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STD RCA BA-2C
RCA BA-2C
License
CC-BY-NC-SA 3.0
License: CC-BY-NC-SA 3.0- 0
Update time：
2022-03-01 09:45:14
Creation time：
2022-02-26 10:38:05
Description
Description
Pcb of the famous RCA BA-2C preamp. Needs 2 1620 or 6j7 tubes. Use a microphone input transformer of 600:10K or higher secondary ratio. Output transformer of 10k:600 is fine.
Design Drawing
Design Drawing
schematic diagram
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| ID | Name | Designator | Footprint | Quantity |
|---|---|---|---|---|
| 1 | 47uF | C1,C2 | CAP-TH_BD13.0-P5.00-D1.2-FD | 2 |
| 2 | 330PF | C3 | CAP-TH_L6.5-W4.0-P5.00-D1.0 | 1 |
| 3 | 1uF | C4 | CAP-TH_L7.3-W5.3-P5.00-D0.5 | 1 |
| 4 | Header-Female-2.54_1x2 | INPUT,OUTPUT | HDR-TH_2P-P2.54-V-F | 2 |
| 5 | Header-Female-2.54_1x3 | POWER,VOLUME | HDR-TH_3P-P2.54-V-F | 2 |
| 6 | 1k5 | R1 | R_AXIAL-0.3 | 1 |
| 7 | 2k | R2 | R_AXIAL-0.3 | 1 |
| 8 | 220k | R3,R4 | R_AXIAL-0.3 | 2 |
| 9 | 33k | R5 | R_AXIAL-0.3 | 1 |
| 10 | 560nF | U3 | CAP-TH_L26.5-W11.0-P22.50-D1.4 | 1 |
| 11 | 6J7 | U1,U2 | OCTAL-C | 2 |
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