mini preamp with phono

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STD mini preamp with phono

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Update time： 2023-07-31 13:01:12

Creation time： 2020-09-28 14:46:38

Description

its small, has a phono stage and a powersupply match the jfets as best as u can. 0.1mA or lower if possible. balance pot is 100k linear volume pot is 100k logarithmic switch is 3 way 2 pole

Design Drawing

schematic diagram

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PSU
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phonostage
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Switch
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19Vmetaxasmodule
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PCB

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PCB_2020-09-28_22-10-47
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BOM

BOM download Purchase Parts

ID	Name	Designator	Footprint	Quantity
1	1000uF	C11,C12,C13,C14	CAP-TH_BD12.5-P5.00-D1.2-FD	4
2	CONN-TH_2P-P5.00	P1	CONN-TH_2P-P5.00	1
3	HLK-PM24	U9,U10	PWRM-TH_HLK-PM24	2
4	MC7815CTG	U5	TO-220-3_L10.0-W4.5-P2.54-T	1
5	22mH	L1	FILTER-TH_B82791H	1
6	MC7915CTG	U11	TO-220-3_L10.0-W4.5-P2.54-L	1
7	220uF	C15,C16	CAP-TH_BD8.0-P3.50-D1.0-FD	2
8	HDR-F-2.54_1x2	PHONO_IN(2R),OUT1(1R),IN1(2R),IN2(2R),OUT2(1R)	HDR-F-2.54_1X2	5
9	100K	R7,R9,R10,R12	R0805	4
10	180K	R5,R14	R0805	2
11	1uF	C5,C6	RES-TH_L4.0-W2.0-P2.54-D0.7	2
12	22uF	C1,C3,C8,C10,C17,C18	CAP-SMD_L7.3-W4.3-R-RD	6
13	100nF	C4,C7	CAP-TH_L7.2-W2.5-P5.00-D0.5	2
14	2.7K	R6,R13	R0805	2
15	10K	R4,R15,R21,R22,R23,R24,R25,R26	R0805	8
16	22nF	C2,C9	CAP-TH_L7.2-W2.5-P5.00-D0.5	2
17	47K	R1,R18	R0805	2
18	4.7K	R3,R16	R0805	2
19	2.2K	R2,R17,R31,R41	R0805	4
20	750	R8,R11	R0805	2
21	LM4562MAX/NOPB	U1,U2,U3,U4	SO-8_L5.2-W4.4-P1.27-LS7.0-BL	4
22	1M	R49,R50,R32,R48	R0805	4
23	HDR-F-2.54_2x4	H6	HDR-F-2.54_2X4	1
24	RK09L12B	R19,R20	POTENTIOMETER_ALPS_RK09L_DOUBLE_VERTICAL	2
25	2N2219A	T5,T11	TO39	2
26	J112	T2,T1,T9,T10	TO-92-3_L4.8-W3.7-P2.54-L	4
27	2N4401	Q2,Q4	TO-92-3_L4.8-W3.7-P2.54-L	2
28	270	R27,R28,R43,R44	R0805	4
29	2N4403	Q1,Q3	TO-92-3_L4.8-W3.7-P2.54-L	2
30	22	R33,R37,R38,R39	R0805	4
31	30K	R34,R40	R0805	2
32	LED-TH-5mm_R	LED1,LED2	DO-41_BD2.4-L4.7-P8.70-D0.9-FD	2
33	470	R29,R30,R45,R46	R0805	4
34	240	R36,R42	R0805	2
35	2N2905A	T6,T12	TO39	2
36	100	R35,R47	R0805	2
37	J175	T4,T3,T7,T8	TO-92-3_L4.8-W3.7-P2.54-L	4