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Electronics-World-1959-05

www.americanradiohistory.com 50- A I 8 tn 30- 4-.4 2 20 A B 0 10- 20, 2 1.-10 t- - -,,40.4 .8-8 4 4 á--65}1FD. NEEDED .7-7 3 100-10'--_ .6-6 ? 200-20 5-5 40040 _ 4 4 = 800-80 O " FOR 300 CPS __;,:3-3 a LL I CROSSOVER a. ¢ } .2 2 F ani á a .15 1.5 au TWO -WAY 6DB PER OCTAVE NETWORK (A) TWO -WAY 2 DB PER OCTAVE NETWORK (B) i/ 2 Chart 2 (Left). Auxiliary chart to be used in conjunction with Chart 1 for determining the value of capacity needed . to cross over at a given speaker impedance. To use chart, simply lay a straight edge between the point on the first column representing the impedance of the speaker and the point on the last column representing the crossover fre- N Chart 3 (Below). The actual inductance values of network chokes used in the master Chart fiti 1 are given here. This chart makes it possible to wind coils of given inductance if the construction details shown along the bottom axis and in the drawing at the center of this page are followed. Inductance values from about .03 ti up to 20 millihenrys are covered here fa ME1 = ======= NMMMMMMMM 20 ai...... 10 8 6 5 4 3 am oms>rmm Il 2 1.0 INNfiNfi 8 .6 .5 4 mom= 3 _IIum milmÌI ommimmommmuÑmumummumm 2 1OMPAOMMOOMMOMMOMMOMMOMOOMOMM 111IIIIH111111111111111111111 u_il IO 08 .06 05 .04 LT. C .03 ::.......ra....... .02 .01 1111111111111111111111111111111 2 4 6 8 10 12 14 16 18 20 22 24 26 28 LAYERS O O N CO O r CO < W O CO N W f0 N Of N r PI ñ h f r f O N quency desired. The point where the straight edge crosses the center column is the value of capacity required. Be sure to use the two columns marked "A" together, or the two columns marked "B" together. This chart is to be used for a 6 db per octave network only. In order to obtain capacity values for a 12 db per octave network it is only necessary to divide the value of capacity obtained by. 1.41. For the lower values of capacitance, oil -filled capacitors are preferred. For the higher values, electrolytics are employed. i MOOMOMliíM H1111111111111111111iI11111 moMmun summummommommo 111/1/11 R 11111111111111111 1 111 M M Ñ r o r- m TURNS 1/2 I 11/2 2 21/2 POUNDS p rff r0 f` m Of COIL DEPTH °D'; O h Ñ m COPYRIGHT 1259 ZIFF -DAVIS PUBLISHING COMPANY. ALL RIGHTS RESERVED.

0 w z cc w 0 (1) N 0 re V I i I CROSSOVER FREQUENCY (KC.) -4- n oor- tcnv 1-, 35 *18 ENAMEL WIRE 111111111MI11111 II 11 111 111 111111 III MI II 1 MEW ME IIIIIIIIIMIII EEL 111J111 11SJIMaf lafaNI1I/,Na.NMI MN III111111111111111111I1IIIII Y11 iI1111111111111111111IIMIN11I Bran IH11111111111111111111IIIII IIIII111111111111N MEOW II 1MI MM Ell MI MEEIIIII111111111111111111111111111111111111111111IIINN1MIN ' II ' MIN NMI Ill 30 Ill1IIIIIII11111111IMMIIIIII Mi1 ME MEER 1 11111111111 IIII MEN EM MOM NI 111111111112111111111 111111111111111111II I1 11111111111 ME' 1E IE N Ural 11101101 Mara I 11111111111111111111111 MIN III 1111MMI MEMO MOM NI MEIIIMIIIIII11111111111111II111111111111111111MN11 MIEI I' II 11111E111 n1 MM1111IIIIIII11111111111111IIII 11 111111111111111=111 IIIIINMI =NIM IM111 IIIIIII1111111111I11111111111111 11111 MIMI IMME Il MI111111111111111I111IIIIII IIIIIIIII 11111 NNW BIIIIIIHH111111 I==I111/ MMII INN Ind NMI mum minim Ammo 11mi1/r IE MEMO iMNUM 1IIHH1111111111111111MUM III Ill III/ 111111E 1111111111 I MEW Ill 111111111"111 NEMINHI1111111111111111111IIMH IIIII III IIII1111111IEI1MIf 1MMI ;MI 25 1MMMIN1111111111111111111III III Ill IM II ' I 11111 111111MN1I=1=E Mad I1111 1111111111111111111111111III Ill 111I1III 1111111=11 MME IIMI III 1MI IMM111111111111111111M111 11111111111 1111111M MI111110111 l1 MIMM11111111111111111111111MII' IIIIIIIIIIr 1111111= 111111MI MEE= I JI MI1HI1111111111N11111MII IOI1111111 .1111111 raraaf 11EI 1I ,1' 11I MNMIII11IIIIIIIIIIIIIIIIMMM11111111111111I11111i1a1t E ÍI II NI NMIIIIIIIIII/11111111111IIIMII 1 HIIIIIII11111111111M 11I1E1 MEMO 11M MIIIIIMII1111111111111111INMI11111111111111111111 III 1I111111I I/111 HH11111111111111111111 M111111111 111111111W MIMEO NN II =MIMI MIMI MIMIIM11111111111111111111111111111111 III 111111111 AMIN= I MEEM A1 11 IU11IH1 I1I III inno Mil MOOSE/ 1111111111 ,Illnuu /MaEM MaII WM 111IIII11111111I11111111MMIN'IIIIIIIIIII mom M=1N 111 OBI II 1N111111111111111I1111I HHIIIIII 11111111111 M11 IE 111NEEI ,EEM IM' I NMMM1II111111111111111111111111111I1,11111111111M==1II'MENI MM 1 MMMIIIIII111111111111111111' 11111111111I1111111111' MIMIEII I/ N' .15 IMO MI I1 1111IIII111I1111111111111111I1/ IIHHIIII' 11111111111 AMMIE1/ E'E1, IIIIIIM11111111111111111MM/ WM 111111III11111I1II1I111' Mmm / a1s, maim 1I111 IIII INN 11111111111111II11/'IIIIIIIIIf 11111111111 =I=M/1N/AMENS II NMM1IIH111111111111111111IIII/III1I1/II MIMI /111111P IIf7tI II7/ 117111 IIIIIIMIIE1111111111111V,1'llf,H 1111111 111I111,1N ENE 111'II / INN IN' 1111/ 111 1111111111 11111111111 /III II/ SE 1III1111111' N VINE/1M AN Mal ,111 MI 15 MENE Bull MINIM 111111I111/11,1/ WAIF Ill 111111IA1IIM1I I,II'IIMI/ MIMI f 1 MI 1 I ES =Gr-N MD / IMMIIIIM1111111I11ÌÌÜÌÌÌÌ ÌÌ Ìi ill ÌÌÌÌ iÌ Ì IS ÌIÌÌ 1111111IIIMI1111I 1111 1111111111/ I1MM MP I,E II 1 III 11 IIMI1 Mel 11H11111111111111111M11111 I I1II1111111 1110E1=11 M MI II IOW 1 MI 11 1 10 5 2.5 .2 1111111111 1111111111 1111111111 IN I I/ III 11111111111 111I INN I/ II 111 II EMI MMMIMM1111I1111111111111111'/1/,I/11 II/ /1111111111'rara IJII/INII' HMI .NI MIMI/IM111111111111111I,/ MINI Al Alf ¡IV 111' Haar /MI MIIIM1111111111111111 WMIMail I/N IN AIM! I'/IIII .1/ O.0 /H'.II/I1111I/,IIII1111II1I'I IIIII MI M II I11N1 MOM HH1111111111111.11II/Ir II/1111111111".111/I=rMII/I/I'II1EI1I 1111111111 /IJMI171 III 1111111 .1 II.M'i1/IMP AI'1111111r1111'.11MN'/ I'1II'/Ir' ANNE 1NNIIM11 I'MEW 11111I111111'II.1I WM/ IV1111111 Ell' 111III 'PS /,I/IMIN /II11 I MMIMIMIIIII1111111111' I/ ill A/111I/1/II1111/ 111 111111 Mar Mr MN MI1I /I IO11111 III' 1 NIP //111',1111'41 III II Il1' I/I //,II' I/1 'I r l' AM' I' /1 IMM1MIIIIE11111'l'11'd'.MI H',111111' III' .111111/Ill,II'/ N /I EIII1I/ II el 1IIIIIIIIIIIIII' / l'J/'IIIr.I1/1Ir 111111' 111'.II1II11 I/I IIEI.I M1'AI MI 1IIIIIIIIIIIII' N l'.Ir.111'II/'/1//HIWar 1111111./,I/ /I/III N AMP' AV MIMI MIMI 11111011111111111111111`111 111W I Ar.111'.1r.11/ I11I11/II'.IIII III,III /I'/ II ANEW MI, AEU MIMIII11aA1/U'./ ll d' 4111 I Il .ab1l I/II:n1111'III/L.[lt.Ir,11 r IN'IAIWA EOM IIIIIII11 11'.111111111111 I/MINIM 411111111f .1111 MrI I II 1 /' N nI.M MI MI 111111111111111111111111,4111 IIIII II11INNN IH/.11111111'.111'. ==/ H'/ MNEM MU MI 111I IM11r AIM 11111IIr'1 MM1Ml IVA 1111141 l/'./1 1==I.11111N HI. M MEN MIMI 00111111P',/ 111/111111 r:111Mel If III11111'dll'dl1 MIME mm'I M H'I MIMI II II df IIMI1'./Ill Illr',lllr,I1111 MEMI.MINI.'IMIII MIII'/I11111I/ Ir .d 11L 11III/'.1III11r'./I Ir'.II IIIII MI/ ral=L M'4 M M1 IMI NI I1/;1IIII1111/ I! 1 :11111I11111/ il 11111!d11'd11111111/ I 11V/111I1I llI'11111111. 11iI IIP.IIP.IIIII IIIII I/mMI 1 IIIl1I11.It11111111111'II/.111'1111111111PiMN11'IIII 1/.M 11 1 /IMIMr'.111I111111111'411/'.IIIIIIIIIII-.Jmor amNII/1I1 qr m o ó N f O o 0 r b0 N N N NN COIL LAYERS cu r e * 0 Ñ O) 1 Ñ 0 0 N N m o a Ó lb /` a. ow COIL TURNS 1/2 I 11/2 2 21/2 WIRE WEIGHT (LBS.) f' f P 10 Ir) f 1a 10 r a) Ca N 111 e N COIL DEPTH D,. (INCHES) N Formerly RADIO ELECTRONIC WORLC Chart 1 (Above). A master chart giving all physical winding data for crossover network chokes based on speaker impedance and desired crossover frequency. Choose the speaker impedance on the vertical scale, move over horizontally to the curve which represents the desired crossover frequency, and then move down to the horizontal scale which gives all the vital statistics of the coil needed for the chosen conditions for a 6 db per octave network, shown in circuit (A) to right. To use chart for 12 db per octave network, circuit (B), simply multiply speaker impedance by 1.41 and proceed as above. The physical make -up of the choke coil that is employed must be as shown at the center of this page.

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