI REPORTS One of the more versatile models in the new Marantz line of cassette decks is the front- l

+5 0 STD NORTRONICS AT -20n 20p, +5- o- MARANTZ 5220 PLAYBACK RESPONSE ... .. . .. !. Cr02 ... TEAC 116SP TOy9 t FREQUENCY (Hz) 4i. 0000 p0000 ,1

We liked the front -loading feature. The cassette Can be seen clearly in the compartment if it is close to eye -level. Below eye -level, however,

output, measured below the noise level. It was about 0.08% from 3 to 10 watts, and reached 0.6% at 14 watts output. The IM distortion was betwee

since it tended to exaggerate the tun- er's background hiss. The calibration of the FM dial was very accurate, limited only by the width of

slightly square off. Nevertheless, splatter was held to 55 dB or better. The audio response was 600 to 7000 Hz at 6 dB. The frequency tolerance of t

If you can't to college for your career in electronics read this! CREI brings college -level training to you with eight educational advantages, i

Career Training at Home 5. Unique Laboratory Only CREI offers you the unique Elec- tronic Design Laboratory Program. This complete college laborato

WHY SETTLE FOR LESS - THAN A COMPLETE 6800 SYSTEM MEMORY - All static memory with selected 2102 IC's al- lows processor to run at its maximum

The timing functions available take some explaining to understand how they differ from each other. Let us take a function -by- function look at them

(you don't have to buy a new car to get an electronic ignition.) volts through the car's ignition coil. A special RC network in the CDI sys

siiu!M1T g Solid State OPTING FOR OP AMPS CONSIDERED as a class, operational amplifiers are perhaps the most versatile of all integrated circuits.

value from 10 to 47 kilohms. With a value of 10 kilohms, overall gain will vary from approximately 5 to 38 dB as the FET's gate voltage is s

I I7 VAC Fig. An opto- coupler controls triac gate current. 1700 -Hz range. Increasing the operating frequency is eas- ily accomplished by further re

Test Equipment Scene USING YOUR OSCILLOSCOPE MUCH of my mail has to do with questions about oscilloscopes and their use. Here are some common pro

Have you ever asked yourself, "Can make it in Electromes ?' CIE may be the answer if you have a technical aptitude and a serious desire to

specialized Electronics Instruction Staff. Our lessons reflect this specialized experience. No frills. No unneces- sary fancy stuff. Instructi

. Computer Bi ts ... :;;`.. COMPUTER USERS TAPE SYSTEM THE LACK of standardization is the bane of many industries. For example, three basic four

corders. In addition, FSK is more ex- pensive to implement than many other methods. Double -frequency recording (DFR), shown in Fig. 1F, is often u

Crown The Known Value... at an uninflated price! An honest value isn't hard to find, if you know an honest supplier. CROWN's reputation for

AUDIO FROM- - RECODER NiGN-oASS Fi[TER Fw. !. llirr th) ('urryrrr/rr l'xr°r.. Tripe System WITS). AUDIO LOW -A95S f RECOPDiER '11-7&qu

\\ 417/SLI\\\ aCIR\F1""... \LAW DX Listening SHORTWAVE NEWS FROM ALL OVER DX LISTENERS in western North America have long felt frustrated

QUAL' catalog over 2000 unique tools, handy kits, precision instruments, technical supplies. Our 23rd year of service to the World's finest

8:00-10:30 p.m. 8:00- p.m.-12 mdt. 8:30-8:50 p.m. 8:30-8.55 p.m. 8:30-9:25 p.m. 8:45-9:15 p.m. 9:00-9:30 p.m. 9:001:45 p.m. 9:00-9:55 p.m. 9:00-10:0

r WHAT'S HAPPENING TONIGHT? í'tt9tttt now $132.50 The BEARCAT IV. The ultimate scanning monitor. Hear any eight channels of action, e

CB Scene By Ray Newhall IS YOUR STATION READY FOR AN EMERGENCY? MUCH has been written about the public safety potential of the many CB radio s

INTRODUCING VDM -1 .7-:,yAm:y41i e, Mai *ti4;10 ?. Yevlq. Y!. Sri ¡mega e:.f I:me d N eVrn .r :e ..11..11 .»" er-_ 1:á. l;e I ID. MAO. LT VIDE

Hobby Scene/ , By John McVeigh DIMMER RFI Q. I replaced several of my wall switches with triac dimmers, but now experience severe interferenc

decora- copies, ke and make i any issue a tive and attractive to enhance the decor of any room -each case is designed to hold a full year&apo

Elïctrmnics Library brary INTERNATIONAL DICTIONARIES OF SCIENCE AND TECHNOLOGY: SOUND edited by R.W. Stevens Scientists and technologists of eight

For the $400 -class CB customer Realistic has what's really new and 4000 places to find it. r Reading time 48 seconds: Not everyone has four C -

Experimenter's Corner PERCUSSION INSTRUMENT SYNTHESIZER THANKS to John Simonton, and Don Lancaster, this magazine has featured articles on virtua

ISO TIP QUICK CHARGE Recharges in 1 /3rd the time of any other cordless iron. Complete line of accessories available: No. 7566 Micro Soldering Ti

ALTAIR 8800 VIDEO TERMINAL Video Interface. Plugs into the Altair or IMSAI 8800 bus and connects to standard TV monitor (or modified receiver). 8

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- CONTINENTAL PROTO BOARDS Build & test PB700 101C P13101 10 tie P8102 12 points, PB103 24 points, PB104 32 8.0 LOGIC Simultaneously r stati

TV TERMINAL III $134.95 Complete with plated boards, TTL, res, caps and 1K memory Add 1.50 shipping, handling, insurance NEW BAUDOT to ASCII

SIX DIGIT LED ALARM CLOCK KIT Thousands of hobbyists have bought and built our original clock kit and were completely satisfied. But we }lave receiv

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SPECIAL. 4 DIGIT ALARM CLOCK KIT Features the only LED direct drive 5 clock chip on the market. Kit Includes all parts (except X fmr) for a