U87DC_04_TEST

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STD U87DC_04_TEST

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License: Public Domain

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Editors' pick

Cloned from U87DC_03

Update time： 2023-02-09 16:55:24

Creation time： 2021-05-10 22:59:41

Description

U87AI type microphone circuit. Using the FET amplifier from the U87i vintage circuit and the DC-DC 60v supply from the Schoeps CMC5 circuit to provide 60v capsule bias voltage for higher output. Multi-pattern capable.

Design Drawing

schematic diagram

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U87DC_04_TEST
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BOM

BOM download Purchase Parts

ID	Name	Designator	Footprint	Quantity
1	C6/C9-On/Off	C6/C9-ON/OFF	SAMTEC BSW-6P FLIPPED	1
2	1G	R3	1XHDR-RESISTOR	1
3	300k	R2	0.25W-AXIAL	1
4	1M	R4,R1	0.25W-RADIAL	2
5	220uf	C010	NICHICON_MUSE_UFG1H220MEM_22UF_50V	1
6	0.47uf	C9	CAP-TH_P7.5MM	1
7	330nf/63v	C12,C13	CAP-TH_L7.2-W3.5-P5.00-D0.5	2
8	0.1uf	C5	CAP-TH_L7.2-W3.5-P5.00-D0.5	1
9	27pf	C09	CAP-MLCC_L5.0-W2.5-P5.08-D0.7	1
10	0.01uf	C05,C04	CAP-L7.2_W2.5_LS5.0	2
11	1nf	C07,C06	CAP-L7.2_W2.5_LS5.0	2
12	10pf	C08	CAP-MLCC_L5.0-W2.5-P5.08-D0.7	1
13	0.1uf	C011,C02,C03	CAP-L7.2_W2.5_LS5.0	3
14	1N4148	D04,D03,D01,D02	SMALL-DO-35	4
15	G1	G1	MILL-MAX-FEM-0362-0-15-XX-23	1
16	G2	G2	MILL-MAX-FEM-0362-0-15-XX-23	1
17	G3	G3	MILL-MAX-FEM-0362-0-15-XX-23	1
18	G4	G4	MILL-MAX-FEM-0362-0-15-XX-23	1
19	470pf	C4,C01	CAP AXIAL 13-5	2
20	Grip	GRIP	HDR-M-2.54_1X6	1
21	47uH	L2,L1	0.25W-AXIAL	2
22	Inj	INJ	HDR-M-2.54_1X1	1
23	CAL	R13	POTENTIOMETER_TRIMMER_BOURNS_3296W	1
24	50K	OSC-TRIM	POTENTIOMETER_TRIMMER_BOURNS_3296W	1
25	4.7uf/35	C10	CP_RADIAL_TANTAL_D4.5MM_P2.50MM	1
26	22uf/6	C8	CP_RADIAL_TANTAL_D4.5MM_P2.50MM	1
27	2N3819	Q1	TO-92FOOTPRINT	1
28	Ohm	OHM1	HDR-1X1/2.54	1
29	RT	RT	HDR-1X1/2.54	1
30	SW	SW	HDR-1X1/2.54	1
31	6.8K	R5	0.25W-RADIAL	1
32	560R	R6	0.25W-RADIAL	1
33	47K	R7	0.25W-RADIAL	1
34	8.2k	R9	0.25W-RADIAL	1
35	2.2K	R11,R12	0.25W-AXIAL	2
36	10K	R8	0.25W-RADIAL	1
37	2.2k	R10	0.25W-RADIAL	1
38	750k	R03	0.25W-RADIAL	1
39	1G	R01,R02	0.25W-RADIAL	2
40	2n5551	T01	TO-92 2N5551	1
41	B-in 1 2 3	BIN-GND-HOT-CLD1	SAMTEC BSW-4P	1
42	68uH	L01	0.25W-AXIAL	1
43	150uH	L02	0.25W-AXIAL	1
44	Zener 33v	Z33V	DO-41-2	1
45	1uf	C7	CAP AXIAL POL 15-5	1
46	1:FD 2:FBK 3:RD 4:RBK 5:GND 6:CRD 7:OMN 8:Fig8 9:HPF1 10:HPF2	TOTOP1	SAMTEC BSW-10P	1
47	160pf	C6	CAP AXIAL 13-5	1
48	P+\|P-\|S-\|S+\|Bout	P+\|P-\|S-\|S+\|BOUT1	SAMTEC BSW-5P FLIPPED	1
49	10uf/63	C11	CAP AXIAL POL 15-5	1