M479 — Dual Auxiliary Module

M479 DUAL_AUXILIARY_MODULE The M479 15 des igned to receive the auxiliary output feeds originating from the WBS M47o and M473 input and submaster modules combine them and permit Teve] adjustment 0 f the combieed output mix. Two AUXILIARY outputs are provided per mo du | e Input and Summing_Amplifier The signa origina from the IMirz external mixing network is app]ied to the SUMMI current nodes 0 f the input_ampli- fier via 1/2 0 f the module edge connector An' EXTERNAL 088n5 60 , ohm input provided a t pins 6/7 which May be used For talkback or cue input feed This input 15 designed to operate from dBm , 600 ohm source 21 and ZZ with their associated components form the input s umming preamp]ifier for chamne | The gna from the preamp ifier output i5 coupled through c6 to R1l the Teve1 contro] the SUMMING input for channel appears at pins Similnd" Yhe 3/4 and EXTERNAL bridging input a t Pins 8/9 23 and 24 form the preamp]i fier.

R2Z i $ the Teve contro] for channe] Output Amplifier The channe] signa] is routed through switch SW1 to the actively ba anced output amp]ifier comprising Z5 _ 26 , Q1 through Q4 and their associated components The MAIN output for channe] appears at pins 11/12 0 f the module edge connector The nomina ] Teve] at this point 15 +8 dBm into 600 ohm Toad T f dBm nomina 1 output i $ required the shorting ink J1 may be removed t0 reduce the ga i n 0f the output amplifier by dB .

The MoniToRING output for channe / appearing at Pins 13/14 0 f the modu Te connector is intended to feed VU meter and the required inputs to the moni toring circuitry The atter should have 30k ohm bridging impedance or higher 2 -1

MFG MFG PART NUMBER 73 24 25 Integrated circuit National LMBOTAN 26 27 28 WBS recommends thc use OT replacement parts made by The specified manutacturers for continued opti mUt equipment performance. 3-5

WB S M479 Auxiliary Teve conifo| R?2a Towt outpui Teve 07 both channe| output adjus [ (he Auxiliary Gwltch SwZ: When depnessed (he channe 9nj itched ON und appears both channe outputsa S [mu | caneous|Y (ne Led anna nated: space For channe icentif IcetIon des IgnatIon. auxiliat eve conirol RU Tows output Teve 06 both channe oulputs adjus ( che aux| (ARY switch Swi Hhen depressed; Lhe channe igna Ttched ON uppedrs both channe outoutse 5 imU tancousl, the LED ium nated: REDRAWN REviSION Ivo/77 ussue DATE WBS WARD-Beck ByBTEME DRNPiey M479 ENG; CKD PuL DUAL AUXILIARY MODULE APP

MFG MFG PARI_NUMBER 73 25 z5 28 Integrated Circuit Nationa LM3OIAN WBS recommends thc use replacement parts made by Ine specified manufacturers for continued opimum equipment performance 3-5

M479 DUAL AUXILIARY MODULE PART DESCRIPLION MFG MEG_PARL_NUMBER IN4148 CR4 CRS Fairchild CR6 CR? CR8 CR9 CRIO Motorola IN4003 DSI D52 LED red Fairchild FLVI1? Transistor National 2N3569 2N3645 2N3569 2N3645 2N3569 02 Q5 2N3645 2N3569 2N3645 08 Resistor 1/4 5% 30k 30k 22k 22K 620 Phillps R? R3 R6 R7 R8 R9 R1O ISK Trim Pot Resistor 1/4w 57 Piher Philips PT 1OV Sk 12K 620 30K R11 R12 R13 R14 R15 Potentiomcter Resistor 1/4w 59 A/B Philips WBS 10-015 30k 30k 22k 22K 3-2 Diode