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Description
Elektor EL84 modified with Tone Control+Volume + center Tapped Transformer
It is this project ( http://jogis-roehrenbude.de/Verstaerker/Elektor-PP/Elektor-PP.htm ) with some improvement
Elektor: Ten Watt Valve Amplifier With Just Four Valves
Design Drawing
schematic diagram
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| ID | Name | Designator | Footprint | Quantity |
|---|---|---|---|---|
| 1 | 1K | 220V | 2P-5.0 | 1 |
| 2 | NO | T1,NO | NONE | 2 |
| 3 | EL84 | V1 | TUBES-NOVAL | 1 |
| 4 | El84 | V2 | TUBES-NOVAL | 1 |
| 5 | ECC83 | V3 | TUBES-NOVAL | 1 |
| 6 | EF86 | V4 | TUBES-NOVAL | 1 |
| 7 | 1N4007 | D1,D2 | DO35-7 | 2 |
| 8 | 100Ohm | R1,R2 | R3 | 2 |
| 9 | EZ81 | V5,V6 | TUBES-NOVAL | 2 |
| 10 | 164 | R3 | R3 | 1 |
| 11 | 6H 150 Ohm | T2 | ACM3225 | 1 |
| 12 | 50uF | C1 | CP_8X13MM | 1 |
| 13 | 100uF | C2 | CP_8X13MM | 1 |
| 14 | EF86 | T1 | NONE | 1 |
| 15 | ECC83 | T2,T1 | NONE | 2 |
| 16 | EL84 | U1,U2 | NONE | 2 |
| 17 | 100K | R5,R11,R12 | R3 | 3 |
| 18 | 3K9 | R6 | R3 | 1 |
| 19 | 1M | R1,R2,R7 | R3 | 3 |
| 20 | 100 | R3 | R3 | 1 |
| 21 | * | R4 | R3 | 1 |
| 22 | 330pF | C3 | 1206 | 1 |
| 23 | 10uF/450V | C5,C6 | CP_8X13MM | 2 |
| 24 | 10uF/16V | C1 | CP_8X13MM | 1 |
| 25 | * | C2 | 1206 | 1 |
| 26 | 100nF/400V | C4,C8,C7 | 1206 | 3 |
| 27 | 4K7 | R8 | R3 | 1 |
| 28 | 4k7 | R16 | R3 | 1 |
| 29 | 820k | R14,R13 | R3 | 2 |
| 30 | 1k | R1333,R15 | R3 | 2 |
| 31 | 47uF/25V | C9,C10 | 1206 | 2 |
| 32 | Mutual_Inductor2 | T4 | NONE | 1 |
| 33 | Mutual_Inductors | T5,T6 | NONE | 2 |
| 34 | 47 | R20,R19 | R3 | 2 |
| 35 | 33K | R10 | R3 | 1 |
| 36 | 1K | R21 | R3 | 1 |
| 37 | 4-8-16 | SPEAKER | 1X02 | 1 |
| 38 | 470k | R1 | AXIAL-0.3 | 1 |
| 39 | 620k | R2 | AXIAL-0.3 | 1 |
| 40 | 1M | R3,R8,R17,R18 | AXIAL-0.3 | 4 |
| 41 | 33k | R4 | AXIAL-0.3 | 1 |
| 42 | 3.3k | R5,R14 | AXIAL-0.3 | 2 |
| 43 | 8.2k | R6,R15 | AXIAL-0.3 | 2 |
| 44 | 240 | R7,R16 | AXIAL-0.3 | 2 |
| 45 | 22k | R9,R10 | AXIAL-0.3 | 2 |
| 46 | 330k | R11 | AXIAL-0.3 | 1 |
| 47 | 180k | R12 | AXIAL-0.3 | 1 |
| 48 | 47k | R13 | AXIAL-0.3 | 1 |
| 49 | 1.5uF | C1 | RAD-0.1 | 1 |
| 50 | 50uF | C2,C7 | CAP-D3.0XF1.5 | 2 |
| 51 | 1.8nF | C3,C6 | RAD-0.1 | 2 |
| 52 | 100pF | C5 | RAD-0.1 | 1 |
| 53 | 10uF 50V | C4,C9 | CAP-D3.0XF1.5 | 2 |
| 54 | 100k LINEAR | R19,R20 | RES-ADJ_3386P | 2 |
| 55 | 50nF | C8 | RAD-0.1 | 1 |
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