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revised schematic (c)copyright 1994-2004

1
The power supply components for this amplifier are as follows and are expressed for Two Channels. 1 x Toroidal Transformer with a Core rating of 625VA. Primary windings are made to suit your local mains supply. Eg: for Australia One single primary winding with a 240VAC rating. For USA, 110VAC, 115VAC and I believe there is a 220-Volt AC mains supply in some areas of the United States. For the UK it would be 220 VAC to 240 VAC. The secondary windings are as follows. 2 x 50 volts AC at full load. One 400 Volt 35 Ampere, bridge rectifier. 2 x 4.7K 5 Watt ceramic resistors Minimum filter capacitor requirements would be 2 x 10,000uf 100 volt electrolytic. Ideal capacity would be 40,000uf per voltage rail. A suggested power supply schematic is shown below with the schematic of The amplifier. 1 2 3 4 5 6 7 8 A B C D 8 7 6 5 4 3 2 1 D C B A Title Number Revision Size A2 Date: 17-Feb-2004 Sheet of File: E:\Protel Projects\..\MOSAMP8.S01.sch Drawn By: C1 100uf R34 82 ohm C5 100uF 100v C10 100uF 100v F2 5 AMP F1 5 AMP R23 470 R21 470 R22 470 R20 470 R28 0.22 Ohm R30 0.22 Ohm R31 0.22 Ohm R29 0.22 Ohm Q18 IRFP9240 Q16 IRFP9240 Q17 IRFP240 Q15 IRFP240 R11 15k C7 10pf C9 100uf C8 100uf C6 1.0nF Q5 BC546 Q4 BC546 ZD2 15v Q1 MJE340 C13 330uF R18 470 R19 470 R6 18K Q14 IRFP9240 Q13 IRFP240 Q9 MJE340 C4 10pF R10 470 C3 10nf C2 2.2UF R1 15k R2 1K R16 470 R17 470 Q11 IRFP240 Q12 IRFP9240 R14 6k8 R13 100 R12 100 R3 2k2 R5 2k2 R15 100 Q8 MJE350 Q6 MJE350 Q3 BC546 Q2 BC546 RCA1 Q7 MJE340 C11 18pf R4 10k ZD1 15v Q10 BD139 C12 .47 R25 0.22 Ohm R27 0.22 Ohm R26 0.22 Ohm R24 0.22 Ohm R8 10K R7 10k R9 10 Ohm P1 5k D1 1N4004 R32 100 Ohm R33 100 Ohm D2 1N4004 R35 47 Ohm R36 47 Ohm R37 1k R38 4k7 C14 470nf MKT C15 10nf C16 100nf R44 330k R40 82k R41 1k R43 100k R45 5k6 R42 1m Q19 BC546 Q20 BC556 LD1 Anthony.E.Holton Revised Schematic -70 VOLTS +70 VOLTS (C)Copyright 1994-2004 LAST REV.17/02/2004 ZD3 1N4737 or 9.1 to 15v ZD4 1N4737 or 9.1 to 15v T1 625VA 2x50 VAC secondary windings BR1 600V/35 AMP E2 10,000uf 100v E1 10,000uf 100V E4 10,000uf 100V E3 10,000uf 100V SW1a SW1b Active 240VAC/115VAC Neutral Chassis Ground +70 Volts -70 Volts Suggested Power Supply PDF created with pdfFactory Pro trial version www.pdffactory.com

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Page 1: Revised Schematic (c)Copyright 1994-2004

The power supply components for this amplifier are as follows and are expressed for TwoChannels.1 x Toroidal Transformer with a Core rating of 625VA. Primary windings are made to suit your local mains supply. Eg: for Australia One single primary winding with a 240VAC rating. For USA, 110VAC, 115VAC and I believe there is a 220-Volt AC mains supply in some areas of the United States. For the UK it would be 220 VAC to 240 VAC. The secondary windings are as follows.2 x 50 volts AC at full load. One 400 Volt 35 Ampere, bridge rectifier. 2 x 4.7K 5 Watt ceramic resistors Minimum filter capacitor requirements would be 2 x 10,000uf 100 volt electrolytic. Ideal capacity would be 40,000uf per voltage rail.

A suggested power supply schematic is shown below with the schematic ofThe amplifier.

1 2 3 4 5 6 7 8

A

B

C

D

87654321

D

C

B

A

Title

Number RevisionSizeA2

Date: 17-Feb-2004 Sheet ofFile: E:\Protel Projects\..\MOSAMP8.S01.sch Drawn By:

C1100uf

R3482 ohm

C5100uF 100v

C10100uF 100v

F25 AMP

F15 AMP

R23470

R21470

R22470

R20470

R280.22 Ohm

R300.22 Ohm

R310.22 Ohm

R290.22 Ohm

Q18IRFP9240

Q16IRFP9240

Q17IRFP240

Q15IRFP240

R1115k

C710pf

C9100uf

C8100uf

C61.0nF

Q5BC546Q4

BC546

ZD215v

Q1MJE340

C13330uF

R18470

R19470

R618K

Q14IRFP9240

Q13IRFP240

Q9MJE340

C410pF

R10470

C310nf

C22.2UF

R115k

R21K

R16470

R17470

Q11IRFP240

Q12IRFP9240

R146k8

R13100

R12100

R32k2

R52k2

R15100

Q8MJE350Q6

MJE350

Q3BC546Q2

BC546RCA1

Q7MJE340

C1118pf

R410k

ZD115v

Q10BD139

C12.47

R250.22 Ohm

R270.22 Ohm

R260.22 Ohm

R240.22 Ohm

R810K

R710k

R910 Ohm

P15k

D11N4004

R32100 Ohm

R33100 Ohm

D21N4004

R3547 Ohm

R3647 Ohm

R371k

R384k7

C14470nf MKT

C1510nf

C16100nf

R44330k

R4082k

R411k

R43100k

R455k6

R421m

Q19BC546

Q20BC556

LD1

Anthony.E.Holton

Revised Schematic

-70 VOLTS

+70 VOLTS

(C)Copyright 1994-2004LAST REV.17/02/2004

ZD31N4737 or 9.1 to 15v

ZD41N4737 or 9.1 to 15v

T1

625VA 2x50 VAC secondary windings

BR1600V/35 AMP

E210,000uf 100v

E110,000uf 100V

E410,000uf 100V

E310,000uf 100V

SW1a

SW1b

Active 240VAC/115VAC

Neutral

Chassis Ground

+70 Volts

-70 Volts

Suggested Power Supply

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