MAY 1971 A HARCOURT BRACE JOVANOVICH PUBLICATION ELECTRONIC · 2019. 7. 17. · Snd. Pic. PRICE...
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MAY 1971 A HARCOURT BRACE JOVANOVICH PUBLICATION ELECTRONIC TECHNICIAN/DEALER WORLD'S LARGEST TV -RADIO SERVICE & SALES CIRCULATION Also featured: The Microwave Oven A New Field in Servicing Color Television Reception Mastering the TV Antenna System Market- - A111..'
Transcript of MAY 1971 A HARCOURT BRACE JOVANOVICH PUBLICATION ELECTRONIC · 2019. 7. 17. · Snd. Pic. PRICE...
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MAY 1971 A HARCOURT BRACE JOVANOVICH PUBLICATION
ELECTRONICTECHNICIAN/DEALERWORLD'S LARGEST TV -RADIO SERVICE & SALES CIRCULATION
Also featured:
The Microwave OvenA New Field in Servicing
Color TelevisionReception
Mastering theTV AntennaSystem Market-
-A111..'
-
WHY REPAIR TV TUNERS?
CASTLE REPLACEMENTSstart at , ,Select by part number below. Write, phone or wire order.
No mailing ... no waiting ... no nonsense!
J
95
UNIVERSAL REPLACEMENTSPrefer to do it yourself?
STOCKNo. HEATERS
SHAFTMin. Max.
I.F. OUTPUTSnd. Pic. PRICE
CR6P Parallel 6.3v 134" 3" 41.25 45.75 8.95Ths Castle replacement tuner, ore all equipped with memory fintuning and UHF position with plug input for UHF tuner. They comecomplete with hardware and component kit to adapt for use in thou-sands of popular TV receivers.
CR1S Series 600mA 134" 3" 41.25 45.75 9.50CR9S Series 450mA 13/4" 3" 41.25 45.75 9.50CR6XL Parallel 6.3v 21/2" 12" 41.25 45.75 10.45
'Supplied with moo. length selector shaft (measured from tuner frontapron to tip) ... you cut to suit.
CR1XL Series 600mA 21/2" 12" 41.25 45.75 11.00
CR9XL Series 450mA 21/2" 12" 41.25 45.75 11.00
tEXACT REPLACEMENTS Purchase outright ... no exchange needed. $1 5.95 ea.
Castle replacements made to fit exactly in place of original tuner. Available in the following popular numbers.
ADMIRAL
94E210 -I94E210-394E227-294E228-194E229-494E229-894 D257 - 194 D257 - 7940237-4994E260 -8H940260 -1194E261-1894E261 -IC94E261 -1D940261-4940277-2940273-4940273-7940273-894 0273-994C27 3-10940273-1394C27 3- IS940281-1K94C286 1 D940286-1094C286 1394C286 -IL940286-4394C286 -94C286. 1294C286 - 1664C281-1
CURTIS
MATHES
All417
A 38A48A050
7 A53-0017A056-001
459-001
EMERSON 340042-1 LOPTT399Y340052-1 LOPTT399YA
471351 34 0053-1 OPTT399YA471512 340066-1 OPTT402471515 340067-1 LOPT T402471678 340069-1 CPTT403471682 340078-1 OPTT4 04471700 340078-2 OPTT4044
140053-2 CPTT405OPTT414A
GE 340130-1
OPT T123COPTT1Z 3DTT1334TT133YALIT3074RTT122ACPT 7332ACPTT33811DC PT T33813CMTT340ACW0734015TT 3488MIT34134V IT34813VT134913CPIT3508CPTT356 TATT 361YOPTT361YBCPI3366Y
110-17 CPTT366YD110-24 OPTT366YD110-25 NCPTT376YA110-33 CPTT378YA110- 38 NCPTT378YA
OPTT 385YOPTT385YA
MAGNAVOX OP TT 386 TAOPTT388YA
340009.1 CPTT390YA34 0010-1 OPTT 390Y B34 0017.1 OPTT394340038-1 SCPTT394340040-1 AOPTT399
0186 X188ET86X208 MOTOROLAET86X212ET86X213ET86X214ET86X215ET86X221ET86X224ET86X227ET86X230ET86X2 31ET86X2 320786X236ET86X242ET86X244ET86 X253ET86X256ET86X263ET86X277ET86X281
HEATHKIT
MUNTZ
PRO352- 1PR 4364PRO376PR 9021PR 9044PR904 5PR 9050PR 9058
OLYMPIC
CL4692- 1CLAZZO- 1CL28874- 101.29554CL29 5660129650C1.33579CL33858C L34190CL34835K24013USA-1C050013USAH- 3
PHILCO
76-12405-476-13579-576-13579-776-13579-876-13579-976-1 3851 276-13871-176-13945-1
74-13955-176-13955-276-13955.5
RCA
KRK1034K RK10 ICKRK103FK RK103LKRK1044KRK104C080104FKRK104LKRK107AKRK107BKRK107CK80107130KRK107EKRK107FKRK108AKRK108BKRK108CKRK106135KRK108 EKRK108FKRK11313KRK 11613KRK118AKRK118CKRK11813
KRK123DKRK124A4KRK124UKR/C127AAKRK127ABKRK12711KRK 127BAKRK 127EK RKI 271.KRK127TKRK127UKRK127WKRK128413
K 01200
470V030H01 175.424 175-721 175-1113 MISC. INCLUDING0001 3313CKRKI3/D
47 OV049H01470V14 9H01
175-426175-431
175-722175-731
175-1134175-1135
PRIVATE LABELS
KRK1 331.1 47 OV151}101 175-454 175-732 175-1136 TAti2470V 158D03 175-601 175-733 175-1137 TA124470V161303 175-602 175.734 175.1138 TA129
SEARS 470V 188D01 175-604 175-735 175-1139 TA131470V 1881302 175-621 175-736 175-1140 TA113
95.75 470V 190301 175-622 175-737 175-1141 TA13695-141-0D 470V191001 175-640 175-738 175-1142 TA1 3895-358-0 470V191D02 175-641 175-7 39 175-1141 TA14795-437-0A 470V 191D03 175-642 175-740 175.1144 TA15095-480-3B 175-643 175-741 175-1145 TA15795-480-3D 175-644 175-742 175-1146 2561241-0021395-481-3A ZENITH 175-645 175-743 175-114795-500-0A 175-646 175-744 175-1148 25A1241-0051395.500-1A 175-167 175-647 175-745 175-1150 25A1241-006895- 500- 18 175-168 175-660 17 5-746 175-1151 25A1245-0050
175-170 175-661 175-747 175-1152 253.124 5-00613175-201 175-662 175-748 175-1153 25/11245-009
SYLVANIA 175-202 175-663 175-750 175-1154 2541245-011175-202A 175-666 175-751 175-1155 25/91246-001
54 11644 3 175-2034 175-667 175-752 175-1156 2541246.00354-11702-1 175-204 175-668 175-753 175-1157 25A1246-00454-17214-1 175-2044 175-669 175-754 175-1160 2541246-005A54 -17436 -2 175-206 175-671 175-755 175-1161 25A1247-00254-17436-3 175-212 175-680 175-756 175-1162 25A1249 -001A54-17436-4 175-213 175-681 175-757 175-1163 2541249.001E54-17436-5 175-214 175-682 175-758 175-1164 25,51251-00154-17778-1 175.216 175-683 175-759 175-1165 25A1233-0011354.23853-3 175-220 175-684 175-760 175-1166 25A125 3-001D54-23857-2 175.222 175-685 175-761 175-1167 2541256-00 IC54-78093-1 175.228 175-686 175-762 175-1168 25.91258-001A54 - 88847 - 38 175-230 175-687 175-763 175-1169 2 SA 258-001C54-89093-1 175-232 175-688 175-764 175-1170 2541263-00154 -89720 -IA 175-254 175-689 175-1101 175-1172 2541264-001B54-89720-3 175-256 175-690 175-1102 175-1175 25A1265- 001B54-89840-2A 175-262 175 -1103 175-1176 25A1268-00154.94689-3 175-264 175-708 175-1104 175-1177 2541270-00154-97948-6 175-266 175-1105 175-1178 006-01470054-97948-7 175-2611 175-711 175-1106 175-1179 006-015000
175-272 175-712 175-1108 006-015700175-402 175-713 175-1118 006-016500
WESTING- 175-403 175-715 175-1119 006-017300HOUSE 175-400 175-716 175-1120 006.017700
175-412 175-717 175-1121 006-018600470V007H03 175-416 175-718 175-1122 006-020100470V019HOS 175-410 175,19 175-1131 006-020900470voi 96101 4, 175-720 175-1132 006-021000
' Supplied with new channel indicator skirt knob, original illuminated dial is not used.
tOVERHAUL SERVICE - All makes and models.
VHF or UHF tunerTRANSISTOR tunerCOLOR tuner
(1960 or later) $9.95$9.95$9.95
Overhaul includes parts, except tubes and transistors.Dismantle tandem UHF and VHF tuners and send in defec-tive unit only.Remove all accessories...or dismantling charge may apply.Your tuner will be expertly overhauled , aligned to originalstandards and warranted for 90 days.
® CUSTOM EXCHANGE REPLACEMENTSWhen our inspection reveals that original tuner is unfitfor overhaul, we offer an exact replacementIf exact replacement is not available in our stock wecustom rebuild the original at the exchange price.(Replacements are new or rebuilt.)
® PROFESSIONAL "CONTACT OVERHAUL" KITDo your own minor tuner over-hauling by using this professionalkit of chemicals. Dealer Net $5.50
CASTLE TV TUNER SERVICE, INC.MAIN PLANT: 5713 N. Western Ave., Chicago, III. 60645 Ph. 312-561-6354
EAST: 130-03 89th Rd., Richmond Hill, N.Y. 11418 Ph. 212-846-5300... for more details circle 105 on Reader Service Card
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ELECTRONICTECHNICIAN/DEALER
jr_F=a rffCOMPLETE MANUFACTURER S' CIRCUIT DIAGRAMSAND TECHNICAL INFORMATION FOR 5 NEW SETS
SCHEMATIC NO. SCHEMATIC NO.
DUMONT 1356 PHILCO-FORD 1358Color TV Chassis 4K16 Color TV Chassis 20QT74
GENERAL ELECTRIC 1357 ZENITH 1355Color TV Chassis N-2 TV Chassis 14838Z, 14839Z
MAGNAVOX 1359TV Chassis T946 Series
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SYMBOL DESCRIPTION ZENITH PART NO.
C26A -4 yf electrolytic. 350v 22-2744C26B-101.(f electrolytic, 400v _22-2744C26C-20pf electrolytic, 25v 222744C58A-200uf electrolytic, 25v 22-5268C58B- 150 u f electrolytic, 350v 22-5268C58C-100uf electrolytic, 350v 22-5268R7 -voltage dependent resistor 63-5314R10 -15K contrast control 63.6491R11 -1M vol limit (141339Z) 63.7569R13 -250K bright control 63.6489R15-7500 buzz control 63-6489R17 -1M vol control & switch 63.6349R19 -1M, AGC 63.4833R23 -750K vert hold control 63.7185R24 -7M vert size control 63-6433R25-varistor 63.7447R26-6000 vert lin control 63-648874 -sound takeoff coil assembly S-7444675-intercarrier coil assembly S-7444576 -quad coil assembly wiring S-7540977 -audio output ',former 95.2675713-vert output )(former 95-2333T9 -yoke 95.2899710-horiz sweep )(former S-8702571I -filament autotransformer 95.2560L9 -line choke 95.2884L10 -quad coil winding assembly S-74682L11 -filter choke 95-1805L12-horiz oscillator S-56877L14 -width coil S-87006AI -integrator 87-4A2 -integrator 87.5F1 -fuse. 1.8a (Pigtail) 136-65
24
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COPYRIGHT 1971 BY ELECTRONIC TECHNICIAN/DEALER 1 EAST FIRST STREET. DULUTH. MINNESOTA 55802
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MAY 1971
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SCHEMATIC NOTES.
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WI LACES MEASURED 017N /701/ 4/WHITS ;cart.ALL C00170.5101071101 RISI7100.
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MIT *WM 01 COOPS 0101117 0510111.CrAsSIS rum
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ELECTRONIC L7 rirVEMpfTECHNIC /DEALER /COMPLETE MANUFACTURERS' CIRCUIT DIAGRAMSAND TECHNICAL INFORMATION FOR 5 NEW SETS
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SYMBOL DESCRIPTION DUMONT PART NO.
R258 --1M, volume control 970430R301 -10K, adj sound reject control 754101.8R315-7500, sound reject control 754101.3R401 -60K, AGC control 75A1019R468 -300K, vent lin control 970435R474-1200, thermistor 61450-3R475-67MA, 20v, VDR 61A511R504 -1M, color killer control 970436R523 -700K, blue background control 75A95-9R615-1500, top blue horizontal control 75A64.7R701-5000, color control 75A127-6R703 -100K, vert hold control 75A134.68704-3.4M, vert size control 75496.20R707 -1,100n, tint control 75A127-7R708 -250K, bright control 75A134.5R709 -250n. contrast control 75A134.4
R7I0-3.4M, master bright control 970449R712 -1M, master screen control 754136.1R714-3,9000, special 'him, 10% 970450R724-VDR 61A46-13R725 -2.8M, high voltage adjustment 970452R728-100, vert centering control 76464.17R7314 -200M focus rectifier module 970454R73113 -40M focus rectifier module 970454R732 -15M, focus control 970455R745-3.80, thermistor 61A27-1C7054-200 of, 350v electrolytic 970475C7058-120 0 f, 350v electrolytic 970475C706C-80 of, 350v electrolytic 970475C7064-10 krf, 350v electrolytic 970476C7068-20of, 200v electrolytic 970476C706C-20 of, 200v electrolytic 970476C7060-501,7 501 electrolytic 970476
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deflection yoke 944377.6
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ELECTRONIC 2/175=',ZaMAY 1971COMPLETE MANUFACTURERS' CIRCUITAND TECHNICAL INFORMATION FOR 5
SYMBOL DESCRIPTION GENERAL ELECTRIC PART NO.
NEW SETS
C402C-5061. +100%-10%, 175v electrolytic EP3IX23C4020-10061, +100%-10%, 250v electrolytic EP3 1 X23C403A-200 j./ 1, +100%-10%, 350v electrolytic EP31X22
C219-24061, ±10%, 5kv, N2200 EP22X25 C4038-15061, +100%-10%. 175v electrolytic EP31X22C402A-20061. +100%10%, 350v electrolytic EP3IX23 C403C-30 pf, +10096.10%, 350e electrolytic EP31X22C40213-1000, +100%10%. 175v electrolytic EP3I X23 L152 -coil, IF xformer EP36X42
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C136-390 _L
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VOLTAGE MEASUREMENTS ARE 20.000 OHMPEP VOLT METER READINGS TAKEN WITH RESPECT
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VOLTAGE VARIES WITH CONTROL SETTING
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fuse, 4a slow -blow EP1OX7fuse, 0.6a slow -blow EP1OX5fuse, 3a fast -blow EPI0X4yoke, deflection EP76X3
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COPYRIGHT 1971 8Y ELECTRONIC TECHNIC1AN/DEALER 1 EAST FIRST STREET. DULUTH. MINNESOTA 53802
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NG ORoyERAOC RICO
NOR PHASE DOT C210
R53122KIN
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R555f 215176.86 6000
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1.6 XXIIC
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I70 ±-470R537
R539
BLU SCR
R543ORN SCRIN
R542IM
RED SCR
T.P
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1041+285V
PRODUCT SAFETY NOTICEProduct safety should be considered when a component replace-ment is made in any area of a receiver. The shaded area of this sche-matic diagram and the parts list designate components in whichsafety can be of special significance. It is particularly recommendedthat General Electric cataloged parts be used for component replace-ment in the shaded areas of this schematic.
Use of substitute replacement parts which do not have the samesafety characteristics as recommended in factory service informationmay shock, fire or other hazards.
IL 67 VE HIT E
RED
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114-250VC21701
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0 Ti NOM. 125RATE
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GENERAL ELECTRICColor TV Chassis N-2
0 , VERT. RATE GVPP94
t
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1 Jvi,P 0 , VERT. RATE
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,NAiti1.U4 10HAIL.51GtiAi
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NOM. /SOPRATF
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COPYRIGHT 1971 BY ELECTRONIC TECHNICIAN/DEALER 1 EAST FIRST STREET. DULUTH. MINNESOTA 55802
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OSCILLOSCOPE WAVEFORM PATTERNS
These waveforms were taken with the receiver AGC control adjusted for an approximate peak -to -peak output of two voltsat the video detector, using an air signal. Do not reset AGC control when using color bar generator. All monochrome voltagestaken with average air signal and all chroma voltages taken with a color bar generator connected to the antenna input ter-minals. The chroma peak -to -peak voltages were taken with the chroma control set for 0.3V peak -to -peak at center tap of chromecontrol or M110 and the tint control set for proper color bars (approximately mid -range), all other controls set for normal view-ing. The frequencies shown are those of the waveforms not the sweep rate of the oscilloscope. All voltages taken with awide band scope having a 5MHz bandwidth similar to B&K Model 1450. Line voltage 120V.
Ink
;Ire
0 2 VOLTS P'P,60 HZ (MAXCONTRAST)M17
0 40 VOLTS P/P,15,750 HZM10
0 110 VOLTS P/P,60 HZPiN 2,6,7 V41
03 45 VOLTS P/P.45,750 HZPIN 1 V42
@ 0.1 VOLTS P/P,± .05 15,750 HZQ96 BASE
17 VOLTS P'P,(C HROMA)70V. P/P, (SYNC)M125
O 2 VOLTS P/P,15,750 HZ(MAX.C ONTRASTIM17
13 VOLTS P/P,15,750 HZM11
0 10 VOLTS P/P,60 HZPIN 9 V41
0 150 VOLTS P/P,15,760 112PIN 2 V42
5.5 VOLTS P/P,15,750 HZM103
@ 50 VOLTS P/P(CHROMA)70V. P/P, (SYNC)M113
0 4.2 VOLTS P/P.15,750 HZ093 COLL.
6.6O VOLTS P/P,15.750 HZBASE OF Q41
O 1KV VOLTS P/P,60 HZ (SPIKE)200 VOLTS P/P,60 HZ (SAWTOOTH)M46. OR PIN 4 V41
(21) 200 VOLTS P/P,15,150 HZPIN 6 V42
3 VOLTS P/P,15,750 HZ0102 BASER150. R151
@ 2 VOLTS P'P,ICHROMAI25V. P/P, (SYNC)R160, R173PiN 7 V91
LINE VOLTAGE - 120 VACAIR SIGNAL - FOR MONOCHROME SIGNALSCOLOR BAR GEN. - B&K 1245 - FOR COLOR SIGNALSACTIVE FILTER AT 20 VDC
0 3.8 VOLTS P/P,15.750 HZPIN 2 V92
0 50 VOLTS P/P.15,750 HZM49
0 12 VOLTS P/P,15,750 HZD41. D42
a 200 VOLTS P/P,16,7130 HZM61
0.-.417 VOLTS P' P.15,750 HZ0100 COLL.
3® 0.7 VOLTS P P,15,750 HZ095 EMIT.
80v. P/P, (cont.at point of startof sync corn -press ion) 15,750HZ Pin 7 V92
0 50 VOLTS P'P.60 HZM49
0 16 VOLTS P/P,15.750 HZD41 TOP END
15.750 HZ LOOSE1....LluP LE LiV200 PLATE
8.5 VOLTS P/P,15,750 HZ0101 COLL.
EXPLODEDVIEW OFBURST OFVIEW 34
65V, P/P, (MIN.CON.) 15,750 HZPIN 7 V92
@ 85 VOLTS P/P ,60 HZPIN 10 V41
CI 8 VOLTS P/P,15,750 HZPIN 9 V42
e 4.0 VOLTS P/P,3.50 MHZCR91, D98,R124
45 VOLTS P/P,ICHROMA)70V PIP, (SYNC)15,750 HZM126
ICI 70 VOLTS P/P,15,750 HZ095 C OLL.
12 VOLTS P/P.15,750 HZPIN 5 L95
6 VOLTS P/P.3.58 MHZ093.094
16 VOLTS P/P.3.58 MHZPIN 7 IC91
1.0 VOLTS P/P.3.58 MHZPIN 4 L97 ORM108
(4).55 VOLTS P/P.50 HZ097 COLL.
r
4 44 106 90 VOLTS P P15,750 HZ. C ONT
SET JUST BELOWPOINT OF SYNCCOMPRESSIONM123
e 660 VOLTS P/P,15.750 HZM48A
12 VOLTS P.15,750 HZPIN 4 L95
0.8 VOLTS P/P3.58 MHZPIN 3 IC91
1.6 VOLTS P/P,3.58 MHZM107
0 1.0 VOLTS P/P,3.58 MHZL98 -R139
42A 0 85 VOLTS P/P,60117M102
30 VOLTS P/P,15,750 HZ05 COLL.
420 VOLTS P/P15,750 HZM48
B & K METER 175A.G.C. FULL CLOCKWISEACTIVE FILTER +20 VDC @ M13LINE VOLTAGE 120 VAC
PHI LCO-FORDColor TV Chassis20QT74
TRANSISTOR VOLTAGES NO SIGNAL
TRANSISTOR FUNCTION E B C
Q1 1ST V.I.F. 1.7 2.6 14.6Q2 2ND V.I.F. 2.7 3.3 12.8Q3 3RD V.I.F. 3.1 3.75 14.5Q4 GATED AGC 17 16.75 21Q5 RF AGC 8 13.2 1.2Q6 1ST VIDEO 1.5 1.2 12.6041 SYNC SEP 0 -1.3 42Q91 2ND S.I.F. 11 11.6 14Q92 1ST S.I.F. 6 6.8 10.4Q93 DELAY DRIVER 3.6 4.2 14.6Q94 AUD PRE AMP 0 .58 2.4Q95 BURST AMP 4.8 0 39
096 1ST CHROMA .2 .92 17.5Q97 COLOR KILLER 0 -.1 20
Q98 AUD DRIVER 1.8 2.4 20Q99 BUFF AMP .86 1.5 17.5
Q100 X DEMOD 1.6 1.40 12.6
Q101 Z DEMOD 1.4 1.44 12.60102 2ND CHROMA .52 0 20Q103 BLANKER .52 -1.34 6.6Q201 AUD. OUTPUT .64 1.18 108Q200 ACTIVE FILTER 19.7 20.5 28
) 12 VOLTS P'P,16,760 HZ0 03 BASE
r1014
03.5 VOLTS P P,17,600 HZ0103 EMIT.
TRANS. FUNCTION !TOON:, IT0011). c ro OW. CTO 1
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I- .1ITO'I .1
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2300115001
150006001
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6.525
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; 7,115.
11.14)04 GATED AOC .00 1175 362 350
1210
31211.421
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1146001 I AOC 360 ICAO 1630 1175
ti:{311
1.74621(I:
1460114501
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';33'DELAY 6 ONIVIN 301 1471 1030.3501
320 4
142512.310
060 6010. PIN ATV 100 1726 2600 32 50ot 155014281
dK SWOT All 101 4.64136 12)(55120
i1:81
11496°2)
1.k
71620
016 IR GOMA 69 1.96 1060)11031
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61011 .61 2.91 3.21 1350 .1.; .,1211(8)ON AUD °MVO 62 2.66 760OM L 1 .111.1
'IleON SUFF ARP 75 1176 450 550 1.40":5°1 "512,110106 I 011201) 470 1.24 1450 Tr
(4520'"45166"153*;ITmu (1.34) (19601
175018.281
2000161 100 490 1.22 3.62
2140 CHROISA 1112 211 1350 IWO 506
",7,2,510103 NAME 12 000 2750 It)2
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.402
1.13:1,111
IX11'1V0160 ACTIVE 611.111 245 1360 3.40
(14501 110101 13.42)
121000021000
TRANSISTOR 6E515 ANCES
COPYRIGHT 1971 BY ELECTRONIC TECHNICIAN/DEALER 1 EAST FIRST STREET. DULUTH. MINNESOTA 55802
-
1359MAGNAVOX;
TV ChassisT946 Series
40V PP
14 120V P/P
ANT
TO OA
NM.
ALI DI>700
V 15.
vAI TuNtR
50V P/P
ELECTRONICTECHNICIAN/DEALER =GgMAY 1971COMPLETE MANUFACTURERS' CIRCUIT DIAGRAMSAND TECHNICAL INFORMATION FOR 5 NEW SETS
TO NT
IAN TLRI1A rw-4,
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10.00
0 0
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113,00 NtAR OF0 'IONA
TO 40v
H 11. 70V P/P
4. 100V P/P
13V P/P V
N 12.
16. 1100V P/P 13.
100V P/P
100V P/P
H
H
ELECTRONIC TECHNICIAN/DEALER is pub-lished monthly by HARCOURT BRACE JO-VANOVICH PUBLICATIONS, INC-. 1 East FirstSt., Duluth, Minn. 55802. Subscription rates:One year $6, two years $10, three years $13,in the United States and Canada. Other coun-tries: One year $15, two years $24, threeyears $30. Single copies 750 in the UnitedStates, and $2 in other countries. Secondclass postage paid at Dansville, New Yorkand at additional mailing offices. Copyright1971 by HARCOURT BRACE JOVANOVICHPUBLICATIONS, INC.POSTMASTER: Send Form 3579 to ELEC-TRONIC TECHNICIAN/DEALER, HARCOURTBRACE JOVANOVICH PUBLICATIONS, INC.,1 East First St., Duluth, Minn. 55802.
SYMBOL DESCRIPTION MAGNAVOX PART NO.
LI-sound take -off coil 3613441L2 -sound interstage xformer 361369.1L3-quadrature coil 360847-2L6-4I.25MHz trap coil 361381-1L16-4.5MHz trap coil 360851-1L21 -filter choke 320367-171 -audio output xformer 3203681T2-vert output xformer 320369-1T3-horiz output xformer 361373-1
deflection yoke 361377-1Cl-silver mica, 200pf, 20%, 500v 250366-537C77-2000 f. 200v, 400/40yf, 175v electrolytic .270099-12R62-thermistor 230130-2R92-4.7, 10%, fusible 240098-1R9 -volume, w/switch, 1M (used in T946-01,04,05) 220247-7008
FRONT
CRIMEGVSgRs LI
3,04r.J
INPUT'
25 NEG. L2CR2
REAR
LILT
R9 -volume, w/switch, 1M (used in T946-02,03.06) . 220260-16R31 -contrast, 6000 (used in T946-06( 220255-11R31 -contrast, 600n (used in T946-02.03) 2202558R31 -contrast. 6000 (used in T946-01,04.051 220251-1R38 -bright, 200K (used in 7946-06) 220255-10R38 -bright. 200K (used in T946-01.04.05) 220251-2R38 -bright, 200K (used in T946-02,03) . 220255-7R60 vert linearity, 3.5M 220251-5R68 -height 2M ........ . . . . . . . . 220251-3R73-vert hold, 1M (used in T946-01,02.03,04.05) 220251-3R73 vert hold, 1M (used in T946-06( 220255-9R86 volume limiter, 2M(used in T946-04) 220258-1R87 width, 50 220167-28VDRI-varistor 230167-2PC1-packaged circuit 250377-1
VHF tuner (non -remote units) 340168-1UHF tuner (remote unit) 340189-1circuit breaker 1807237003
.1111
IF :NUT I STVIDEO IF41 20
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2NDVIDEO IF
03100NI
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CH -IINPUT
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L14
AUDIOOUTPUT
VIN!TOFU
RIZ
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C77
LI3
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42200
R3640
CH -I3
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270
RFC
FR2
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C16
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120
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1121200
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30*
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0614411
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EARPTICIAN JACK101114 WWI
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4- v:SOOLIN.
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301016
VERT. OSC1:11:2
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VII21021
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4104
4,00
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Nuou
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6,074.
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VS22JU6
DAMPERV6
17CT3
13
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NOV
4
1.1=Ao*i
RECTIFIERPI VVTIKEA Vet
4.1
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ROO MKTNI 110.0101 NANA CUR
RUT
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LOT, -1 105/.
1.V TRAUMA... 9-0CCTI 70 tow
N lap, Ll
COPYRIGHT 1971 BY ELECTRONIC TECHNICIAN/DEALER 1 EAST FIRST STREET. DULUTH. MINNESOTA 55802
C2011(-;F.
OUTPUT
NOT.LOIL1111 OTINRINN ...IMO
ALL CAPACITORS AN SOOT1 ALL CAPACITORS AIN tOA3
ALLC. CTN.. AAPACITORSRTAH VALUES OFLNC IN Nu
ALL C3E44,0419 qv. v$,,,FT143 1 AN PP
IALL tlICTSIOLTTICS Rt IN INDAu UNSTOPS AM 1/10. 1046 OF 1/F001
1 SI ON INAR OF VOLUME CONTROL.TOLTAINS 1NANANO RITN STVIII FROMPONT 14101381 TO MOUND 111111.1410111171
ITN NO SINIAL INPUT. vOlUaltCONTROL AT UNINUIL NORMALCOINO
SRI INT TINOS. AND MOTAC POU
L10R10 CIRC ILINURS RIFER TO IFAVUORNS00TAIND NUN AN ON -TIN -AN 1111114ALITC. PATTERN, CONTRAST CONTROLUT TO PROW. NOV SNNAL ATMU INKT CAT110133
Twa INACTION INNOTt 0I10ON1aNO 14 NANO Raise. veRSIONSAA 304[ VUNINNS.7111 PLOT LAMP ARO oeRESISTOR ARE NOT PART Of AN 1311104.7
DOT -
0a OS 01114
EliOAR
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01.01.03
04417
NOM TRAM ONt lAw NATUILT.
-
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PROVIDES YOU WITH ACOMPLETE SERVICE FORALL YOUR TELEVISIONTUNER REQUIREMENTSAT ONE PRICE.
TUNER REPAIR -4110
VHF Or UHF Any Type $9.75.UHF/VHF Combo $15.00.
In this price all parts are included.Tubes, transistors, diodes, and nLvistorsare charged at cost.
Fast efficient service at our fou' con-veniently located service centers.
1 year guarantee backed up by thelargest tuner manufacturer in the U.S.SARKES TARZIAN, INC.
All tuners are cleaned inside and out,repaired, realigned and air tested.
TUNER SERVICE CORPORATIONFACTORY -SUPERVISED TUNER SERVICE
-
TUNER REPLACEMENT
Replacement Tuner $9.75.
This price buys you a complete newtuner built specifically by SARKES TAR-ZIAN INC. for :his purpose.
The price is the same for every typeof universal replacement tuner.
Specify heater typeParallel 6.3VSeries 450 mASeries 600 mA
All shafts have the same length of 12".Characteristics are:
Memory Fine TuningUHF Plug InUniversal MountingHi -Gain Lo -Noise
MIDWESTMIDWESTEAST
SOUTH-EAST.WEST
If you p'efer we'll customize thistuner for you. The price will be $18.25.Send in original tuner for comparison pur-poses to our office in INDIANAPOLIS,INDIANA.
817 N. PENNSYLVANIA ST.. Indianapolis. Indiana,Home Othce
547-49 TONNELE AVE., Jersey City, New Jersey
938 GORDON ST.. S. W.. Atlanta. Georgia
SARKES TARZIAN, Inc. TUNER SERVICE DIVISION10654 MAGNOLIA BLVD.. North Hollywood, California
... for more details circle 135 on Reader Service Card
TEL: 317-632-3493
TEL: 201-792-3730
TEL: 404-758-2232
. . TEL: 213-769-2720
MAY 1971, ELECTRONIC TECHNICIAN/DEALER 19
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HUGH "SCOTTY" WALLACEPublisher43 East Ohio StreetChicago, Ill. 60611(312) 467-0670
TOM GRENEYPublishing DirectorPHILLIP DAHLENEditor1 East First StreetDuluth, Minn. 55802(218) 727-8511
JOSEPH ZAUHARManaging EditorCAROLYN SANDAssociate EditorBERNICE GEISERTProduction ManagerBOB ANDRESENGraphic DesignLILLIE PEARSONCirculation FulfillmentJOHN KESSLERManager, Reader Services
MANAGERS
ALFRED A. MENEGUS757 Third AvenueNew York, N.Y. 10017(212) 572-4829
DEAN GREENER43 East Ohio StreetChicago, I11.60611(312) 476-0670
CHUCK CUMMINGSAd Space South/West613 North O'ConnorIrving, Texas 75060(214) 253-8678
DONALD D. HOUSTON1901 West 8th StreetLos Angeles, Calif. 90057(213) 483-8530
CHARLES S. HARRISONCY JOBSON57 Post StreetSan Francisco, Calif. 94104(415) 392-6794
ROBERT UPTONTokyo, JapanI.P.O., Box 5056
ELECTRONICTECHNICIAN/DEALER
MAY 1971 VOLUME 93 NUMBER 5
This month's cover shows RCA's new 4BG69 Permacolor Antenna, one of the largestconsumer color -TV antennas ever made. It is designed to produce exceptionally sharppictures in fringe areas where small antennas are ineffective. The photo was suppliedthrough the courtesy of RCA Parts and Accessories, Deptford, N.J.
3 TEKFAX: Up-to-date schematics for easier servicing.
23 EDITORIAL: A Return to Better Times.
24 LETTERS: Pertinent comments concerning past issues.
26 READERS' AID: What you need or have for sale.
29 PUBLISHER'S MEMO: NEW Show Report from Sunny Bal Harbour, Florida.
30 NEW SHOW: The "what and where" for many of the displays at this very impor-tant exhibit.
FEATURES
39 TEKLAB REPORTInteresting circuits encountered when examining General Electric's N-2 Color -TVChassis.
43 MASTERING THE TV ANTENNA SYSTEM MARKET-PART IIdesired TV -antenna signals and modifying them for use in a distri-
bution system-by Lon Cantor.
46 COLOR TV RECEPTION-PART IIComparing the characteristics of circuits that are used commonly in both color -and B/W -TV sets-by William Spero.
50 THE MICROWAVE OVEN-A NEW FIELD IN SERVICINGSome principles which will be of value to you when expanding your business toinclude another important field of consumer electronics-by Lew Christy.
55 TEST INSTRUMENT REPORTA review of specifications for B & K's new Model 179 solid-state FET-VOM.
56 GUEST AUTHOR: HOW A MANUFACTURER CAN HELP OR HINDER THEDISTRIBUTOR/SERVICE DEALERWilliam Carlson, Director of Federal Pacific Electric's Marketing CommunicationsDept., offers some suggestions concerning how manufacturers can make your jobeasier.
58 COLORFAX: Tips for easier color -TV set repair.
62 TECHNICAL DIGEST: Hints and shortcuts for more effective servicing.
73 BOOK REVIEWS: Our appraisal of recent publications.
76 ADVERTISERS' INDEX: Manufacturers concerned about you.
77 READER SERVICE: A source of additional information.
IN A HARCOURT BRACE JOVANOVICH PUBLICATION yep
ELECTRONIC TECHNICIAN/DEALER is published monthly by Harcourt Brace Jovanovich Publications.Corporate Offices: 757 Third Avenue, New York, New York 10017. Advertising Offices: 43 EastOhio Street, Chicago, Illinois 60611 and 757 Third Avenue, New York, New York 10017. Editorial,Accounting, Ad Production and Circulation Offices: 1 East First Street, Duluth, Minnesota 55802.Subscription rates: One year $6, two years $10, three years $13, in the United States and Canada.Other countries: one year $15, two years $24, three years $30. Single copies: 75C in the U.S.and Canada; all other countries $2. Second class postage paid at Dansville, New York 14437 andat additional mailing offices. Copyright 1971 by Harcourt Brace Jovanovich Publications.
POSTMASTER: Send form 3579 to ELECTRONIC TECHNICIAN/DEALER, P.O. Box 6016, Duluth,Minnesota 55802.
20 ELECTRONIC TECHNICIAN/DEALER, MAY 1971
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Keep electronic components handy withMallobin' Benchtop Organizers. Each Mallobincontains a popular assortment of electroniccomponents in a s:ack3ble, interlocking plasticcase. Fifteen partitioned drawers keep partsneat. And each drav,er is color coded andlabeled for quick IDcat on of the part you want.
MALLORY!
Batteries
Mr OM WV II
Capacitors
Mallobins ccrre with selected components in-cluding all types of fixed capacitors MOL andwire -wound rEsistors. carbon and wire -woundcontrols. In acdition -o regular Mallobins, cus-tom assortments are available.Ask your Mallory dist-ibutor for Mallobin pricesand details today.
MALLORY DISTRIBUTOR PRODUCTS COMPANY/n 4,1 P. IL & CO. INC'.
Box 15158. Indianapolis, Indiana 1(1'00 1', lc pl
Czssette Tapes Controls Resistors
'317(333"-353
Semiconductors Sonalerto Switches Timers. Vitiators
. . . for more details circle 123 on Reader Service Card
MAY 1971, ELECTRONIC TECHNICIAN/DEALER 21
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RCAs PS Warranty Programis at your service.
Just because we were #1 in 1970 color TV sales to consumers doesn't mean we've forgotten you today.We created "PS", a warranty program which backs you up as well as every AccuColor' TV PS meansProfitable Servicing for two reasons: First, because AccuColor owners can RII"
1111111 11select any service agency they want. And, second, because RCA pays your
1,11going rate for warranty service rendered. Sound good? For details, read on. 11111111111,11111
Racrese SansiwmAi. Sae, P.0 t.Fun., Satstactcn PrIcare Saes PJcnr., .PurcneserSItstx1.51 SOK ,thast- St .4RKINISe4 S.VeSVICIGO POIANV Saes R.orx 5.3.6trtonPumase, SatAancr POMO Saes=rn racnul... .Sanstrnm
RCAPURCHASER SATISFACTIONPROGRAM
CTICPffl
RCA's Symbol of AccuColor Parts and Labor Basic Warranty Provisions. For one full year from the date of purchase. RCAGorporation warrants to the first retail purchaser that it will pay all labor charges for repair of defects in 100%
Purchaser solid state AccuColor models (90 days on AccuColor models with "New vista" chassis) and will make avail -Satisfaction. able replacements for any defective parts. (If the picture tube becomes defective within two years, it will beexchanged for a rebuilt picture tube ) On portable models RCA will make available replacements for defective
parts and pay labor charges only on a "carry -in" basis; transportation to and from the service agency is the purchaser's responsibility Installation and set-up,foreign use. antenna systems, and adjustment of customer controls are not included. To obtain warranty benefits, contact your RCA dealer or the serviceagency of your choice with your Warranty Registration Card.
For a copy of the PS booklet which covers all of our products, and the name of your field representative,write RCA Sales Corporation, Dept. 634, 600 N. Sherman Drive, Indianapolis, Indiana 46201.
... for more details circle 127 on Reader Service Card
22 '1 ELECTRONIC TECHNICIAN/DEALER, MAY 1971
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EDITORIAL
A Return to Better TimesDuring the past year we have printed a number of feature articles and Editor's Memosconcerned with the bad economic trends that we were either about to experience orbeginning to feel. Our publication emphasized the fact that when fewer new consumer productsare purchased, there is a greater demand for servicing the old ones-any decrease insales revenue being compensated for by an increase in revenue from repairs.
As you know, there were several factors that contributed to this temporary economic situation.Not only were interest rates rising (up to 81/2 percent for GI and FHA home loans, and evenhigher for many other types of loans), corresponding cutbacks in federal spending werecosting the jobs of many men and women involved in government contract work. Resultingpublic pessimism produced a marked decline in the stock market and renewed interest inthe security and high earnings that could be had in savings accounts-as opposed to the desirefor purchasing that new hi-fi set, color -TV set, etc., as planned.
Although government spending has not again reached its previous extravagant levels, mostmanufacturers that were forced to readjust to fewer government contracts have now completedthe task of tightening their belts and are not laying off any more personnel. Havingreadjusted to this "peace time" market, some companies have found that there really ismore business than anticipated, with some personnel bemg reemployed. Many employees notrehired have now had time to either secure better paying jobs, or at least adequately payingjobs for the time being. Even some of those still unemployed are getting tired of going withoutand are using a small portion of their unemployment checks to purchase that new phonographor TV set.
Today's American consumer is just too accustomed to chat at one time would have beenconsidered luxuries. He may be frightened into "pinching pennies" for six to nine months,but then the strain becomes just too much-he feels that he simply must have that newFM radio, tape recorder or whatever-budgets can be considered some other day.
Good or bad, this is a reality, a new way of life in this country. A phobia for "keeping upwith the Jones'." Maybe it has reached a point of being a sickness that government isunable to cure in a democracy such as ours. Or, maybe it is something entirely different-an example of the complete faith that the people in our country have in both our governmentand the free enterprise system. A healthy byproduct of the dynamic "American Incentive"for turning misfortune into good fortune.
Although we complain of a little more government "red tape" than we were faced with adecade or so ago, we can still be proud of the fact that we experience more economicfreedom than can be had in any other country in the world. Although this extreme freedommight seem risky and even foolhardy to those accustomed to the government control prevalentin foreign countries, time has proven them wrong. Our freedom has permitted greateconomic flexibility. We are free to rapidly self -adjust as economic conditions change-not being hampered by the muddled machinery of some bureaucracy of mutuallyacclaimed experts.
Open those shutters and breathe in that fresh air! Listen as the merry tune of those ringingcash registers grows louder. The recession is ending! Now is the time to get out there and sell!
Within the next few weeks, our electronic industry will be holding its NEW Show in BalHarbour, Fla. In this issue, Scotty Wallace's Publisher's Memo introduces a preview to thatshow-where the industry will be displaying the many new products that will assist youin refilling your cash boxes.
MAY 1971, ELECTRONIC TECHNICIAN/DEALER 23
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LETTERSReader comments concerning pastfeature articles, Editor's Memos, previousreader responses or other subjects ofinterest to the industry.
Who Made That Probe?Judging by the number of inquiries
both you and we are receiving, itmight be useful if we could let yourreaders know clearly that the three -
tip probe that is so useful in trouble-shooting transistor sets, as described inyour November, 1970, issue of ELEC-TRONIC TECHNICIAN/DEALER, is the B& K probe FP -1.
These are available at all B & K dis-tributors.
We hope that your readers will findthese as useful as the author did whenhe unsolicitedly wrote that fine article.
Leaving out the manufacturer'sname removed the element of com-mercialism, but on the other hand itdenied many of your readers an easy
..001111111111101111111m.,
MINI11111111111111111MM111111111111MMEM1111111M11111111111MI111MMEMMIIN
Two new B&K digitals that don'tstand a chance of a ghost.
Ghosts, blurs, wiggles, jitters... whateveryou call them, you won't get them with ourtwo new digital color generators. Youcan converge, install or trouble -shoot colorTV's quickly and accurately. Because thesetwo units employ totally new concepts thattake the trouble out of trouble -shooting.
Integrated circuit flip-flops perform allbinary counting functions. Just no way theycan jump a count. Result: Crisp, clean,stable test patterns.
And all IC's (nine of them) and transistorsare silicon devices, which means they canwithstand severe weather changes with noeffect on performance.
The 1243 is a basic 6 pattern colorgenerator. The deluxe 1246 has ninepatterns, three more than the 1243, and
(Ask your distributoror write us for
complete catalog)
1. B&K Model1246 ColorGenerator$149.95
2. B&K Model1243 ColorGenerator
$99.95
also features a 41/2 MHz sound carrier,crystal controlled RF for channels 3 and4, gun killers, and comes with its owninstant -use case.
All the accuracy and reliability of acomputer in these compact units, andthey're guaranteed to be maintenance free,making your job a lot easier.
So don't get a CBG that may come backto haunt you. Get one of B&K's new digitalgenerators: They don't have a chance ofa ghost.
Products ofTNASCAN CORPORATION
1801 W. Bello PlaineChicago. Illinois 80813
The new standard of stability
way to follow up on its purchase ifthey so desired.
Hopefully, this letter will clear thismatter up.
Keep up the good work!HAROLD J. SCHULMAN
EXECUTIVE VICE-PRESIDENTDYNASCAN CORP.
As Harold indicated, we did receivequite a number of letters-that wereforwarded to B & K-asking whomanufactured the probe described inthe article, "Test Probe Leaves OneHand Free in Three -Handed Job." Ed.
Diversification Pays OffIn response to Joseph Humphries'
letter in the March issue of ELEC-TRONIC TECHNICIAN/ DEALER, I wouldlike to say that in the field of electron-ics there never was a time when anyone person could service everything.Progress has proceeded so rapidly inthis line that there is still no one thatcan cover it alone.
In Mr. Humphries' letter, he doesnot give the radio -TV serviceman atechnical rating. With the radios, stereocomponents and color -TV sets out to-day, I believe his rating is equal to thatof any other technicians-electronicor mechanical.
As for sticking to what you know,anyone that has lived through the de-pression knows that it is good to haveyour hand in more than one trade.You answered the letter well, though Iworked the problem out in a differentmanner. During the summer months,when radio -TV servicing slows down,I sharpen lawnmowers and saws onhomemade machines. I must be doingthe job well since the same customersreturn with more work.
I suppose that when Mr. Humphriesbreaks a shaft off some tool, he sendsit to the manufacturer for repairs. Itake it to my cellar and either weld ittogether or turn out a new piece in mysmall South Bend lathe.
PETER LEGONAlthough some electronic techni-
cians may consider it beneath theirprofessional dignity to branch out intoother fields, in certain market areas itis an economic necessity. Pride willnot pay your bills. What is most im-portant is that you have enough self-respect to do the best job you can-whether it is in repairing defectiveelectronic equipment or sharpeninglawnmowers. Ed.
MOVING?Be sure to let us know your new address.
Please enclose a complete address label
from one of your recent issues.
. . . for more details circle 102 on Reader Service Card
24 ELECTRONIC TECHNICIAN, DEALER, MAY 1971
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SERVIC technicians know that Color TV repair demands moretime and effort. That's why Sprague strives to simplify Color TV capacitor selection.
COLO TV capacitors by Sprague come in the exact rat-ings reqJired to meet the exacting requirements of Color TV.
service becomes more demarding as Color TV keeps ex-panding. That's why exact capacitor ratings are important. Theyhelp you to -estore original set performance.
EASIE selection of replacement ca-pacitors for Color TV is assured when you look to the broadSprague line. You'll get the capacitor you need-when youneed it-every time.
Just off the press! See your Sprague Distributorfor a free copy of our new 44 -page K-110 Twist-Lok'and Print-LoV Capacitor Replacement Manual, orwrite to: Sprague Products Company, 65 Marshall St.,North Adams, Mass. 01247
THE BROAD -LINE PRODUCER OF ELECTRONIC PARTS
SPRAGUE®THE MARK OF RELIABILITY
... for more details circle 132 on Reader Servics Card
MA" 1971, ELECTRONIC TECHNICIAN/DEALER 25
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22 JF;F JR, sz, LAUTOMATI
STAPLE GUNSCUT WIRE & CABLE
INSTALLATION COSTS. . . without cutting into insulation!SAFE! Grooved Guide positions wire forproper staple envelopment! Grooved DrivingBlade stops staple at right depth of penetrationto prevent cutting into wire or cable insulation!
No. T-18-Fits wires up to3/16" in diameter.
BELL,TELEPHONE,
THERMOSTAT,INTERCOM,BURGLAR
ALARMand other lowvoltage wiring.
Uses T-18staples with 3/16" round crown
in 3/8" leg length only.
No. T-25-Fits wires up to1/4" in diameter.Same basic constructionand fastens samewires as No. T-18.
Also used forRADIANT
HEAT WIRE
Uses T-25 stapleswith 1/4" round crown in 9/32", -3/8", 7/16" and 9/16" leg lengths.,''
T-18 and T-25 staples also available in Monel andwith beige, brown and ivory finish at extra cost.
No. T -75 ---Fits wires and cablesup to 1/2" in diameter.
RADIANT HEAT-, CABLE,,,OF CABLE,
WIRE CONDUITCOPPER TUBINGor any non-metallic
sheathed cable.Also used as
DRIVE RINGSin stringing wires.
Uses 1-75 staples with 1/2"flat crown in 9/16", 5/8" and
7/8" leg lengthy
Arrow Automatic Staple Guns save 70% in timeand effort on every type of wire or cable fasten-ing job. Arrow staples are specially designed withdivergent -pointed legs for easier driving androsin -coated for greater holding power! All -steelconstruction and high -carbon hardened steelworking parts are your assurance of maximumlong -life service and trouble -free performance.
Ask your Electrical Supply Dealeror write for further details.
)1222"2=1:11=2:12W.Saddle Brook. New Jersey 07863
"Pioneers and PacesettersFor Almost A Half Century"
READERS' AIDSpace contributed to help serve thepersonal needs of you, our readers.
Needs ManualI have recently come into possession
of an Oscilloscope, Model 300, madeby Precise Development Corp. I needa schematic, operator's manual or anyinformation I can find about it. I willgladly pay for a schematic or copy andreturn material if requested.
WILLIAM PERRYElectronicus3533 S.E. 6th St.Renton, Wash. 98055
Because of the numerous requeststhat have come across our desks, weare asking help in locating a source ofinformation for any or all instrumentsthat were manufactured by PreciseDevelopment Corp. If anyone can sup-ply us with this information we willbe more than happy to pass this infor-mation along to you, the readers. Ed.
I have a Precise Oscilloscope, Mod-el No. 300, Serial No. B-3509. I am inneed of an operating manual and sche-matics for this scope. If anyone hasthis information, please contact me.
RONNIE DAY1326 BroadwayCincinnati, Ohio 45210
I am willing to pay for a manual cov-ering the operation and recalibrationof the Universal Power Bridge, Model650 B, S/N 1077, manufactured bythe Polytechnic Research & Develop-ment Co., which is no longer in busi-ness.
HOWARD ADAMS630 N.E. 50th St.Oklahoma City, Okla. 73105
I am in need of an operator's man-ual for a Dumont 5 -in Oscilloscope,Model 303-A.
ALAN C. JACQUES201 Timber LaneLaGrange Park, Ill. 60525
I have a 3 -in. general-purpose benchscope J am trying to put into service.It was bought from an Army SurplusDepot and bears no manufacturer'sname that I can find. It is a ModelOS -34/ USM-32 and the chassis platereads: NO BSR 52688, 1508 CDU.Can anyone possibly give a hand in
locating a manual or at least a sche-matic for this unit?
THOMAS M. KINGP.O. Box 24Wellington, Ohio 44090
Needs AddressCan someone supply me with the
name and address of a company thatmakes the Phoneking telephone an-swering and recording device?
R. C. DIEHL3723 Woodruff AvenueOakland, Calif. 94602
Needs Old TubesWhere can I buy old vacuum tubes?
The tubes I need are 1232, 6A8G,6K7G and 6V6G.
HENRY T. MULLINSMullins Radio & TV3400 East KearneySpringfield, Mo. 65863
I collect old battery radios as ahobby and need some early type tubesfor them. I am looking for the follow-ing: 01A, 00A, 71A, 199, 120, WD11,WD12. If anyone has any of these,either new or used, please contact me.
I would also like a good case andknobs for a Pilot TV -37 TV set.
ALVIN HECKARDRD 1, Box 88Lewistown, Pa. 17044
For SaleI am quitting the TV business and
wish to dispose of 250 tubes, plus testgear and parts at best offer.
JACK MANDIK1333 Ridge Ave.Evanston, Ill. 60201
Needs Schematic1 need a schematic and any other
information available on a "Candle"portable TV set, Model MT -510. Or Iwould appreciate the address where Ican obtain this information.
WILLIAM B. CLARK7319 Farwest DriveSan Antonio, Texas 78233
Needs ChartCan anyone supply me with an ad-
dress where I can obtain a roll chartfor a Model 1 1 1 GM & EM tube testermanufactured by Precise DevelopmentCorp.?
GENE L. KELLER2255 Colonial Pkwy N.E.Massillon, Ohio 44646
. far more details circle 101 on Reader Service Card
26 ELECTRONIC TECHNICIAN, DEALER, MAY 1971
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I INSTRUMENTS THAT STAY ACCURATE 1IN CANADA: Bach -Simpson Ltd., Londor, OntarioIN INDIA: Ruttonsha-Simpson Private, Ltd., International House,
... for mere details circle 131 on Reader Service Card
MAY 1971, ELECTRONIC TECHNICIAN/DEALER 127
re-40A.
VOLT -OHM - 1,111.1.1AMME1ER, .
se V AD"XitOTC5 0=C no V .A13I AO
500 MA.TRANSIT
10MA.AMPS.
MA.
R.1
R.I00
- R.I0,000 OJTPUT0 0THE NEW SERIES 6 HAS ALL THESE NEWFEATURES PLUS ALL THE ADVANCEMENTSIN THE SERIES 5: External access battery and fuse compartment. Clip -type fuse holder. 0.1 volt DC range. 0.500 volt AC and DC ranges. Available 5000 volt adapter -type DC safety probe. Multi -purpose, screw -on test leads with
combination probe and alligator clips. Only 2 batteries . . . one 9 -volt NEDA 1604
and one 11/2 -volt "D" cell. Rugged taut band movement. Varistor overload protection.
260-6260-6M (Mirror scale).
$65.00$67.00
NOW,the new
260SERIES 6VOM
EXTERNAL BATTERY AND FUSE COMPARTMENT
260-6RT (Roll-top protective case) .260-6MRT (Mirror scale and roll-top260-6P (Overload protected)260-6PRT (Overload protected and
roll-top case)..Safety Probe: 5000 volt DC adapter
type #00506
$71.00case) $73.00
$97.00
$103.00
$4.50
GET "OFF THE SHELF" DELIVERY FROM YOUR LOCAL ELECTRONIC DISTRIBUTOR-OR WRITE TODAY FOR BULLETIN T-810.
cSIMPSON ELECTRIC COMPANY. 5200 W. Kinzie St., Chicago, III. 60644, Phone: (312) 379-1121
Export Dept: 5200 W. Kinzie St., Chicago, III. 60644, Phone: (312) 379-1121, Cable SIMELCODIVISION
Bombay -Agra Road, Vikhroli, Bombay
-
simulated picture
It takes timeto replace a color picture tube...
GE ULTRACOLOR°
works to cut backthe need ofreplacing the
replacement
sustained brightness and co or purity are assured throughuse of advanced getter material. Gases generated by thetube's operation are removed, providing longer life andsustained color purity
reliability and quality assurance are built in. Only thehighest quality replacement components are used andthey're still expected to prove themselves. First duringthe manufacturing process through continuing in -lineinspections, and extensive life testing of the finishedproduct. afterwards.
GE ULTRACOLOR picture tubes provide the serviceand dependability that guarantee customer satisfaction.(Made by professionals, for professionals.)
TUBE PRODUCTS DEPARTMENT. GENERAL ELECTRIC COMPANY
OWENSBORO. KENTUCKY 42301
GENERAL ELECTRIC
28 ELECTRONIC TECHNICIAN/DEALER, MAY 1971
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This photo, representing our trip to sunny Florida, was madefrom a co/or slide taken recently by Dick Pavek of Tech Spray whilewatchiig the planes take off at Chicago's O'Hare Airport
PUBLISHER'S MEMO
Most of our readers are aware of the fact that each springour industry holds its annual manufacturers, distributors andreps convention, known as National Electronics Week(NEW,. This show gives manufacturers the opportunity tointroduce their latest equipment and parts to those in at-tendance-who upon return will be passing this vital infor-mation along to you.
This year the show will be held in Bal Harbour, Fla., andpre -registration indicates that the attendance will surpass thatof previous shows. Therefore, the electronic servicing in-dustry can expect an exceptionally good sales outlook forthe remainder of 1971. As I have reported so many times inthe past, it is unfortunate that you, our readers, are unable
NEW ShowReport
From SunnyBal Harbour,
Florida
to attend functions such as the NEW Show, since you arethe key people responsible for the growth of our industry.
So that we can give you advanced coverage of what willbe presented for the first time, we are eliminating our regularproduct coverage in this month's issue. We wish to apologizefor any of the manufacturers who will be in attendance butwere unable to release material to us in time to be includedin this section. They will be covered in future months in ourregular New Products section.
Each company in this NEW Show listing is "keyed" tothe Reader Service Card provided in this May issue. Andyou can be assured that your request for further informationwill receive priority answers from them.
PROFILE OF OUR NEW PUBLISHERAlfred A. Menegus has been named publisher of Electronic Tech-nician/Dealer. Coming to ET/D as District Manager in February,1969, Al has a long list of outstanding achievements in serving ET/Dadvertisers and prospects throughout tne east. With over 22 yearsexperience in the electronics industry at senior marketing and ad-vertising levels of companies, Al brings an expertise to ET/D whichshould be favorably reflected in the future.
MAY 1971, ELECTRONIC TECHNI3lANiDEALER 29
-
meet the
eonmXcelite's where the Metrics are!A great variety of tools and sets to help you turnmost any Metric fastener or adjusting screwyou're likely to encounter ... hex socket setscrews and cap screws, hex nuts, hex head capscrews, and whatever.
All tools precision made for exact fit. Brightnickel chrome nutdriver shafts and protectiveblack oxide finished hex socket screwdriverblades. Plastic (UL) handles shaped for perfectgrip and balance.
FIXED HANDLE NUTDRIVERS
NUTDRIVER SHANKS 4I HEX SOCKET SCREWDRIVERBLADES for use interchangeably in Series 99 plainand ratchet type handles.
gammarmvo
COMPACT SETS
No. 99 -PS -41 -MM(7 Metric hex socketblades, extensionand handle)
No. 99 -PS -51 -MM
(10 Metricnutdriver shanks,extension andhandle)
REQUEST CATALOG
nationwide availability throughlocal distributors
XCELITE, INC 14 Bank St.. Orchard Park, N.Y. 14127In Canada contact Charles W. Pointon. Ltd.
... for more details circle 139 on Reader Service Card
NEW SHOW
Advance Systems Div. 700This new division of Advance Ross
Corp. has been formed to manufactureand market a complete line of MATVactive and passive products.
Amperex Electronic Corp. 701Exhibiting in booth No. D-109 and
D-111, they will provide product cov-erage for their full line of industrialtubes, a line of blank cassettes andeight -track tapes, head cleaners andchargers. They will also tell of theirnew vidicon replacement program.
Arrow Fastener Co. 702Company spokesmen indicate that
their Arrow T-75 Staple Gun Tacker( for wiring public-address systems,laying antenna coaxial cable, etc.) isnow available with a new chemicalcoated staple. These "Grip-Tite" sta-ples are said to drive deeper and pro-vide many times the gripping power ofplain staples without this special chem-ical coating.
Belden Corp. 703This manufacturer will be display-
ing its communication cable, neo-prene control cable, special data andinstrumentation cable, camera cable,hook-up wire and their line of retrac-tile cords at booth No. B-112 andB-114.
704Blonder -Tongue Laboratories, Inc.
In booth No. K-100, this companywill display their new single channelamplifier, UHF mast -mounted pream-plifier, MATV amplifier and solid-state broadband amplifiers.
Bogen Div., Lear Siegler, Inc. 705At their conference suite-Lanai
Suite L-237-several new sound prod-ucts will be displayed similar to therecently announced "C" series econ-omy -priced, solid-state public-addressamplifiers.
BSR McDonald Div., BSR Ltd. 706They will display automatic turn-
tables, component stereo systems and
eight -track record/playback decks inbooth No. D-113 and D-115. Thiswill include the "Professional" Series,Models 610, 510 and MP60; the "Pro-motional" Series, Models 310 and5500; and the "Minichanger" Series,Models 210/X and 1000/X.
Burgess Battery/Gould Inc. 707Occupying booth No. D-122, they
will exhibit a complete line of dry bat-teries, mercury, alkaline and sealednickel -cadmium batteries.
Castle 708Introduced will be an expanded
range of exact replacement and uni-versal replacement TV tuners and animproved version of the contact over-haul kit.
Chemtronics, Inc. 709Located in booth No. A-129, the
caddy -size aerosol spray tuner clean-ers, lubricants and polishers with theirspecial spray heads will be featured.
Cinch Manufacturing Co. 710They plan to introduce two new
types of connectors. One will be acomplete line of printed -circuit edgeconnectors with 0.100 in. centers. Inaddition to these new connectors, theyplan to display a new line of D -sub-miniature connectors with 0.025 in.square terminati
