High Voltage Supply
or the Valved RIAA Preamplifier and other applications330 V from 12 V
Materials
Gerber file
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Component list
Resistors:
R1 = 1.2 k-ohm
R2 = 6.8 k-ohm
Capacitors:
C1 = 10µ F 63V radial
C2,C3 = 100nF
C4,C5,C6 = 2200µ F 25V radial
C7-C10 = 47n F ceramic
Semiconductors:
D1 = 1N4148
D2 = red high-efficiency LED
D3-D6 = FR606 (or similar 6A diode)
IC1 = KA78T12 (3A)
Miscellaneous:
K1,K2,K3 = 2-way PCB terminal block, lead pitch 5mm
For IC1: heatsink type SK129 63,5 STS, 3.5 K/W (Fischer) (Dau Components)
Isolation material for IC1
PCB, order code 000186-2
330-V converter
Resistors:
R1,R2 = 120 k-ohm
R3 = 4.7 k-ohm
R4 = 470 k-ohm
R5 = 1 k-ohm
R6 = 15 k-ohm
R7 = 6.8 k-ohm
R8,R9 = 680 k-ohm
R10 = 330 k-ohm
R11,R12,R13 = 2.2 ohm
R14 = 100 ohm
R15,R16 = 82 k-ohm
P1 = 100 k-ohm preset H
P2 = 10 k-ohm preset H
Capacitors:
C1 = 1nF ceramic, lead pitch 5mm
C2,C9 = 10nF ceramic, lead pitch 5mm
C3,C7,C10 = 100nF ceramic, lead pitch 5mm
C4 = 1nF MKT, lead pitch 5mm
C5,C6 = 100µF 16V radial
C8 = 100µF 25 V radial
C11 = 220µF 25V radial
C12 = 4nF7
C13,C14,C15 = 2µF2 450V radial, lead pitch 5mm, diameter 10mm
C16,C17,C18 = 1000µF 25V radial
Inductors:
L1 = suppressor coil 40µH 3A, type SFT10-30 (TDK)
L2,L3 = 47mH, e.g., 2200R series type 22R476 (Newport Components)
Semiconductors:
D1-D4 = BY329-1000 (Philips)
D5 = BAT85
T1 = BC550C
T2,T3 = BUZ11
IC1 = SG3525A(N) (ST Microelectronics)
Miscellaneous:
K1 = 2-way PCB terminal block, lead pitch 5mm
K2,K3 = 2-way PCB terminal block, lead pitch 7.5mm
F1 = fuse 2AT (time lag) with PCB mount holder
TR1 = ETD29 (Block)
primary: 2 windings 11 x (3 x 0.5 mm parallel) ecw
secondary: 1 winding 300 x 0.3 mm ecw
PCB, order code 000186-1
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