ClariTy 2x300W Class-T Amplifier, Part 2
building the amplifier board
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Materials
Gerber file
CAM/CAD data for the PCB referred to in this article is available as a Gerber file. Elektor GREEN and GOLD members can exclusively download these files for free as part of their membership. Gerber files allow a PCB to be produced on an appropriate device available locally, or through an online PCB manufacturing service.
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Component list
Resistors:
R6,R11,R27,R32 = 0Ohm 01, lead pitch 9mm, MPC75-E01 (H.O.D1 , Bürklin2)
R7,R9,R28,R30 = 5Ohm 6/1 W lead pitch 15mm (max.), PR01 BCComponents (Farnell # 337-584, 10+)
R12,R33 = 15Ohm 1W, PR01, BCComponents (Farnell # 337-638, 10+)
R13,R34 = 240Ohm
R14,R35 = 22Ohm 5W (vertical))
P1,P2 = 10kOhm preset
Capacitors:
C1,C14 = 3µ F3 50V, MKT, lead pitch 5mm or 7.5 mm
C4,C17 = 220pF 200 V, COG, lead pitch 5 mm, dipped radial multilayer ceramic, Multicomp (Farnell # 747-075, 1+)
C5,C18,C32,C33,C36,C37 = 100nF 250V, lead pitch 7.5mm or 10mm, w x l = 6 x 13 mm (max.), Wima MKS4 (Farnell # 148-888, 1+)
C6,C19 = 47µ F 160V radial, lead pitch 5mm, diameter 10mm (max.), 105ºC, Panasonic EEUED2C470 (Farnell # 83-6400, 1+)
C8,C21,C38 = 47µ F 25V radial
C9,C22 = 220nF 400V MKP, lead pitch 15mm, w x l = 8.5 x 18 mm (max.), Epcos B32652-A4224-J (Farnell # 400-3755, 1+)
C10,C23 = 100nF 400V MKP, lead pitch 15mm, w x l = 7 x 18 mm (max.), Epcos B32652-A4104-J (Farnell # 400-3731, 1+)
C30,C31,C34,C35 = 470µ F 63V radial, lead pitch 5mm, diameter 13 mm (max.), 105ºC, Nichicon UPM1J471MHH (Farnell # 415-3030, 5+)
Inductors:
L1,L2 = 11µ H3, 29 turns 1.5 mm ECW (SWG 16) on T106-2 core (Micrometals) (core supplied with pre-fitted PCB)
Semiconductors:
D1-D4,D8-D11 = MUR120 1 A/200 V ultra fast, ON Semiconductor (Farnell # 930-994, 1+)
D15 = LED, red, high efficiency
T1-T4 = STW38NB20, TO-247 case, 200 V/38 A, ST (Farnell # 323-9408, 1+)
IC1 = TA3020, Tripath3
IC2 = CNY17-2
Miscellaneous:
JP1,JP2 = 3-way pinheader with jumper
K1-K4,K6-K9 = spade terminal, vertical, PCB mount
K5 = 2-way PCB terminal block, lead pitch 5 mm
K10 = 2-way pinheader
48-pin IC socket, DIP socket with turned pins
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