Audio Line High-End Preamplifier with ICs

Audio Line High-End Preamplifier with ICs

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�� Modular �� . �� : �� . �� , �� [Volume]. �� Tape Monitor, �� , �� 3 �� . �� LINE, �� . �� . � �� .

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�� Fig.1A �� . �� . �� , �� . �� . �� . �� . �� . �� , �� DC �� [�� TR1-6]. �� IC1-2. �� . �� , �� [TR1 �� TR6]. � �� [Offset voltage] �� [200uV]. �� , �� SF1-4, �� . �� . �� . �� . �� Table 1 �� . � �� , �� , �� [��], �� . �� IC5-6 �� TR5-6 �� . �� RV1[VOLUME] �� . �� IC3-4. �� . �� R15-18=15Kohm �� R16-20=2.2Kohm �� 17dB [X7.5]. �� , �� A=R14+R15+R16/R16. �� R14-18 �� . �� , �� . �� RL6 �� C13 �� IC7a-b [Fig.1A], �� . �� IC5-6 �� , �� J11-12.

Table 1
NE5534	+V
OPA604	-V
OPA627	+V
OPA637	+V

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� �� . �� , �� NE5534. � �� OPA604, OPA627 �� OPA637 �� Burr-Brown �� . � OPA637 �� 4, �� IC1-2-5-6 �� 1. � �� OPA604 �� . �� FET �� . �� , �� , �� , �� 600�.

	Part List Main Preamp. [Fig.1A]
R1.....R10=47K ohms	TR1.....TR6=100K ohms Multiturn Trimmer	SF1......SF4=Jumper Switch [See Text]
R11-12-21-23=1M ohms	RV1=2X10K ohms Log. Pot. [ALPS-NOBLE]	J1.....J14=RCA Type Female gold-plated plug
R13-17=470K ohms	C1......C12=100nF 100V MKP 5%
R14-18-22-24=100 ohms	IC1-2=OPA604-OPA627-NE5534 [See Text]
R15-19=12K ohms [See Text]	IC3-4=OPA604-OPA627-OPA637-NE5534 [See Text]	All Registors is 1/4W 1% Metal film
R16-20=1.8K ohms	IC5-6=OPA604-OPA627-NE5534 [See Text]	For ICs Techical Data see my Database

Input Selector and Delay Time [Fig.1B]

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�� [Fig.1B]

�� S1, �� [Tape monitor] �� S2, �� [MUTE] �� S3 �� IC7A-B. �� S1� �� +12V [+VD], �� . �� Led D1..D4, �� . �� Tape monitor. �� , � +VDD �� IC7A � �� High, �� R28 �� C13, �� 5 �� IC7B �� High, �� Q1 �� RL6 ��. �� C13 �� . �� MUTE �� S3 �� . �� S3 �� . �� MUTE � �� RL6 �� . �� D7, �� MUTE. �� S3 � �� RL6 ��, �� . �� S1 �� +12V �� S3. �� RL6 �� +12V. �� , �� .

Part List Sel. and Delay [Fig.1B]

R28=1M ohms	C14=100nF 100V MKT 5%	RL1.....RL6=Relay 12V [See Text]
R25-26-30=1K ohms	IC7=4081 c-mos	S1=6 stepX2 contact Rotary Switch [See Text]
R27=10K ohms	D1.....D5-7=Red Led 3mm	S2-3=1X2 step mini switch
R29=39K ohms	D6=1N4148	All Registors is 1/4W 1% Metal film
C13=4.7uF 25V	Q1=BD678	For ICs Techical Data see my Database

Power Supply [Fig.2]

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�� , �� . �� JF1 �� . �� , �� . �� . �� , �� . �� . � �� . �� . � �� IC6 �� +12V. �� . � �� C31-32 �� , �� RL6 �� . �� . � �� Zener D17 �� R11 �� +12V �� IC7. O �� 1 �� . �� , �� , �� , ��.

Part List For Power Supply [Fig.2]

R1-6-7-10=170 ohms	C27=470uF 25V	TR1.....TR4=10K ohms Multiturn Trimmer
R2-4=3.3K ohms	C30-32=4.7uF 25V	T1=230Vac @2X22V 50VA //12V 5VA
R3-5-8-9=15K ohms	C31=47uF 40V	S1=2step 2contact Switch [230Vac 3A]
R11=2.2K ohms 1W	B1=Bridge Rectifier 80V-3A	F1=1A Slo Blo Fuse
C1....C4=22nF 100V MKT	B2=4 Diodes 1N4002	JF1=3pin male supply jack with EMI Filter
C5.....C8=4700uF 63V	D1.....D6=1N4002
C9-10=1uF 100V MKT	D7=12V 0.4W Zener
C11-12-15-16-19-20-28-29=100nF 100V	IC1-2=LM317T [On Small Heatsink]	All Registors is 1/4W 1% Metal film
C13-14-21-22-25-26=10uF 25V	IC3-4=LM337T [On Small Heatsink]	For ICs Techical Data see my Database
C-17-18=100uF 40V	IC5=LM7812 [On Small Heatsink]

Audio Line High-End Preamplifier with 5 Line Inputs

Audio Line High-End Preamplifier with ICs [In English]

Sam Electronic Circuits 3/04

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