Leach Amp 700W

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STD Leach Amp 700W

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License: Public Domain

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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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BOM

BOM download Purchase Parts

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