M415 — Mic/line Amplifier with compression

M415a GA IN: MICROPHONE INPUT: 88 dB Max _ Transducer) LINE INPUT: 10 dB Max (Matched) MICROPHONE SENSITIVITY -70 dBm -60 dBm -50 dBm LINE SENSITIVITY +8 dBm Nominal dBm FREQUENCY RESPONSE: dB 30Hz to 15KHZ EQUIVALENT INPUT NOISE: 124 dBm TOTAL HARMONIC DISTORTION: Less than 1% from 5OHz to 15KHz with up to 20 dB Compression and Output set for +18 dBm_ SOURCE IMPEDANCE: 150 ohm balanced.

INPUT IMPEDANCE: Greater than 750 ohms balanced microphone 600 line INPUT LEVEL: Microphone -70 to -20 dBm (-60 dBm Nominal) Line 0 to +18 dBm (+8 Nominal) LOAD IMPEDANCE: 600 ohm balanced_ OUTPUT IMPEDANCE: 150 ohms balanced OUTPUT LEVEL = 20 dBm maximum COMPRESSION RATIO: 5:1 COMPRESSION RANGE : 30 dB

M415 CONT ' Da ATTACK TIME: Less than 100 micro seconds RECOVERY TIME: second, seconds , seconds_ PHA SING: LoW terminal number of input in phase with low terminal number of output. MUTE: Internal mute relay controlled by closure to ground energize to unmute POWER REQUTREMENTS: 1l5v AC 6VA AMBIENT TEMPERATURE : 0o to 508c DIMENS IONS : 2 "H X 7 "W X 16"L WEIGHT : 5lbs OPTIONAL NOISE REDUCTION: EXPANSION RATIO: 2:1 EXPANSION RANGE : 10 dB EXPANSION THRE SHOLD: Factory set 10 to 20 dB below compression threshold_ ATTACK TIME: Less than 50 micro seconds RELEA SE TIME: 100 milli seconds_

Page 1.

SY[{.BOL DESCRIPTTON MANTUFACTURER PART NUMBER

BPl-6 Binding Post Johnson 111 Series c1 Capacitor 100 mfd 16v Siemens c2 " 220 pfd -lOOv Erie 8101-100-W5R0-22 IK c3 " 10 mfd 25v Kemet K10 E25 e4 n 470 pfd Erie 812 1-100-coco-4?0K c5 " 10OO pfd -100v Erie 812 1-100-w5RO-102K

c6 ll 10 mfd 25v Kemet KI0825 c7 tl 330 mfd 6v Kemet K33086 CB tl 100 mfd 16v Siemens c9 tl 0.47 mfd t1 ]-.47/400v cI0 ll 10 pfd -63v Philips C333BB/NlOE

cl1 tl 22OO pfd Erie 8121-100-w5R0-222K cr2 tl L2 pfd tl 8101-100-coco-120K c13 il 47 pfd. ff 8121-100-coco-470K cL4 l! 10 mfd 25v Kemet Kl0825 cl5 t1 I00 mfd 25v Siemens

c16 ll 680 pfd -100v Erie 8111- 100- w5R o- 681K cL7 It 100 mfd 16v Siemens cl8 tl 4700 pfd Erie 8121- 100- w5R 0- 472K cl9 l1 12 pfd ff 8r 01- 100- co c o- 120K c2A tl L2 pfd il rr rr " -120K

c2l tl 4700 pfd Er ie 8121- 100 4r 5R O- 472K c22 It I mfd 35v Kemet KlE35 c23 tl 100 mfd 16v Siemens c24 tl 100 mfd l6v It

ll e25 ll 100 mfd l6v

c26 tl 100 mfd 16v Siemens ll c27 il 5OO mfd 3 5 v c28 tl 500 mfd 3 5 v tl

c29 tl 47 pfd Er ie 8121- 100- coc o- 470K c30 It 47 pfd ll I n l l i l

cRl Diode Silcon Zener I/R rN 753-A 6.2V cR2 It ll Fairchild IN 914 cR3 I !l l t I

n a t cR4 ll L

u cR5 tl

M415 COI{PREFSOR. AMPLTFTER

PRELIMTNARY SUNE 7I PARTS LTST CONT'D Page 2.

SYMBOL DESCRIPTTON MANT.IFACTURER PART NIIMBER

cR6 Diode Bridge Motorola NIDA 942-4

DS1 Neon Pilot Lamp Alco B\IF-2 Fuse Post Buss 342AO4 F1 o.25A tl Fast alow F2 0.25A. ll

F3 0.5A tl n n

J1 Connector Cannon )(LR-3-31 (F) J2 ll )cLR-3-31 (r) J3 ilack Bayly BE 239-A J4 Connector Cannon )cLR-?*s1 (r) K1 Relay 4C Al1ied Tr 163 cccc P1 Connector (Cable) Cannon )GR-4-t2e P2 Connector Chassis |l )(LR-3-32 (M) PCB Printed Circuit Board WBS 1-116

Q1 Transistor Silicon Motorola 2N 4401 Q2 Fairchild 2N 3645 Q3 ,, FET ll 2N 4360 It Q4 RCA 2N 2102 Qs tl Fairchild 2N 5137 t1 Q6 RCA 2N 4037 |l Q7 Fairchild 2N 5138 tl tl Q8 RCJ\ 2N 2LA2 Qe tl t, tl 2N 4037 tl il Q10 il 2N 2LQ2