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STD 12SN7 preamp
Mode: Editors' pick
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Update time：
2019-12-31 06:16:18
Creation time：
2016-03-25 02:22:02
Description
12SN7 based preamp
Design Drawing
schematic diagram
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New Schematic 2
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transformer plus other updates
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| ID | Name | Designator | Footprint | Quantity |
|---|---|---|---|---|
| 1 | INPUT | P1,P6 | HDR1X1 | 2 |
| 2 | 100k | R1,R30 | TRIM_POT_PTH | 2 |
| 3 | 1k | R2,R10 | R3 | 2 |
| 4 | 12SN7GT | T1,T3 | NONE | 2 |
| 5 | 3.3k | R3,R4 | R3 | 2 |
| 6 | 52k | R5,R31 | R3 | 2 |
| 7 | 68k | R6,R7 | R3 | 2 |
| 8 | 4.7k | R8,R9,R22,R23 | R3 | 4 |
| 9 | 0.68u | C1,C2,C9,C14,C22 | C1 | 5 |
| 10 | 1u | C3 | C1 | 1 |
| 11 | OUTPUT | P2 | HDR1X1 | 1 |
| 12 | GBJ15005 | B1,B2 | NONE | 2 |
| 13 | 120u | C4,C5,C6,C7,C10,C11 | CP_8X13MM | 6 |
| 14 | 560 | R11,R12 | R3 | 2 |
| 15 | 47k | R13 | R3 | 1 |
| 16 | 220k | R14 | R3 | 1 |
| 17 | XFMR | T2 | NONE | 1 |
| 18 | XFMR_TAP | T5 | NONE | 1 |
| 19 | 1000u | C8 | CP_8X13MM | 1 |
| 20 | 1N4001 | D1,D2 | DO35-7 | 2 |
| 21 | 1.8u | C2,C3,C9,C21 | C1 | 4 |
| 22 | mids and high out | P2,P5 | HDR1X1 | 2 |
| 23 | Mutual_Inductor2 | AS-05T200_B+_TAPS | NONE | 1 |
| 24 | TRANSFORMER_2 | AS-05T200_6.3_TAPS | NONE | 1 |
| 25 | woofer out | P3,P4 | HDR1X1 | 2 |
| 26 | 560u | C4,C5,C6 | CP_8X13MM | 3 |
| 27 | 1.6K | R11,R12 | R3 | 2 |
| 28 | 1.0u | C3,C15 | C1 | 2 |
| 29 | NO | D1 | DO35-7 | 1 |
| 30 | CL80 | R15 | NONE | 1 |
| 31 | 200 | R21,R29 | R3 | 2 |
| 32 | 6.8k | R24,R25 | R3 | 2 |
| 33 | 330 | R27,R28 | R3 | 2 |
| 34 | 1M | R16,R17 | R3 | 2 |
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