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STD Transmissor FM com BF 494
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License: Public Domain
Description
Projeto publicado na revista eletrônica Total número 28 de Janeiro de 1991.
substitui o trimmer de porcelana por um modelo moderno já que o de porcelana não mais é fabricado.
Design Drawing
schematic diagram
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PCB
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| ID | Name | Designator | Footprint | Quantity |
|---|---|---|---|---|
| 1 | Eletreto | MIC | MIC ELETRETO | 1 |
| 2 | 1m | L1 | AXIAL-0.4 | 1 |
| 3 | 47nF | C1 | RAD-0.1 | 1 |
| 4 | 4n7 | C2 | RAD-0.1 | 1 |
| 5 | 5p6 | C3 | RAD-0.1 | 1 |
| 6 | 22nF | C4 | RAD-0.1 | 1 |
| 7 | 20pF | CV | CTZ3 | 1 |
| 8 | 1k | R1 | AXIAL-0.3 | 1 |
| 9 | 8k2 | R2 | AXIAL-0.3 | 1 |
| 10 | 6k8 | R3 | AXIAL-0.3 | 1 |
| 11 | 47R | R4 | AXIAL-0.3 | 1 |
| 12 | BF494 | T1 | TO92-CEB | 1 |
| 13 | ANTENA | U1 | NONE | 1 |
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