Transcript
Universal Power Supply DIY KIT for Mic Preamplifiers (+12-37v, -12-37v, +48v)
This DIY kit provides a universal power supply for the mic preamp (and other devices) that require bipolar power in the voltage range from 12 to 37 volts, and from 48 to 60 volts for phantom power. The required voltage is adjusted with trimmer potentiometers. DIY Kit includes: PCB – 1pc, LM317 – 3pcs, LM337 – 2pcs, UF4007 (1N4007) – 18pcs, 5k trim – 5pcs, Capacitors: 1000u/50v – 10pcs, 10u/63v – 10pcs, 0.1u (ceramic) – 1pc, Resistors: 120R – 5pcs, 22k – 2pcs, 10R – 1pc, 47R (51R) 1W – 1pc Sockets: 3 pin socket – 3pcs, 3 pin (jamper) – 1pcs, Jamper – 1pc. Bonus: Stands for PCB and toroid transformer mount (no screws!).
First. Soldering diodes. Pay attention to how the diodes are oriented.
Now solder resistors. Two resistors 22k (R1, R2) are on the pic below.
Next picture – 10R resistor.
Next – solder 5pcs 120R (R4,R6,R8,R10,R12).
As we soldered components adjacent to the board, let’s solder “higher” components. Place to the board 5 trimmers (4k7) – R3, R5,R7,R9,R11.
Push resistors legs aside to fix them on board. Solder.
Next goes 47R(51R) 1W – R13.
Solder ceramic capacitor С22 – 0.1u (100n).
Solder 10 electrolytic caps 10u/63v (C11,C12,C14,C18,C13,C17,C16,C20,C15,C19). Pay attention to how the capacitors are oriented – negative is marked with white line.
Now solder ICs – LM337 (IC4, IC5).
And LM317 (IC1,IC2,IC3).
Now all connectors. Combine two sockets - notch and comb can get one of the two connectors into a single 6-pin.
And one is on the other side.
Solder 10 electrolytic caps 1000u/50v (C1,C2,C3,C4,C5,C8,C7,C9,C6,C10). Pay attention to how the capacitors are oriented – negative is marked with white line.
It remains to add a jumper connector, which allows us to obtain the necessary voltage for phantom power supply (+48 V). If we use a transformer with a secondary winding 15 to 18 volts - the jumper is set to T (tripler). If we have more voltage on the secondary windings of the transformer (22-28 volts) - put a jumper in position D (doubler).
The scheme of the power supply and the example of interconnection for dual mic preamps are shown in the following pages.
0V
C21
CASE
+4 8
+ V 1 +V 2 - V 1 1n4007
C10
www.diyfactory.ru
D18
C7
C9
1n4007
1n4007
1n4007
1n4007
C6
D8
D7
D3
C5 1n4007
1n4007
C8
D1
D2
1n4007 1n4007
C2
R1 AC 0V AC In
C1
AC
C3 R2
C4
D6
D5
D4
R14
-V2
R11 1n4007
R9
1n4007
1n4007
R7
1n4007
R5 R3
R13
R12
D17 D16
R10
D15
1n4007 1n4007
1n4007
1n4007
1n4007
D
D14
R8
D13 D12
R6
D11 D9
R4
D10
~15-34v
T
~15-34v
C20 C18 C16 C14 C12
C19 C17 C15 C13 C11
lm337 VT5 lm337 VT4 lm317 VT3 lm317 VT2 lm317 VT1
mic pre mic pre
Universal PSU two mic preamp connection +48v -12-37v 0v (ground) +12-37v
~110v/220v
1
2
3
4
5
6
7
8
D10 LM317
A
A
47R/1W IN
R13
D9 +
R4
120R
+
22k
IC1
C11
C3 1000u/50v
C12
2
10u/63v R3 1 5k
22k
R1
B
+
3
10u/63v +
D5 D8
R2
D6 D7
+48v
ADJ
C4 1000u/50v
4x1n4007
OUT
B
Double +V (12-37v)
D12 D14
D13 +
R8
C C15
3
10u/63v
C6
+
2
C16 10u/63v
1
R7 5k
+
1000u/50v +
C7
IC3
+
3
10R
C20
2
R11 5k
R14
10u/63v
GND
OUT
IN
IC5
R12
D17
+
1
+
C10 1000u/50v
C9
Case
D
C19 10u/63v
120R
IC4
120R
D15 IN
R10
GND
+
C17
1000u/50v
10u/63v 10u/63v
10u/63v
C13
ADJ
+V (12-37v)
0v
+
+ +
C18
2
+
3 3
C8
C14 10u/63v
1
R5 5k
+
2
1
D
C5
R9 5k
220:15v+15v/30vA
+
1000u/50v
1000u/50v
5
D4
4
D3
7 6
S1
PRI
S2
8
D1
TR1
1
D2
R6
ADJ
OUT
120R
IN
IC2
1000u/50v
OUT
D11
IN
4x1n4007
C
LM317
LM317
120R
+
C2 1000u/50v
1000u/50v
+
Triple C1
C22 0.1u -V (12-37v)
OUT
LM337 LM337 D18 D16
E
E -V (12-37v)
1
2
3
4
5
6
7
8
