MIXER 6+ channel

Audio Modular MIXER with 6 and up input Channel

�� AUDIO MIXER, �� . �� , �� . �� MODULE �� , �� MIXER, �� , �� . �� . �� , �� . �� . �� project , �� .

MIXER_1.gif (29758 bytes)

�� Fig. 1 �� MIXER. �� 6 �� . �� CH 1-4 �� . �� , �� BALANCE � UNBALANCE [�� ], �� POWER PHANTOM, �� , �� . �� CH 5-6, �� stereo ��. � �� , �� stereo ��. �� . � �� RV1-6, �� . �� RV7-12 �� [Panoramic Potesometer [BALANCE ]]. �� [IC1a-b], �� . �� TR1-2 �� , �� . �� . �� [Fig. 9], �� . �� IC3a-b, �� MIXER, �� , �� . �� , �� , �� C2a-b, �� JF13. �� , �� STEREO VUMETER. �� . � �� JF12b �� .

VU Meter collection [1][2][3]

Part List [Fig.1]

R1.....12=4.7Kohms	RV1....4=47Kohms Log. [Fader]	C19-20=220uF 25V
R13.....24=10Kohms	RV5-6-13=2X47Kohms Log. [Fader]	Q1-3=BD139
R25-26=22Kohms	RV7....12=10Kohms Lin. pot. Log.	Q2-4=BD140
R27-30-34-39=100ohms	TR1-2=4.7Kohms trimmer	IC1-3=NE5532
R28-29-36-37=100Kohms	C1....8=10uF 25V	IC2=NE5532 - TL072
R31-42=10Kohms	C9-11=47pF ceramic or mylar	JF1....6=XLR Female Plug
R32-41=4.7Kohms	C10-12=47uF 25V	JF7....11= RCA Female Plug
R33-40=10Kohms	C13-14=100uF 25V	JF13=JACK Female Plug
R35-38=47ohms	C15-16=2.2uF 16V [C17-22=No use]
All the Resistors is 1/4W 1% metal film	C18-21=100pF ceramic or mylar

Modules for mono Input Channels

MIXER_2.gif (6496 bytes)

�� Fig 2 ,�� [unbalance] �� . �� [IC1], �� , �� [��] �� [��]. �� S1 ��, �� . �� IC1 �� . O �� , �� , �� , �� . � �� : IC1=NE5534 - NE5532 - LM833- TL072- TL074.

Electronic Balance Mic-Line input Module

MIXER_3.gif (10099 bytes)

�� Fig. 3, �� , �� [Balance], �� 22��. �� , �� . �� IC1-3. � �� , �� . �� : IC1-2=NE5532 - LM833, IC3=NE5534 - TL071.

Microphone transistors preamplifiers

MIXER_4_5.gif (9022 bytes)

�� Fig. 4-5, �� , �� [unbalance] �� . �� , �� . � �� zener , � ��, �� , �� .

Mic/Line Balance input Professional

Modules for Stereo Input Channels

MIXER_6_7.gif (14033 bytes)

�� modules �� stereo �� , �� , �� Fig. 6-7. � �� Fig. 6, �� [balance] �� , �� Fig. 7, �� [unbalance] ��. �� . �� , �� , �� 33pF. �� .

Stereo Phono Preamplifier [RIAA Filter]

MIXER_8.gif (11090 bytes)

�� Fig. 8, �� PHONO �� RIAA, �� . �� , �� RIAA, �� , �� 1% metal film, �� polypropylene �� Mylar. � �� C8, �� , �� , �� . �� IC1 �� LM833 � �� .

3 Band EQ

MIXER_9.gif (12126 bytes)

�� Fig. 9, �� , �� , �� , �� , �� [�18 dB/Oct]. �� , �� .

Power Supply for 6 Ch MIXER

MIXER_10.gif (11974 bytes)

�� Fig. 10 , �� MIXER, �� . �� . � �� 15V. � �� +12V �� VUMETER. �� VUMETER ,�� . �� +5V, (�� [Fig. 4-5], �� zener). �� 6 �� . �� . �� 1 , �� .

MIXER_11.gif (4807 bytes)

�� Fig. 11, �� , �� . �� , �� , �� . � �� [+HOT] �� , �� [-GOLD] �� . �� .

Typical characteristics for IC's, that I propose

MIXER_12.gif (7710 bytes)

To ��R-6Ch, �� , �� . �� RV1-6, �� (Fader). �� , �� .

*�� ��5534, �� 22pF �� 5 �� 8 �� .

Pre Fader Listen [PFL] stage for Audio Mixer

MIXER_13.gif (16075 bytes)

Monitor Sel. From Mixer Input Channel To Headphone

MIXER_14.gif (8621 bytes)

�� MIXER �� monitor, �� -�� Fader � �� , �� . �� . �� Fig.13, �� , �� . �� LED D1-6, �� . �� . �� , �� . �� , �� L-R, �� . �� Fig.14, �� , �� . �� , �� . �� IC1, �� , �� .

Audio MIXER 6CH in Enqlish

Sam Electronic Circuits 1/02

[ Home ] [ My Database ] [My Guestbook ]