Silicon Valley Computer SHUGART 706 User Manual Page 0

Radio - TELEPHONE C entreeì -rr'"NOLOr-lV - VIDEO - STEREO - COMPUTERS - SERVICE 1 20[1 It generates special video effects Find hidden signa

8 "If you're going to learn electronics, you might as well learn it right!" "Don't settle for less. Especially when it comes

108 I IBM MT STYLE COMPUTER CASE AN ATTRACTIVE STEEL CASE WITH A HINGED LID FITS THE POPULAR PCrXT COMPATIBLE MOTHERBOARDS SWITCH CUT OUT ON SI

12008 MODEM $9995 WARE' 24008 MODEM $ 19995 MULTIFUNCTION CARDS FROM MODULAR CIRCUIT TECHNOLOGY MCT-MF $79.95 ALL THE FEATURES OF ASTS SIX P

5 95 7 95 10 95 7 95J r 1.0,A 6.8 10 22 22 101d 22 27 33 47 68 100 220 560 CAPACITORS TANTALUM 15V .35 .4711 15V .70 1.0 15V .80 2.2 15V 1.35 4.

PUT US TO THE TEST! AF Signal Generator 5139 Q-1310 Square/Sine wave output audio signal generator, essential for work on huge range of circuits.

112 ka ' f 1-800-344-453 9 C O R P O R A / N AK, Puerto Rico 2184181 .15674 Tale - E2E27914 FAX - 21Ea1 Tä0 TWX 910.7E014E2 DIGI KEY

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oYr u've probably seen adver- tisements from other electronic schools. Maybe you think they're all the same. They're not! CIE is

Components and Adaptors Coax Cable /Patch Cord Assemblies Tap -A-D.p 14 816 Pin Test Connectors SIGNAL ACCURACY. 12,000 Reasons Why Industry Relies

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Pride, quali When you unpackage a Heathkit product, you open up a special world, a world providing a unique blend of achievement and fun. With your H

funmileathldt Enter the Heathkit world with... . .-.. . . ' . ! .. The Heathkit ID -4001 Weather Computer, which puts weather information at y

16 dicated the maximum screen di- mension in inches instead of the heater (or filament) voltage. Thus 5BP1 was a tube with a 5 -inch scr

Oops Proof. Now Even Better. Industry's Most Popular Heavy -Duty DMMs.. . Now Even Better With Dual -Fuse Protection And A Tougher Case. The toug

18 Train with NRI for a servicing NEW! Train with the newest Sanyo 880 Series CornPr_ft's fully IBM-compatible and runs almost twice as fast as t

high paying career computers MONITOR -High .msoluöort ¡Iran screen dispays, crisp t te't and graphs s. ., TECHNICAL MANUALS -with complete s

Light weight makes the 2225 easy to carry even to remote servicing sites. Fully segmented grati- cule lines ease the way for quick, accurate voltage a

EQUIPMENT REPORTS Onkyo Unifier Universal Programmable Remote Control A single handheld remote control for all your audio and video needs. CIRCLE 12

and a 3- position slide switch on the front panel, the remote is sur- prisingly easy to program, and even easier to use. The Unifier incorpo

V209 DC to 20MHz, Dual Channel Mini -Portable Scope 3.5" CRT with 1.5kV Potential 3 -WAY Power Supply- AC, DC and Built -in Battery Pack Ver

DESCRAMBLER ARTICLE PARTS February 1984 Issue We stock the parts, PC Board and AC Adaptor for an article on building a cable TV descrambler appea

U) U Acct No Ex p--./_ ; ó PLEASE PRINT CLEARLY I Name O I Address Apt x LI City - - -- - I IState ZIP E Phone ( ) CC I Sign Here 26 f =f-- f

The model SKM411 is a single - outlet electronics protector, and is priced at $22.15. The model SKM411 is a single - outlet microwave protecto

28 (Ste rl TM precision drills variable or constant speed ... from the Maxi to the Mini! Craftad in West Germany, the nigh- speed, low - voltage,

EQUIPMENT REPORTS continued from page 23 Using the Unifier The Unifier is no more difficult to use than any standard remote control -once you g

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September 1987 É...+a Vol. 58 No. 9 BUILD THIS 41 VIDEO EFFECTS GENERATOR Tailor your video like a pro. Rudolf Graf and William Sheets 46 SCA RECEI

J THE MOST POPULAR WIRE -WOUND CB ANTENNAS IN THE WORLD Because... they perform! FACT When CB was legalized in England, FNesMe antennas were b

The circuit A schematic of the circuit is shown in Fig. 1. The input section determines whether the logic level is high or low, and enable

34 Get A Complete Course In ELECTRONIC ENGINEERING 8 volumes, over 2000 pages, including all necessary math and physics. 29 examinations to help you

delayed pulse from any of the other output pins; the choice of pins is determined by the amount of delay needed. By using a binary counter li

36 Electronics and Control Engineers' Book Club® ADVANCED DIGITAL COMMUNI- CATIONS: Systems and Signal Processing. Edited by K. Feher. 768 pp.

TELEVISION ENGINEERING HAND - B OOK- -By K. B. Benson. 1,478 pp., 1,091 illus. Packed with the technical information and know -how you need to

ARM YOURSELF AGAINST STATIC WITH NTE; PATENTED FIELD SERVICE KIT. Static electricity is a real hazard to sensitive electronic equipment. Now you can

032 L THERE ARE MANY INSTANCES IN VIDEO work when it is desirable or necessary to modify a video signal in one way or an- other. In the home,

42 FIG.1 -THE VIDEO PALETTE'S EFFECTS CAN BE STACKED. In this black and white series, a is a normal picture, b is posterized, c has s

r VIDEO LOOP THROUGH VIDEO IN DCA Ó S4 T 0 r BYPASS SWITCH Sta TERMINATION & DC BLOCK GAIN INPUT VIDEO AMPL S1 7M! SYNCH SEPARATOR V SYNCH H SYNC

2 ON THE COVER Radio Electronics If you have ever wanted to take complete control over the ap- pearance of your video productions, this month&ap

44 BLACK BLACK BLACK ó GRAY GRAY ó oo GRAY WHITE ) 1 WHITE WHITE 0 5 5 ORIGINAL SIGNAL VOLTS OV --1V BLK I, W T VIDEO SOURCE OV 1V R1 VOLTS V -U- b R

now there is h volt across RL. (With a high -gain comparator, a few millivolts change in the video level produces an abrupt 1/4-volt chan

46 Part 2 LAST TIME, WE looked at the cir- cuit for an FM- stereo /SCA receiver. This month we'll show you how to build that circuit. Const

Discover -Explore- Experience Today's Electronics With Now you can meet the challenges of today's electronics quickly and easily. This profe

50 i 1 I -R46 - C28 - R30- (,39 R34 I 1 C23 1 i C42 -CBIì --R51- g 5 C75 R29 R26 1 R24 R22 -L8- R49- R52- Q6 I C34 C26 Ft-3 I C 5I I C 04 - . R50 -

Resistors 1 watt, 10% unless otherwise noted R1. R3. R7, R8, R10. R46, R60- 100,000 ohms R2- 47.000 ohms R4, R25. R28, R68, R70 -100 ohms R5,

52 ADDING A FILTER Cl FROM 2200pF 06 )1 COLLECTOR L1/C2 L2!C4 R1 4700 'M C3' 1000pF C5 220pF LI' C2' L2' C4* 1000pF 1000pF

INSIDE CELLULAR TELEPHONE NOT SO LONG AGO, WHEN ONE THOUGHT of a telephone, the image conjured up would be of a jet -black, rotary-dial, elec-

54 FIG. 2 -A CELLULAR SYSTEM DIVIDES its region of service into a number of small cells, each with its own cell site containing a low -power tr

MOBILE CELLULAR / \ 825 835 845 851 FIXED CELLULAR (CELL SITESI n 890 896 870 880 NONWIRELINE (AI SERVICE WIRELINE (BI SERVICE RESERVED FOR EXPAN

$75 DMM MEASURES CAPACITANCE, TRANSISTOR HFE, MORE... !3 \h l'III CISIONS new 2905 is a mo-e -than -full -r 31/2 digit DMM, at a surprisin

56 L R -E ROBOT Here's an application that can give a robot builder great "joy" Part 10 Now that we've finished building the Rob

r All of the code we are going to write will fit into six Forth screens. Therefore, you do not need a disk drive. You can use the RAM word t

60 LISTING 1 (continued) Scr #35 0 / joystick - left motor control 1 decimal 2 : leftmotor 3 lspeed @ 4 if lfwd 5 lspeed @ 6 if lrev 7 the

Op -amp characteristics and how to measure them Part 6 THIS MONTH WE'LL turn our attention to a device that is a staple in electronics: the

62 FIG. 2- MEASURE INPUT OFFSET VOLTAGE by grounding the non -inverting input. With a bi- polar power supply, the inverting input is held at virt

mally you see it expressed as the com- mon -mode rejection ratio. The common - mode rejection ratio is an important -yet often misunderstood- pa

64 L USING TRIACS AND SCR's SCR's and Triacs are high- speed, solid -state switches used in AC- and DC -power control applications. Find out

TABLE 1- POPULAR SCR'S Device PIV Current rms/average VcT (max) IGT (max) IM (max) C106D 400V 4A/2.5A 0.8V 0.2mA 3mA 2N3525 400V 5A/3.2A 2V 15m

66 81 R2 4.5V 2.21 i Cl 1µF 10V FIG. 8- RATE -EFFECT TURN -ON: Note that the SCR has no input signal connected directly to its gate. Closing S1

TABLE 2- POPULAR TRIAC'S Device PIV Current rms VGT (Max) IGT (max) IH (max) C206D 2N6073 C226D SC146D TIC246D 400V 400V 400V 400V 400V 3A 4A 8

4 WHAT'S NEWS New chips to have more accurate spacing Using a new technique known as mask -proximity correction, re- searchers at General

68 LOAD WAVE- FORM LINE INPUT 10 °DELAY o 180° 0° 90 DELAY - 110' DELAY FIG. 16-A VARIABLE AMOUNT OF POWER is delivered to the load depe

PC SERVICE One of the most difficult tasks in build- ing any construction project featured in Radio -Electronics is making the PC board using just

PC SERVICE 70

COMPUI ERÏGÉS 19 A NEW KIND OF MAGAZINE FOR ELECTRONICS PROFESSIONALS BONDWELL 8 NEC MULTISPEED TOSHIBA T1100 PLUS DATAVIEW 25 IBM PC CONVERTIBLE

72 CONTENTS SE PTEMßE R 1987 .n o9 77 PORTABLE COMPUTERS Hands -on reviews of seven hot portables II IS 1:1='. Pr/ONS L=1:111== 1113111111->

EDITOR'S WORK- BENCH 7 REPORT FROM ATLANTA Comdex, held twice a year, is the Com- puter Dealer's Exposition. As the name suggests, dea

74 each other and to other programs, etc. It may turn out that OS /2 is the only major program written for the 80286! The editor of a leading compute

R -E Computer Admart ICsPROMPT DELIVERY!!! V AME DAY Sr41PP N(. iIISUALLYi ... Nio, uNt ri in T. OUTSIDE OKLAHOMA NO SALES TAX DYNAMIC RAM 1Mbit T

76 disks of the Toshiba and Zenith laptops-all with a single command. However, after ini- tial set -up we found Direc -Link easier to use, especia

PORTABLE COMPUTERS BONDWELL 8 1EC MULTISPEED TOSHIBA T1100 PLUS We evaluate seven portable PC compatibles. DATAVIEW 25 IBM PC CONVERTIBLE JEFF HOLTZ

:ill: I )H INSTRUMLNiS ILL ;PI _1.238`° of V t( 70mA r . F. frt. nrA . (:(1M V ti DMM-300 =79.95 3.5 DI..T DMM tMULTITESTER et, bras model. A Ni

t FIG. 1- Bondwell 8 111 is MINA BIM NINA Ail nm man sNUB flail ONO FIG. 2- DatuVue 25 a al en gill I®lia al amza >iHMICM EIS 11111121111111111

250 ?00, 501 Q BONuwtLL a ounuwtu a DATAVUE 25 UAIAVUE 25 DRIVE A DRIVE C DRIVE A DRIVE C FLOPPY RAMDISK FLOPPY HARD 4.77MHz 4.77MHz 4.77MHz 4.77M

80 One quirk is that to format a floppy for 720K capacity, which is standard for 31/2 disks, you must add "/3" to the FORMAT command. Oth

the manner of Radio Shack's low -cost non -DOS machines. The MultiSpeed has 512K of ROM -based software, including a word processor, an outl

82 HIGH -RES HIGH -SPEED GRAPHICS CO-PROCESSORS Great new graphics processors jazz up computer displays like never before. JOSEF BERNARD Video games

What is it that makes those graphics devices so special? A few quotations from Intel's spec sheet for the 82786 will give you an idea (and

84 The TI processor comes in a 68 -pin square PLCC (Plastic Leaded Chip Carrier) package, the Intel device in a slightly larger 88 -pin package.

` :°cR9Ho°o°o°óó 9° 00000000000000r 0000000000C 00000000C' 0000óc ó00°O°OC 000000C o95 t.. 00 : ... 0.111.0 a b FIG. 5- RESOLUTION is determined

86 R -E ROBOT continued from page 63 ATOD takes the channel number from the top of the stack, duplicates it, and stores it (using PC!) at I/

SATELLITE TV The international connection THE FAR -REACHING COVERAGE OF GEO- stationary satellites has been well known, significantly documented,

6 VIDEO NEWS DAVID LACHENBRUCH, CONTRIBUTING EDITOR Video numbers. As of June 1, 98% of all U.S. households had TV sets of some type. Breaking that fi

88 viewing, either inside or outside the region where they have distri- bution rights, is to encrypt the sig- nal and only accept fees from peo

SERVICE CLINIC continued from page 30 simplest ways of hunting for an open bypass is to bridge each one with a known -good capacitor and watch the

90 Radio- o 0 Electronics DThIDiI Dp,g WITH "TV LINE GRABBER" LOOK AT IN- DIVIDUAL LINES of composite video with your oscilloscope in e

Radio- Electronics ThITh1 0 THE ULTIMATE COMPUTER. IBM- compati- ble 8 MHz TURBO -XT system. Fully expan- dable, up to 6 extra cards, 3 ex

R -E Engineering Admart CALL NOW AND RESERVE YOUR SPACE 6 x rate $800.00 per each insertion. Reaches 242,400 readers. Fast reader service cycle. Sho

CELLULAR TELEPHONE continued from puke 55 knowledge of A and B services to that indicator, causing it to flash if the service it encounters i

STATE OF SOLID STATE Micropower op-amp PRECISION MONOLITHICS, INC. CLAIMS that their new OP-90 micropower op -amp sets new performance standards

MARKET CENTER FOR SALE TV tunable notch filters, free brochure. D.K. VIDEO, Box 63 6025. Margate, FL 33063. (305) 752 -9202. VIDEO surveillance sy

96 RADIO tubes. Send $1.00 (refundable) for exten- sive lists. DIERS, 4276 -E North 50th Street. Mil- waukee, WI 53216 -1313. TUBES, name brands

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MAKE MONEY Do You REALLY Want to Make More Money' Yes it does take work and a few sacrifices to climb up the electronics ladder to wh

98 CRYSTAL radio sets. plans, parts, kits, catalog $1 00 MIDCO, 660 North Dixie Highway, Hol- lywood. FL 33020. CATALOG: hobby broadcasting 1

Plug a Friend into Radio -Electronics this Christmas ... and Save $12! This Christmas give an electrifying gift ... plug a friend into Radio- Elect

DESCRAMBLER. Build our low cost satellite TV video only descrambler for all major movies and sports. Uses all Radio Shack parts. Order P.C. boa

Here is just a sample of what you'll find at MCM Electronics Tenma 15MHz Dual Trace Portable Oscilloscope Dual trace model capable of dis

Neil Order Elthonics worldwia Mail-Order E lameco ELECTRONICS FOR ORDERS ONLY ALL OTHER INQUIRIES 415- 592 -8097 415- 592 -8121 NEC V20 at V30 CHIPS

Worldwide Since 1974 lameco Mall Order Electronics. Worldwide ELECTRONICS QUALITY COMPONENTS COMPETITIVE PRICING PROMPT DELIVERY Jam General Purpo

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What's New at AMERICAN DESIGN COMPONENTS? "The Source" of the electro- mechanical components for the hobbyist. e warehouse 60,000 it

106 8000 8035 1A9 8039 1.95 8052AH BASIC 34.95 8080 2.95 8085 2.49 8087 5 MHz 129.00 8087 -2 8 MHz 169.95 8088 6.95 8088 -2 9.95 8155 2.49 8748

9.95 15.95 14.95 7.95 9.95 9.95 7.95 4.95, ga) IC TEST CARD QUICKLY TESTS MANY COMMON ICs DISPLAYS PASS OR FAIL TEST 40005 74HC SERIES CMOS. 7400 7