M497 — Dual-Master-Module

8-109 AMPLIFIER SERIES The 8-109 series of amplifiers are utilized as an internal component within various WBS series of audio console modules . Each 8-109 amplifier mounts as plug-in assembly onto the module motherboard. The 8-109 amplifier provides an actively balanced output with +30 dBm capabil ity. It is employed as an output or booster amplifier with either balanced or an unbalanced input_ The following specifications apply to the 8-109 series of amplifiers. Unit Input Gain 15 dB dB 18 dB 39 dB 29 dB 29 dB 33 dB 23 dB 8-109 8-109A 8-109B 8-109C 8-1090 8-109E 8-109F 8-109G Balanced Unbalanced Balanced Balanced Unbalanced Balanced Balanced Balanced Frequency Response: +/- 0.2 dB from 20 Hz to 20 kHz. Noise: -108 dBm EIN from 20 Hz to 20 kHz_ Harmonic Distortion: Less than 0.1% THD from 20 Hz to 20 kHz at +30 dBm output (typically less than 0 .02% at mid-band) Source Impedance 600 ohms or less, balanced or unbalanced_ Input Impedances: Models with balanced input: Sk ohms minimum. 8-109A : 30k ohms 8-109D : 4700 ohms. Input Levels: Depending on gain or particular model and system opera ting evels. (Refer to gain specifications above ` Output mpedance Less than 100 ohms Load Impedance: 600 ohms, balanced. 8-109-1-1

WAAD-BECK SYSTEmS LTD_

8-109 AMPLIFIER SERIES Output Level +30 dBm max imum. Power Requirements: +/- 21.5 volts dc, 18 mA quiescent current_ 65 MA at +30 dBm output _ Ambient Temperature: Dimensions: to 60 degrees Celsius. 3.25" 3. 38" X 0.57" (83 Mm 86 MM 15 mm) _ The 8-109 comprises two amplifier sections, one consisting Q1 of 21 with through 04, and the other of 22 with 05 through 08 . The linear integrated circuit 21 operates as preamplifier buffer and stage to drive the transistor output amplifier section In the majority of the 8-109 models, the inputs of the two amplifier sections are interconnected as cross coupled differential pair provide to balanced input _ Alternately , in the case of the 8-109A D , and single-ended, unbalanced input is used . The balanced input yields several input characteristics similar those of to an input transformer Output level remains the constant when input is fed from either balanced or an unbalanced Good source . common mode rejection is another feature of this type of configuration_ input For amplifiers operating in the balanced mode, the value of R15 establishes the feed back ratio of the two amplifier sections thus and controls the amplifier gain. When utilized in the unbalanced arrangement, the lower amplifier section (22 with 05 through Q8 ) is used as the input section, the with input signal applied to pin E2 _ Amplifier gain is the determined by values of R6, RII and R12 One half of the balanced signal output appears at pin E6. The upper half of the amplifier (21 Q1 with through 04) opera tes as unity gain inverting amplifier with E1 ex ternally strapped to E6 . The output of all models of the 8-109 series is actively balanced is and brought out at pins EL and E6 . 8-109-1-2

WARD-BECK SYSTEMS LTD_ PARTS LiST 8-109 AMPLIFIER SERIES 8-109 PART

M497 DUAL MASTER MODULE Output Leve1 Program: . +8 dBm nomina 7 +24 dBm maximum Monitor: +8 dBm nomina 1 +24 dBm maximum Mono +8 dBm nomina 7 when summed into second M497 Channel Separation: 60 dB between Left and Right channels (50 Hz to 15 kHz ) Phas ing : Input and output terminals des ignated by numbers are in phase Power Requirements +25 volts dc , 50 mA nomina 1 200 MA maximum. 0 to 60 degrees Celsius Ambient Temperature: Dimensions : 1.6 " wide X 7" high X 6 . 5 " deep (41 MM X 178 Mm X 165 mm ) 2

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WAAD-BECK SYSTEMS LTD_

M497 DUAL MASTER MODULE The M497 accommodates two separate signa ] channels It is designed to receive the mixed feeds from the left and right mixer buses 0 f console The two s i gna 1 are independently processed and amp]ified to tandard Tine Tevels The outputs 0 f the M497 supply the ma in program outputs 0 f the conso]e system_ Both channeIs operate in similar manner The fo]owing description refers specifically to the LEFT channe/ Input The signa ] originating from the external mixing network enters the module at pins 1/A and is applied to the s umming current nodes 0 f Z1 and 22 _ 21 through 23 , with their associated components provide an actively ba Ianced input a $ wel1 as ba lanced output The output operates at nominal Teve1 0 f 0 dBm and appears at pins 6 / F . Insert A balanced INSERT point is provided between pins 6 /F and 8/J , permitting the insertion 0 f an externa] equalizer filter or compressor, either using an M499 insert switcher or by direct wiring Level Adjustment From the INSERT point the signa ] is returned to the mo du ]e at pins 8 / J and fed to the 8-109E output a mplifier via an attenuator network_ R42 is Teve1 trim potentiometer permitting adjustment 0 f the mo du le output Teve1 from -6 to +2 dB with reference to the nomina] Teve1 0 f +8 dBm . A sma ]1 ho ]e in the modu le front pane 1 a ]ows access to the trim control . Qutput The 8-109E output amp]ifier operates with ga in 0 f 29 dB It recovers the Toss 0 f the input network and provides additiona] ga i n to produce nomina 7 Tine Teve1 0 f +8 dBm at the output 0 f the modu le 60 0 ohm resistive dividing network having loss of 6 dB _ is inserted between the 8-109E and the two module outputs at pins 12/N and 13/P Each 0 f the two outputs has maximum drive capability 0 f +24 dBm into 600 ohm Toad- 2 -1

WAAD-BECK SYSTEMS LTD_ CIRCUIT DESCRIPIION M497 DUAL MASTER MODULE A separate MONItoR output is provided, designed to feed the M495 STEREO MONITOR module as we]1 as to drive standard VU meter RIGHT Channe] and MONO_Qutput The right channel 0 f the M497 operates in the Ieft channel a $ described above . manner similar to For the Mono output both channe] s are combined and appear at pins 11/M_ The s i gna 1 Teve 1 0 f this output is such that , when connected to the summing input 0 f second M497 it will produce an output 0 f +8 dBm , with the Teft or right channel 0 f the first unit operating at +8 dBm . Power Supply_Decoupling An active power supply decoup] ing network consisting 0 f Q1 through 06 provides isolation between the module and the +25 volt upply ra i]s Transistors Q3 and Q6 monitor the supply current In the event 0 f excessive power supply demands , such as from component failure or amplifier overdrive , the current flowing through Q1 and Q4 wi1] be limited 2 -2

WAAD-BECK SYSTEMS LTD

M49 7 DUAL MASTE R MODULE

PART DESCRIPTI ON MFG MFG PART NUMBER Cl Capacit or 330 uF/ 6 V Ke met T390 F337M006AS C2 " " " " C3 " " " " C4 " " " " C5 " 47 pF Ph i lips 2222 -6 38-7 04 79 C6 " " " " C7 " 100 pF " 2222 -6 38-7 0101 C8 " " " " C9 " 4.7 pF " 2222-63 8-0947 8 CI0 " " " " Cll " 150 pF " 222 2-638 -70 151 C12 " " " " C13 " 47 pF " 2222 -638 -70479 C14 " " " " C15 " 100 pF " 2222-638 - 70101 C1 6 " " " " C17 " 4 .7 pF " 2222 -638 - 09478 C18 " " " " C19 " 6. 8 pF " 2222-63 8-0968 8 C20 " " " " C21 " 33 uFIl O V Kemet T3900336MOI 0AS C22 " " " " C23 " " " " C24 " " " " C25 " 22 uF/2 5 V Phi l i ps 426 ETF22 C26 " " " " C27 " " " " C28 " " " " C29 " " " " C30 " " " " C3 1 " 2200 pF Ase lco CQ92-MC -222M a

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WARD -BECK SYSTEMS LTD .

PARTS LI ST M497 DUAL MAS TER MODULE

PART DE SCRI PTI ON MFG MFG PAR T NUMBER Ql Tra ns i s t o r Texas TI P29B Q2 " National , PN3 569 Q3 " " Q4 " Texa s TI P3 0B Q5 " National PN 3645 Q6 " " " Rl R2 Resistor " "W5% 15K 15K Philips " R3 " 15K " R4 " 15K " R5 " 15K " R6 " 15K " R7 " 15K " R8 " 15K " R9 " 15K " RIO " 15K " Rll " 15K " R12 " 15K " R13 " 620 " R14 " 620 " R15 " 12K " R16 " 12K " R17 Trim pot Pi he r PT 10V 2K R18 Resistor " W 5% 11K Philips R19 Tri m pot Pih er PT ·10V 2K R2D Res i st or ~W 5% 11K Phil i ps R21 " 620 " R22 " 620 " R23 " 8K 2 " R24 " 8K 2 . " R25 " 15K " a .c

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R27 " 620 "

8-109 AMPLIFIER SERIES 8-109G AII parts as per 8-109 except as noted below PART DESCIPTION MFG MFG PART NUMBER C6 C11 Capacitor 4.7 PF Philips 2222-638-09478 R15 Resistor 1/4w 5% 2k4 WBS recommends the use of replacement parts made by the specified manufacturers for continued optimum equipment performance. 8-109-2-5

LEFT LEVEL INSERT SUMMING INPUT PRE 8-109E PROGRAM OUTPUtS W +8dBm 600 ohm LEFT EXTERNAL INPUT 0 dBm 600 ohm MW MONITOR OUTPUT MonO SUMMING OUTPut RIGhT LEVEL SUmMinG INPUT PRE (8.109E. PROGRAM OUTPUts +8 dBm 600 ohm RIGHT EXTERNAL INPUT 0 dBm 600 ohm Monitor OuTput 3 1/81 DESIGNATIon REVISION GEB 7/78 8-19E WAS 4-1O9E ISSUE |DATE REVISION APP WBS WARD-BECK SYSTEMS DRN: MRW ENG RKB CKD M497 DUAL MASTER MODULE FUNCTIONAL DIAGRAM APP 437A SCALE 3 ISSUE 3 497-01-001

Rs Jsk ~Ci 238/6 Rg %Sk ~(54 Rig 52o ~C9tt Re JsK ~C243*k ~Rio Jsk ~(04: R2i 52 C7+ ~r7jx ~cs4so/6 Rii-SK ~C631 Ri4-629 (lo*t RB J5K ~64330/6 K29 JWisv Riz # R75 15K ~014s1e ~C34_047 Rzz R2B-6z0 008* (zo" 8p (3o 4E5v R74 Z5k C33 2047 Rz7 52 (9t4 R44 2k (Richt) zi LM3ol RI7 2k 22 LMSOl 23 Lh3oI 24 LMSoI Ris Zk 25 LASOI 26 L4soi Ris Jak ~(7 %_CIlr Rib JK R2sek? R29 JsK ~(15573C22-eY ~(2iml6 Rzs "sL R7z 122 Ri6 4 ~C8er Ci245oe ReoMs R24 Bx? Rjo JsK RI JSK ~Cig Joop r72 J RZ Kk R26 I5K 2024 M~C (23%0 L~R3 JK R3; J5K I R4 Jsr R3z I5K R76J -R3 Ek R77- R34 !52 R79- J Rzo-II R78-I R3s Lk2 -Rs7 Lt R3e LK? R4o J 2E7 R4s 440 932 "Zto06 0 IE6 E2 ES K R394o Rli C5i Iloof RSI J5t RS3-Jik Rsz IX R54 JEK R45 _ -R46 _0 R47 3oo R4B 322 Rag 42 Rso22 R6ilss Rss * RSo *2 Rs7_*9 R58 25 IE4 0 8' R42 2k (LeFD) Ze1 2e4 R5 22 Roo49 Roz W WBS CANADA 7-113 Pn3sk9 Fn3569 8 8 Qi hipz98 zes 0 P43645 P445 234 0 44 4 J323/4 C26 38 $ 138 32882 C25- 305 04 Ttlpsd !0 Ie} C27-22126 C28 40$ 3 F4-9 3627 2 2/78 R76 To R79 ADDED Issu (DATE REVISION Via luu APP WBS WARD-BECK SY3TEMB DRN: MRW ENG.MRw10l77 CKDBA; APp: ScALL M497 DUAL MASTER MODULE COMPONENT LAYOUT ISSUE 497-06-001

L. Summing in R: Summin in Shield 2 2 L. Insert Send R: Insert Send L Insert Rtn R Insert Rtn A L Summing in + B 2 R Summing in C Shield 2 5 2 6 L Insert Send 7 R Insert Send 8 L Insert Rtn + 9 R Insert Rtn 10 2 11 Mono Out + 12 L Out + 13 L Out 14 Shield? 5 15 R Out + 76 R Out + 17 Shld? 18 2 ] 19 +24v DC 20 +-Com 21 24v DC 2 22 Chassis Gnd Mono Out - L Out _ L Out Shield? R Out - R Out . Shld? 2 2 2 2 2

M497 DUAL MASTER MODULE PART DESCRIPIION MFG MFG PART NUMBER C1 C2 C 3 5 C Capacitor 330 uF/6 V Kemet T390 F337M0064S 47 pF Philips 2222-638-70479 Cg C8 C9 C10 100 PF 4.7 pF 2222-638-70101 2222-638-09478 C11 C12 C13 C14 C15 150 pF 2222-638-70151 47 PF 2222-638-70479 100 pF 2222-638-70101 C16 C17 C18 C19 C20 4.7 PF 6 . 8 PF 2222-638-09478 2222-638-09688 C21 C22 C23 C24 C25 33 uF/ 10 V Kemet T3900336M010AS 22 uF/25 V Philips 426ETF22 C26 C27 C28 C29 C30 C31 C32 2200 pF Aselco cq92-MC-222m CR1 CR2 CR3 CR4 Diode Motoro]a 1n4003 3-1

WAAD-BECK SySteMS LTD_ PARIS LIST M497 DUAL MASTER MODULE PART DESCRIPIION MFG MFG PART NUMBER Transistor Texas Nationa] TIP29B PN3569 8 2 5 Q6 R1 Resistor Gw 5 % 15k R2 15k R3 15k RS 15k 15k Texas Na tiona ] TIP3OB PN3645 Philips R6 R7 R8 R9 R10 15k 15k 15k 15k 15k R1l R12 R13 R14 R15 15k 15k 620 620 12k R16 R17 R18 R19 R20 12k Trim pot Resistor XW 5 % 11k Trim pot Resistor sW 5 % 11k Piher Philips Piher Philips PT 10v 2k PT 10V 2k R2 1 R22 R2 3 R24 R25 620 620 8k2 8k2 15k R26 R27 R28 R29 R30 15k 620 620 15k 15k 3-2

WAAD-BECK SYSTEmS LTD PARIS LIST M497 DUAL MASTER MODULE PART