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STD Leach Amp 700W

License: Public Domain

Mode: Editors' pick

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Update time: 2023-02-04 17:20:39
Creation time: 2020-09-14 08:26:23
Description
Here's a Leach Amplifier based on 2SC5200 and 2SA1943 output power transistors that can provide up to 700W of power.
Design Drawing
schematic diagram
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PCB
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ID Name Designator Footprint Quantity
1 1uF C1 CAP-TH_L5.1-W3.8-P5.08-D1.2 1
2 390pF C2 CAP-TH_L4.9-W3.7-P5.08-D0.5 1
3 100nF C3,C4,C9,C12,C20,C21,C22,C23 CAP-TH_L4.8-W3.2-P5.08-D0.5 8
4 100uF C5,C6,C7,C8,C18,C19,C25,C26 CAP-TH_BD10.0-P5.00-D1.0-FD 8
5 10pF C10,C11,C16 CAP-TH_L4.2-W3.8-P5.08-D0.5 3
6 180pF C13 CAP-TH_L4.2-W3.8-P5.08-D0.5 1
7 47n C14,C15,C27,C28 CAP-TH_L4.8-W3.2-P5.08-D0.5 4
8 47pF C17 CAP-TH_L4.8-W3.2-P5.08-D0.5 1
9 100nF C24 CAP-TH_L7.2-W2.5-P5.00-D0.6 1
10 20V D1,D2,D3,D4 DO-41_BD2.4-L4.7-P8.70-D0.9-RD 4
11 1N4148 D5,D6,D7,D8,D11,D12 DO-35_BD2.0-L4.0-P8.00-D0.5-FD 6
12 BY399 D9,D10 DO-27-BD5.3-L9.0-P14.0-D1.3-R-RD 2
13 5x20 BLX-Atype Fuse holder XC-7 F1,F3 FUSE-TH_L22.6-W9.0 2
14 GND IN HDR-2X1/2.54 1
15 4uH+10 LR1 ZOBEL NETWORK COIL 1
16 BC546 Q1,Q2,Q5,Q7,Q10 TO-92-3_L4.9-W3.7-P1.27-L 5
17 BC556 Q3,Q4,Q6,Q8,Q11 TO-92-3_L5.1-W4.1-P1.27-L 5
18 MJE340 Q13 SOT-32_L7.6-W2.7-P2.15-L 1
19 MJE15032 Q14 TO-220-3_L10.0-W4.5-P2.54-L 1
20 MJE15033 Q15 TO-220-3_L10.0-W4.5-P2.54-L 1
21 2SA1943 Q16,Q19,Q20,Q22,Q24,Q27,Q29,Q31,Q32 TO-3PL_L20.0-W5.0-P5.45-L 9
22 2SC5200 Q17,Q18,Q21,Q23,Q25,Q26,Q28,Q30,Q33 TO-3PL_L20.0-W5.0-P5.45-L 9
23 BD139 Q34 TO-126_L7.5-W2.5-P2.3-B 1
24 MJE350 Q35 SOT-32_L7.6-W2.7-P2.15-L 1
25 22K R1,R30 RES-TH_BD2.2-L6.5-P10.50-D0.6 2
26 2.2K R2 RES-TH_BD2.2-L6.5-P10.50-D0.6 1
27 300 R3,R4,R5,R6,R7,R8,R9,R10 RES-TH_BD2.2-L6.5-P10.50-D0.6 8
28 12K R11,R12,R24,R25 RES-TH_BD2.2-L6.5-P10.50-D0.6 4
29 10 R13,R38,R41,R42,R45,R46,R49,R50,R53,R54,R57,R58,R61,R62,R65,R66,R69 RES-TH_BD2.2-L6.5-P10.50-D0.6 17
30 1.2K R14,R15,R23 RES-TH_BD2.2-L6.5-P10.50-D0.6 3
31 2.2K R16,R17 RES-TH_BD4.5-L11.5-P15.50-D0.7 2
32 620 R18 RES-TH_BD2.2-L6.5-P10.50-D0.6 1
33 390 R19,R20 RES-TH_BD2.2-L6.5-P10.50-D0.6 2
34 33 R21,R22 RES-TH_BD2.2-L6.5-P10.50-D0.6 2
35 6.2K R26 RES-TH_BD2.2-L6.5-P10.50-D0.6 1
36 2K R27 RES-ADJ_3296W 1
37 5.6K R28,R29 RES-TH_BD2.2-L6.5-P10.50-D0.6 2
38 330 R31,R32 RES-TH_BD2.2-L6.5-P10.50-D0.6 2
39 220 R33 RES-TH_BD4.5-L11.5-P15.50-D0.7 1
40 100 R34,R35 RES-TH_BD2.2-L6.5-P10.50-D0.6 2
41 82 R36,R37 RES-TH_BD2.2-L6.5-P10.50-D0.6 2
42 0.5 R39,R40,R43,R44,R47,R48,R51,R52,R55,R56,R59,R60,R63,R64,R67,R68 RES-TH_L13.0-W9.5-P4.50-D1.0 16
43 22 R71,R72 RES-TH_BD4.5-L11.5-P15.50-D0.7 2
44 270 R73,R74 RES-TH_BD2.2-L6.5-P10.50-D0.6 2
45 +80V U1 1287-2P_L7.9-W8.1-P5.08 1
46 -80V U2 1287-2P_L7.9-W8.1-P5.08 1
47 OUT U3 1287-2P_L7.9-W8.1-P5.08 1
48 GND U4,U5 1287-2P_L7.9-W8.1-P5.08 2
49 Heatsink to220 01 U6,U7 HEATSINK 2

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