BREAKTHROUGH! First Minicomputer

1 HOW TO "READ" FM TUNER SPECIFICATIONS 7t ioiiIc $ WORLDS LARGEST -SELLING ELECTRONICS MAGAZINE JANUARY 1975/75 PROJECT BREAKTHROUGH! 1 Mild's First Minicomputer Kit to Rival Commercial ALTAIR 88U0" SAVE OVER $1000 { A LTA 1R 8800 let F In au an l {0 a, O, OS ci tt n Os 1. PAX: T- f S i Q 11 . J `/ t MOO '4, _ _ , - .. r . !w tn. LIS All tl U at = Al {{ U /11. At at {O O 6 G .. t O in 9 AlOS u 11 tt 1! 11 uMu ' tnr uuw aMut - t- . sr MOW .a ' . 4 ALSO IN THIS ISSUE: An Under -$90 Scientific Calculator Project o,ae CCD's-TV Camera Tube Successor? . r'`?99` Thyristor-Controlled Photoflashers . ;- lSt le Q 0' .aa, - TEST REPORTS: Technics 200 Speaker System Pioneer RT-1011 Open -Reel Recorder Tram Diamond ,6. 3:cr Nvs f g COGN311 Aw 551 Edmund Scientw sr.}}}}}

2 1121abEi 1 i4 Hewlett-Packar , t 9teat C6451CC479 kxG' 96IC4 18101 `. t : 'Pioneer believes t at any objective 'pomparison of quality/performance/ {price between our new SX-1010, SX-939 and SX-838 AM -FM stereo ,receivers and any`other fine receivers twill overwhelmingly indicate Pioneer's Outstanding superiority and value. The most powerful ever 'Pioneer uses the most conservative power rating standard: continuous power output per channel, with both hannels driven into 8 ohm loads, across the full audio spectrum from - 1 111 ,, I ,1 . ut tt ..: W,a, .r ' 411" J a,, oh AIAN ;; .. , ,t Kt 20Hz to 20,000 Hz. Despite this conservalsr, the SX-1010 far surpasses any unit ever produced with an unprecedented 100 + 100 watts RMS at incredibly low distortion.}

3 - Closely following are the SX-939 (70 + 70 watts RMS) and the SX-838 (50 + 50 watts RMS) both with less than distortion. Dual power supplies driving direct -coupled circuitry maintain consistent high - power output with positive stability. A fail-safe circuit protects speakers and circuitry against damage from overloading. toro voLuME er ' li,. 102 104 106 108 MHz I11,1111111 ,-,i, .! ,.i , ,..,:.., .,.. Qt AD 166 r,OhH7 .<K>1 ; LC Jri . ( Di lri Lea t wfr Outstanding specifications for flawless reception FM reception pcses no challenge to the -exceptionally advanced circuitry of these fine instruments. Their FM tuner sections are designed with MOS FETs, -ceramic filters and phase lock loop circuitry. The result is remarkable_ _ sensitivity, selectivity and capture ratio that brings in stations effortlessly, clearly and with maximum channel separation.)

4 - - SX-1010 SX-939 SX-338 FM Sensitivity (IHF) (the lower the better) Selectivity = 90dB (the higher the better)_, Capture Ratio 1dB (the lower the better) 80dB- 80dB E, 1dB 1dB Signal/Noise Ratio 72dB 70dB (the higher therbetter)L Total versatility plus innovations Only your listening interests limit the capabilities of these extraordinary receivers. They have terminals for every conceivable accommodation: records, tape, microphones, head- sets - plus Dolby and 4 -channel multiplex connectors. Completely unique on the SX-1010 and SX-939 is - tape -to -tape duplication while Ilistening simultaneously to another program source. The SX-838 innovates with its Recording _ WpION(:U4 $TE FIE O RECEiVER MODEL $K101O ;\ ..>_ SP SP -13 Ee 4-4.)

5 FFKR{1 ' tesw-4 C 1 WWvtR * Q ;n C riw q, . tu*a rUwa : a . cr,aau , AM 88 99, 92 I,1J1 nI1J 55. s v' ~cur ' -mEi - . aF h3 : . ' iP i UPKR-g F -C Iu^ ! awo/e un,+co FM AM EtASS e" t (J) C IpN . S7 EREC RE[:t_IVER`MO OEl 9> 4339 ~ (:YqR POWER w PIONECJ2 STE-RF,3 RECEIVER MODE I. EX 933 . _ --- 3P.^^ . ' ' 111-< 6=.cR- .y.(R-R .rPM7-Ci ESA BS .OPtl o, a w J 4kiw c) a FM 88 ,92 94 9,,, I ,II 96 I 100 II 98 ' .. 53 W ..,..a. % - , k t LOW QIfF ( HO,-f37T 1 _+ahEE 1 -^` . _ _ AU i4 REC i - ' - . , Sr w 88 90 92 94 96 {{ 98 100 , i nnnnnnun",,t, ,iI,r,,Iul,1,tf'. AM . 55 m itl W :JI) I ea A CUT $ CUT t -2C+8 1 0,4 *y.,.. - ; ( a _ a S FM ,ea ;wee:, sx, ,' .sv-e S*lPi 88 p . 92 11, , lo WI - ..(..1 61101 15 It 111 3s.)))]}}}

6 A4 3+ . F!.FC S - - - U C1FT !i>tlii _20 OV --?lcs5 -.. OOrV t' ..awn I., tVZi . S..a *V! ..0 i LOW CUT 11 -11D -1D-, -2043 bOu-- BASH -mOh n e N - a , . 1pe11t - T P E9L E- e234Ma v a e A 3,025 possible tonal compensations with unique twin stepped tone controls (SX-1010, SX-939) Selector that permits FM recording while listening to records and vice versa. Up to three pairs of soeakers may be connected to each model. INPUTS Tape monitor/4- h. adaptor Phono Microphone Auxiliary Noise reduction OUTPUTS SX-1010- 3X-939 SX838 3 2 2 2 2 Speakers 3 Tape adaptor 3 2 2 Headsets 2 Noise reduction = 1 4 -channel MPX 1 1= 1 1 1 rT 7 . SX-535 Master controlsystem capability Pioneer's engineers have surpassed= themselves with a combination of control features never before found in a single receiver.

7 All three units include: pushbutton function selection with illuminated readouts on the ultra wide tuning dial, FM and audio muting, loudness contour, hi/low filters, dual tuning meters and a dial dimmer. Never before used or a receiver a4e the twin stepped bass and treble -tone controls found on the SX-1010 and SX-939. They offer over 3,000 tonal variations. A tone defeat switch provides flat response instantly throughout the audio spectrum. The SX-838 features = Ar;1 } 4 96 MO 11 1141 1M . : MNs .. ul'llinuul. i`nliren anliltll t0 g0.' , 11 .. - ben .i10Kt/1 FM ,. u - - i: ' . o - .v -. - : , .,..Y.. SX-636 ..: .J ,..:,,,!-k-".'._ ,- _ _ . ,I -'.,-_..-&-_,G. _ :'o . , o -^l.. '_.. ' MONO_ t_Q11 _ AM FM (OFOrA-1 t^ MIC . AUX. n A f 1' ^ OUPLK:AT( A116P10F1 1 AG.))

8 , NQ .. ON ON ON' ON switclhed turnover bass and treble =_ controls for more precise tonal compensation for room acoustics and other program source characteristics. In their respective prise ranges, these are unquestionably the finest values receivers -= has ever known. Audition their uniqueness at your Pioneer dealer. SX-1010 - $ ; SX-92 9 - $ ,== SX-838 - Prices include walnut cabinets. Also new and more moderately priced. Pioneer's most complete and finest , - line of receivers ever, presents equally outstanding values starting at $239,95. Shown here are the SX-535 - $ , SX-636 - $ , SX-73T - $ AU with walnut cabinets. Pioneer Electronics Corp., 75 Oxford Driive, Moonachie, Mew Jersey 07074 West: 13300 S. Estrella, Los Angeles 90248/Midwest: 1500 Greenleaf, Elk Grove Village, Ill.

9 60007/Canada: Parker Co, lf[T 11.(>1T VOLUME MAX, . SX-737 when you want something better -; /'.%^. GUBI Uf ..) ..-T-: :.._ . a t, , n.. _. ; 1 I CIRCLE NO. 36 ON READER SERVICE GAW5 - 7 - an extra $2000 per year Find out how you can earn an extra $2000 or more per year re- storing only a few color and black and white tubes per week. Full color brochure shows you how to make more money and sat- .S a1 isfy more customers on al- / 1; / - most every call. Write to- -' l day! ` -., IF New fr __-` lir_, ffor_ /251)*Z;-- 467 CRT Restorer/Analyzer $279* / O - .n J 474 ( - With the profit restorer: Profit in the home. After replacing a component you've often noticed a less than perfect picture. It's almost always due to a weak picture tube.]

10 The few minutes you spend with the 467 Restorer will give your customer brilliance and sharpness that will make her pleased to pay for the improved picture. Profit in the shop. "Sixty-five dollars and the picture still doesn't look as good as it used to!" How many times have your customers said that to you? You need not hear it again! Use the 467 Restorer on every major job and your customer will thank you for returning his set working like new. Most -Powerful Rejuvenation, but most gentle too. There's only one CRT Restorer that restores the pic- ture to like new and analyzes tube condition so ac- curately that you can safely guarantee restoration for up to five years. You get extra safety from our auto- matic restoration method that prevents cathode stripping.