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ARRL Handbook CD Template File

Title: 13.8-V, 40-A Power Supply Chapter: 11 Topic: A 13.8-V, 40-A Switching Power Supply Template contains: Parts placement diagram PC Board Etching Pattern
Note: Etching pattern may be slightly too large for US Letter size paper on your printer.

Schematic Diagram
Note: The schematic diagram is printed correctly in the 2000 ARRL Handbook. The schematic diagram is printed incorrectly in the 1999 ARRL Handbook; this is the corrected schematic.

D6 R10 C15

D7

D8 R11 C16

D9

D17

R19

L2

C17

C18
R15 R16

C19
R23
R14 C36

C20

C21

R16

R18

C32 R20
VR1

R17

R15

C35

AC IN

C33

C22
C37

R13 C1 D10 R12

C31 D11

U1

R21

R24

Q3 D13

C34

Q4 D14

L3 C23

D12 R22 10 VR2 R25 R26 R34

L1

T1

6

7

8

9

10

6

7

8

9

T2
5 4 3 2 1 5 4

T3
3 2 1

C24 13.8 V
R31
D18

C2

C13 NTC2 C3
R9

C12

VR3 R1 R2 C38 R3 R4 D3 Q1 R37 R38 Q5 R39 R35
R36

NTC1

R5 R6 R7 R8 D5

U3

+

D4

D2

R32 R27 R28 R29 R30 R33 + FAN

R K G

C10

+ C3

C11

C4

C5

C6

C7

C8

C9

D1

FB2

C14

U2

FB1

Q2

A 13.8-V, 40-A Switching Power Supply, Chapter 11