Q-Watt audio energy amplifier | Elektor Journal

Component list

COMPONENT LIST
Resistances
(5%, 0.25 W, unless otherwise stated)
R1, R3 = 390 ohms
R2, R4, R17, R18, R22, R23, R30 = 15 kOhm
R5 = 8.2 kOhm
R6, R20, R28 = 1.2 kOhm
R7 = 220 ohms
R8, R9 = 100 ohms
R10, R11 = 0.2 Ohm 1% 5 W, low inductance (Vishay Dale LVR05R2000FE73)
R12, R13 = 3.9 ohms 5% 5W
R14 = 220 kOhm
R15, R16 = 10 MOhm
R19 = 27 kOhm
R21 = 470 kOhm
R24 = 1 MOhm
R25, R26 = 820 kOhm
R27 = 68 kOhm
R29 = 1 kOhm
P1 = 470 Ohm trimpot, horizontal
Capacitors
C1 = 4.7 F 63 V, MKT (metal / polyester), 5 mm or 7.5 mm spacing
C2 = 1 nF / 400 V, MKT (metal / polyester), 5 mm or 7.5 mm distance
C3 = 18pF 500V (replacement for the original trimmer 5-57pF 250V)
C4, C6, C7 = 100 nF 100 V, 5 mm or 7.5 mm spacing
C5 = 47 nF 400 V, 5 mm or 7.5 mm distance
C8, C9 = 4700 uF 100 V, 10 mm distance, snap-in, 30 mm diameter. (Panasonic ECOS2AP472DA)
C10 = 2.2 µF 63 V, 5 mm or 7.5 mm distance
C11 = 33 nF 63 V, 5 mm or 7.5 mm spacing
C12, C13, C16 = 10uF 100V, 2.5mm pitch, 6.3mm diameter.
C14 = 1 uF 250 V, 2.5 mm spacing, 6.3 mm diameter.
C15 = 220 uF 16 V bipolar, 5 mm spacing, 10 mm diameter
Inductor
L1 = 450 nH: 13 turns of 14AWG (1.5 mm) enamelled copper wire, 7 mm inner diameter
semiconductor
D1, D2 = 15 V 0.5 W Zener diode
D3, D4 = 1N4004
D5 = 1N4148
D6 = LED, red, 3 mm
T1 = BD139
T2 = MJE15032
T3 = MJE15033
T4 = MG6330-R
T5 = MG9410-R
T6 – T10 = 2N5550
IC1 = LME49811TB / NOPB
IC2 = OPA177GPG4
IC3 = 4N25
various
K1 = 2-pin pin header, 0.1 ” spacing
K2 – K6 = Faston connector (blade), PCB holder, 0.2 ” spacing
K7 = 3-way PCB screw terminal block, 5 mm spacing
RE1 = relay, PCB holder, SPCO, 16 A, 48 V coil, 5.52 kOhm (TE Connectivity / Schrack type RT314048)
TO-220 insulating washer for T1, T2, T3, Kapton MT film, 0.15 mm, 6 kV
TO-3P insulating washer for T4, T5, Kapton MT film, 0.15 mm, 6 kV
TO-220 3 mm insulating socket for T2, T3
Heat sink, 0.7 K / W (e.g. Fischer type SK 47/100 SA)
Heat sink for IC1, dim. 25x 80 mm, 2 mm thick aluminum
PCB # 110656-1, see www.elektor.com/110656
Power supply (for an amplifier)
Power transformer: sec. 2x40V, 500VA (e.g. Nuvotem 0500P1-2-040 for 230 VAC network)
Bridge rectifier: 200 V, 35 A (e.g. GBPC3502) (Fairchild)
Four 100V 10,000 ° F Electrolytic Capacitors (2 in parallel on each supply rail)

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