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STD Preamplificador a tubos de vacío con 12AX7

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Update time: 2024-03-22 16:17:16
Creation time: 2017-02-15 15:27:40
Description
Diagrama y PCB de un preamplificador de audio con tubos de vacío 12AX7, tomado del mítico amplificador Marshall JCM-800.
Design Drawing
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PCB
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ID Name Designator Footprint Quantity
1 ECC83 V1,V2 Base para ECC83 INVERTIDA 2
2 Plug hembra para PCB CN1,CN2 Plug hembra PCB 2
3 1M R1 Res 1/2W 1
4 68K R2 Res 1/2W 1
5 2K7 R3 Res 1/2W 1
6 100K R4,R7,R12,R13 Res 1/2W 4
7 1M Log PREAMP,MASTER Pot Simple 2
8 10K R5 Res 1/2W 1
9 470K R6,R8,R9 Res 1/2W 3
10 680n C1 Cap 20mm 1
11 22n C2,C5,C9,C10 Cap 10mm 4
12 1n C3 Cap 10mm 1
13 470p C4,C6,C8 Cap 10mm 3
14 820R R10 Res 1/2W 1
15 10K 2W R11 Res 2W 1
16 56u / 400V C7,C11 Cap Electrolitico 35mm 2
17 33K R14 Res 1/2W 1
18 220K TREBLE Pot Simple 1
19 1M log BASS Pot Simple 1
20 22K MIDDLE Pot Simple 1
21 Salida al amplificador CN3 Conector Berg (GP) de 2 pines 1
22 Transformador (248VAC) CN4 Conector GZ 2 Pines 1
23 1N4007 D1,D2,D3,D4 DO-41 4
24 Transformador (6.4VAC) CN5 Conector Berg (GP) de 2 pines 1
25 200mA 400V F1 Fusible grande 2 1
26 100n C12 Cap 10mm 1

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