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'`?}}}}}

2 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 .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.}

3 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. - 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.

4 102 104 106 108 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. - - 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.)

5 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 .. 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.)}

6 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.)))]}}

7 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.

8 SX-535 Master controlsystem capability Pioneer's engineers have surpassed= themselves with a combination of control features never before found in a single receiver. 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.

9 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,. , 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.))

10 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. 60007/Canada: Parker Co, lf[T 11.]