M473A — Submaster 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

M473A SUBMASTER_MODULE DIRECI_Output and MONITOR Outputs The DIRECT output appears at Pins 15/$ Two more isolated out- puts are provided at pins 16/T and 17/U_ The two Tatter outputs may be utilized a5 metering and/or monitor takeoffs Care should be taken to restrict Toading 0 f these outputs to 5k ohm or higher MASTER_Outputs Two a55 ignab]e MASTER outputs are made ava ilable via Swi tches SW4 and Sw5 to pins 10/L and I1/M respectively R30 i$ Teve 1 trim contro] a ] owing to correct for Sma 1 1 system Teve 1 varia- tions AUXILIARY and SOLOOutputs Four AUXILIARY outputs are made ava iTable each equipped with it5 own a55 i gnment switch. AUXILIARY outputs and 3 are preceded by Teve 1 contro] R39 with contro] R42 feeding AUXILIARY outputs 2 and 4 R39 and R42 are preceded by PRE/POST selector switches SW2 and SW3 respectively_ An additional feed i$ supplied to the SOLO output via a5 5 i gnment Swi tch SW1o Control Functions A series dc contro] contact closure i5 provided through simultaneous operation 0 f the SUBMASTER on switch SW1 and either one of the MASTER ASsIGNMENT switches Sw4 or SW5 further contro] contact is ava iTab ]e on the SOLO switch SW1o_ Power Supply_Decoupling An active power supply decoupling network consisting 0 f 09 through Q14 provides solation between the module and the +25 volt supply raj]s Transistors Q13 and 014 monitor the supply current . In the event 0 f excess ive power supply demands such a$ from component failure or amplifier overdrive , the current flowing through 011 and Q12 will be Timited 2 -2

WAAD-BECK SYSTEMS LTD PARIS LISI M473A SUBMA STER_MODULE PARI DESCRIPIION MEG MFG PARI_NUMBER C1 C2 C3 C4 C5 Capacitor 330 uF/ 6 V Kemet T390F337M006AS delete 10 PF Philips 2222-638-10109 C6 C7 c8 C9 C10 15 pF 3 . 3 pF 2222-638-1015 9 2222-638-09338 10 uF/25 V Kemet T390c106M025AS c11 C12 C13 C14 C15 33 uF/1O V 1500 pF 220 PF 100 pF T3900336M010AS CQ92-MC-152m 2222-630-03221 2222-638-70101 Aselco Philips C16 C17 C18 C19 Czo 10 pF 4 7 PF 33 uF/1O V delete 0.022 uF 2222-638-10109 2222-638-09478 T3900336M010AS Kemet Aselco Cq92-Mc-223m C21 C22 C23 C24 C25 0 . 022 uF 22 uF/25 V Aselco Philips Cq92-Mc-223m 426ETF22 CRI CR2 CR3 CR4 CRS Diode delete Motoro]a 1n4003 DS 1 Light bulb Schadow L22 , 28 V Q1 2 8 3 5 Transistor Nationa ] 2n4401 2n3605 3 -1

WAAD-BECK SYSTEMs LTD_ PARTS LISI M4Z34_SUBMASTER MODULE PARI