M477 — Master Module

8-109 AMPLIFIER SERIES The 8-109 scries of amplifiers are utilized as an internal component within various WBS serics of 2udio console modules. Each 8-109 amplifier mounts a5 plug-in assemibly onto the module motherboard. The 8-109 amplifier provides an actively balanced output with +30 dBm capability . It is employed 35 an output Or booster amplifier with either balanced or an unbalanced input. The following specifications apply I0 the 8-109 series of amplifiers . Unit Jnput Gain 8-109 8-1094 8-109B 8-109C 8-109D 8-109E 8-109F 8-109G Balanced Unbalanced Ralanced Balanced Unbalanced Balanced Balanced Balanced 15 dB dB 18 dB 39 dB 29 dB 29 dB 33 dB 23 dB Frequency Response +7- 0.2 dB from 20 Hz t0 20 kHz Noise: -i08 dBm EIN from 20 Hz t0 20 kHz . Harmonic Distortion: Less than 0 .1% THD from 20 Hz I0 20 kHz at +30 dBrn outpul (typically Tess than 0 .027 4[ mid-band) . Source mpedance: 600 ohmns Or Tess, balanced Or unbalanced Input mpedances: Models with balanced input: Sk phms minimum; 8-1094 : 30k ohms 8-1090 4700 onms . Input Levels: Depending on gain or particular model and svster operating Tevels. (Refer [0 gain speci - Tica tions above. Output mpedance: Less than 100 ohms Load Impedance: 600 ohms, balanced 8-109-1-1

8-109 AMPLIEIERSERIES Output Level +30 dBm maximum. Power Requirements: +/ - 21.5 volts dc, 18 MA quiescent current 65 MA at +30 dBm output_ Ambient Temperature: t0 60 degrees Celsius. Dimensions: 3.25" 3.38" 0.57" (83 mm 86 MM 15 mm ) _ The 8-109 corriprises [Wo amplifier sections, one consisting of 21 with 01 through 0L, and the other of 22 with 05 through 08 _ The linear integrated circuit 21 operatcs a5 preamplifier and buffer stagc t0 drive the transistor ouipui amplifier section . In the majority of thc 8-109 rriodels, the inputs of the [Wo amplifier seclions Are interconnected as cross coupled differential pair t0 provide balanced input. Alternately in (he case 0t the 8-109A and D single-ended, unbalanced input is uscd. The balanced input yields several input characteristics similar t0 those of an input transformcr. Output Tevel remains constant when the inpul is Ted from either balanced or an unbalanced source . Good common mode rejection is another fealure of this type of input configuration For amplifiers operating in the balanced mode, the value of R1S eslablishes the feed back ratio of the [wo amplifier sections and thus controls the amplifier gain. When utilized in the unbalanced arrangement, the lower amplifier section (22 with 05 through 08) is used a5 the Input section, with the input signal applied T0 Pin E2 . Amplifier gain is determined by the values of R6 , RII and R12 One half of the balanced output signal appears 4[ pin E6 . The upper half of the amplifier (Z1 with 01 through 04) operates 25 unity gain inverting amplifier with EI externally strapped to F6 The ouiput of all models of the 8-109 series is actively balanced and is brought DUI 4[ pins E4 and E6 8-109-1-2

DESCRIPIION 8-109 AMPLIFIER_SERIES inverting amplifier with El externally strapped t0 E6 _ The output 0 f a1 1 mode ]s 0 f the 8-109 series is actively ba lanced and is brought out at pins E4 and E6 8-109-1-3

PARTS LiST 8-109 AMPLIEIERSERLES 8-109 PART DESCRIPT ION MFG MFG PART NUMBER C1 C2 C3 CL C5 Capacitor 33 uF/10 Kemet T3900336m010AS 10 uF/25 V T390c106m02545 4.7 PF Philips 2222-638-09478 C6 C7 cB c9 C1o 15 PF 10 PF 68 PF 10 LF/25 L.7 pF 2222-638-10159 2222-638-10109 2222-638-70689 T390C 1O6MO25AS 2222 638-09478 Kemnet Philips Cil C12 C13 C1l C15 15 pF 10 PF 68 pF 10 uF/25 220 uF/10 V 2222-638-10159 2222-638-10109 2222-638-70689 T390C106MO25AS T390F227M010AS Kemet C16 C17 delete CRI CR2 CR3 CRL Diode Fairchiid INLILB 01 02 03 0L 05 Transistor National PN3569 PN3645 2N2102 2N4O37 PN3569 06 07 08 PN3645 2N2102 2N4037 RI R2 R3 RL R5 Resistor 1/4w 5% 47k 47K 6K2 6k2 6K2 Philips 8-109-2-1

8-109 AMPLIEIER_SERIES Output Level: +30 dBm maximum. Power Requirements: +/- 21.5 valts dc, MA quiescent current MA +30 dBm outpul. Ambient Temperalure: 60 degrees Celsius. 25" 3.38" 0.5711 (83 Mm Mm mm) _ Dimensions: The 8-109 comiprises [Wo amplifier sections, one consisting through 04, and the other 22 with 05 through 08 21 with The linear integrated circuit operates as preamplifier and buffer stagc drive the transistor Quipul amplifier section.

the majority thc B-109 miodels, the inputs the two amplifier seciions are intercannected cross coupled differential pair provide balanced input. Alternatelyv (ne case the 8-109A and single-ended, unbalanced input uscd. The balanced inpul yields several inPut characteristics similar those an input [ransformcr Output level remains constant when the inpul Ted Trom either balanced an unbalanced source Good common mode rejection another fealure (his [ypc input configuration.

For amplificrs opera ting in Ihe balanced mode the value R1S eslablishes the Teed back ratio the [wo amplifier seclions and thus controls the amplifier gain. When utilized in the unba anced arrangemeni_ Ihe lower amplifier section 22 with 05 through 08 } used a5 the Input section, with (he input signal applied pin E2. Amplifier gain determined by the values R6 , RII and R12 One half the balanced outpul signa appears pin E6.

The upper half tne amplifier (Z1 with through 04) operates as unity qain inverting amplifier with externally strapped E6 . The ouiput all models the 8-109 series brought DUi pins E4 and E6_ actively balanced and 8_109-1-2

8-109 AMPLIFIER SERIES The 8-109 scries amplifiers are uilized an internal component within various WBS serics eudio console modules Each 8-109 amplificr mounts as plug-in assembly onto the module motherboard_ The 8-109 amplifier provides an activcly balanced output ith +30 dBm capability. employed an output boosier amplifier with either balanced an unbalanced Tnput. The following specifications apply (he 8-109 series amplifiers.

Unit Jnput Gain 8-109 8-1094 8-109B 8-109C 8-109D 8-1 09E 8-109F 8-109G Balanced Unbalanced Ralanced Balanced Unbalanced Balanced Balanced Balanced 15 dB 7 dB dB 39 dB dB 3 dB dB dB Frequency Response: Noise: +/- 0 .2 dB from 20 Hz kHz 108 dBm EIN from Hz kHz . Harmonic Distortion: Less [han 0 .1% THD from +30 dBrn ouipul (typically mid-band) Hz 20 kHz ess (han 0 .029 Source Impedance 600 ohms or les5, balanced or unba anced Input Impedances: Models ith balanced inpul: Sk ohms minimum 8-109A : 30k ohms 8-1090 4700 onms Input Levcls Depencing gain particular model and svster operating levels (Refer gain speci - fications bove Output Impedance: Less (han 100 onms Load mpedance: 600 chms balanced 8-109-1-1

"477 MASTER MOOULE

Ga in : 8 dB :!: O. S dB (wi t h f ade r i n IS dB - i n- hand" ~osition ). Frequen cy aes eens e : t o.2S dB f rom 20 Hz to 20 kHz. Nois e: 80 dB below +8 dBm nomina l output l evel ( 20 li z t o 20 kH z) . Harmonic Di s t or t i on : Le s s t ha n 0.25 1 fro~ 30 Hz t o 20 kH z at +24 dBm out put or less . ( Typi ca l l y l es s t han 0. 051 ac r os s mo s t of band _ width. ) Sour ce I apedan ce: 5u•• i n9: 30 . 000 ohllls . ba lance d . Inpllt Iap edance : 5u..1ng : Less than S oha s. Out put Imp eda nce s: At 8- 109A outp ut pins I4/ R: less tll.n 100 ohlls . At outputs II an d 1 2: 600 exes . At MON ITOR out put: 1,2000has . At METERING out put : 1 . 200 0h ls. Load l epece nce s : At i ns e r t i on point and outp ut s I I and 12: 600 ohms . ba lan ced. At MON I TOR output : 1. 200 ohms . At METER ING outpu t : 1. 200 ohms. Output leve ls: At insertion poi nt : 0 dB . nOlll i nt l . t30 dBm ma xillulll . At outputs 11 and '2: +8 dBm noa fna l. +24 dBa lIax iaua. Phas ln9 : In put and outp ut te r a i nal s designate d by numbers a r e in pha se . Powe r Require aent s : 1 Z5 volts de . 60 aA nOllinal. ZOO aA aa x1aulII. a .c

Ambient Tellllpe ratur e : 0 t o 60 degre es Cel s i us . ps BS

Dimens i ons: 1. 6" wide X 7" high X 6.S· dee p W

(41 mm X 178 mm X 165 1II1Il ) . :// tp ht

1- 1

WARD -S ECK SYS TEMS LTD .

CIRCU IT DESCR IPTION M417 MASTER MODUL E

The M477 1s desi gned to receive t he mixed f eeds fr o. e i the r .ixing ch annel inpu ts or sub.ast er inputs . Thes e combi ned ~i gnlls are a.p llf ied t o s t and a r d li ne leve ls a nd th e r e a f t er fe d to th e main prog ram ou tpu ts of the conso le sy s t e• . I npu t and Sum.lng Amp l ifier The si gnal o rl gi natlng fr o. th e exter nal IIh i ng network is ap pl le d t o the summlng c ur r ent nod es of t he i nput am pl i fi e r via edg e CO nnec t or pln s l / A. Ql through Q8 for m a su mmi ng amplif ier comp rl s l ng a balan ced inpu t an d an un ba l ance d out put . To co r rec t for s mal l sy s te m l e vel variations. tri m pot R7 i s in cor por ated as part of the pr e am pli fi er . The differentia l ba lanc e adjustment co nt ro l R6 se rv es t o min imize common mode type si gnals orig 1nat in g ahead of th e ampl i f 1e r . e12 couple s th e output Of t he summing ampl if ier t o a low-pass filter co ns is ti ng of R22 . R23, R24, e 13 , C14. C15 an d 21. The 3 dB r oll off point 15 loc . te d at ap pr oximately 40 kHz. The ou tpu t of 21 1s co upl e d th r ough CIS t o t he ou t put am pli fi er 8-I 09A. 8·I09A Outpu t Am pl i f i er and IHS( RT The S- 109A amp l if ier r aises t he nominal sign al l e ve l to 0 dSm. The ou tpu t is ac t ive ly ba l a nce d and fed to the -insert po int- I t pins 14/R.

Pi ns 14/R I re usu al ly conn ected to I nor.alled set or insert jacks . wit h t he ou tp ut si de connected t o t he sub master fader. Th e (Id e r ou tput i s retu r ned t o the . odul e on pins 8/ J. a- 109E BOOSTE R Ampli f ie r Th ls ampl ifi e r ope r a t es a t a ga in of 29 dS. It recovers the a

I S dB -i n- ha nd" l os s incu rred by th e lI i xi n9 fader .nd prov ides .c

.ddition. l g.i n res ult i ng i n • no~i n.l 11ne l e ve l of +8 dBm ps

.ft er p.s sing thr ough. 6 dB, 600 ohm Is o1. t i on ne twor k . BS W :// tp ht

2-1

WARo ~eECK SYSTEMS LTO.

Ci RCUIT DESCR IPTION H4 77 HASTER MODULE

Ou tputs Two 600 oh• • ba lan ced ou t puts are provided , on pins 17/U and 16/T re s pect i vel y , ea ch wi t h a . axi.u. ou tput ca pabi l i t y o f i24 dB. . A mo ni to r ou tpu t is av aila bl e at pins 15/S to feed the in put t o the " 475 . oni to r .o dule s . Pins 11/ H pro vi de the f eed fo r a standa rd vu . et e r ci r cuit . Solo Out put Th e sol o outpu t i s fed vi a SW10 t o pin s 7/H. The solo cont r ol appea r s on pi ns 18/ V. Powe r Suppl y Decouplin9 An ac tiv e power s uppl

"477 MASTER MODULE

PART OEseR I PT I OM K" MF G PART HUMBER

Q' r r e ns t s t c r MUion'll PN36 45 Q7 • • PN35 6 9 Q8 • • PN36 45 cs • • PN35 6 9 QlO • • PN 3645

Qll • r e xas T1PZ9 B Q12 • • T1P30 B Q13 • HUlonill PN35 69 Q14 • • PH 36 45

R1 Resisto r W 51 15K Ph fT ips • • "OJ • • 15K eee • •

."" R4 • '" '" • Trfll pot Pi her PT lOY "" • • PT lOy R8 Res is to r '<lW 5%

" RlO • • '" '" 15K Ph I l i ps • • Rll • '12 '13 • • '" 11 11 "• • Rl . " R15 • • '" 1<5 " " • ' 16 15K RI7 • 100 • ' 18 " 100 • RIO • 100 • ",0 • 100 • • • '" • 47K • a

'22 15K .c

R23 • • ". '" ps

" 15K • • BS

R25 620 • W

R26 to ://

R42 del e t e tp ht

3-2

•

8 - 109 AIoiIPLl F I ER SERIES

a .c ps BS W :// tp ht

DESCR IPTION

8~ 1 09 A.... PllF I ER SERIES

T h e 8-109 s e ri e s o f IlrT'l) llf iers arll u ti li zed a s a n In tern al c omp oo e n t w ith i n va r lnu " WBS s e r ie s o f e v e re c O<"1I1Q le modU les . Ea c h 8- 109 a mp li fier mo .., nlS all a I)I..,g - in 1I 1i ~l!1llb l y o n to t n !! mod l,O le mo t h e M>Ol;l r d .

The B- l 09 a mpl if i e r 1"'''1,1 ,<1'''' an a c ti vc ly ba la n c e d ou tpu t wit h a ~ 30 d Bm c a pab i l ity . I I 1$ II'mp lo yed a s a n ou tpu t Of'" a boo"ter a mpli fier w Ith e i the r a b '!l l"nced Of'" a n u nb illa nced Inl)u t .

The followi ng sp ec ifica tion s a pply 10 t he 8-109 se r-tes o f ampli f i e rs .

Un, t In pu t Gai n

8 _109 Bal a n c e d 15 ee 8- 109 .11 Un b al/ln c ed 7 .B 8- 10!1!) B" I"nee d 18 ae 8_ 10ge Bi1l anced 39 en 8- 1090 Unb .. I.nced 29 ee 8- 109E Ba la n c e d 29 dS 8 _ 109 F Ba la n <; ed 33 en 8- 109G B" I'!lr>Ced 23 d B

F~(luency Respon se: .../ - 0 . 2 d B from 20 Hz to 20 kHz.

No i " .. , _ 108 dBm EI N f r"Qm 20 Hz 1020 kH z.

H'!I rmoni c OiSlO r t 10n : Less Ih a n O. l ' THO f r o m 20 Hz to 20 k Hz I'It +30 d B", ou tp u t