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Product Introduction:
This board adopts FM stereo transmit integrated BA1404 and 9018 radio frequency amplification circuit.
It has stable frequency,and operating voltage is 3V. It adopts frequency modulatoion stereo transmitting technique,
and it can transform stereo audio signal to frequency modulation stereo electric wave;and it can also achieve
stereo audio signal wireless high fidelity transmission.This board can be used as wireless microphone;
when plug into stereo audio signal as transmitter.Operating frequency is 85－115MHz continuous and adjustable,
its reference transmitting distance is 10-100m.
| NO. | Components | Silk Screen | Parameter | QTY |
| 1 | Resistor | R1,R9,R10 | 2.2K ohm | 3 |
| 2 | Resistor | R6,R7 | 51K ohm | 2 |
| 3 | Resistor | R2 | 100K ohm | 1 |
| 4 | Resistor | R4 | 1 ohm | 1 |
| 5 | Resistor | R11 | 15 ohm | 1 |
| 6 | Resistor | R12 | 1K ohm | 1 |
| 7 | Resistor | R3 | 47K ohm | 1 |
| 8 | Crystal Oscillator | Y1 | 38KHz | 1 |
| 9 | Adjustable Capacitor | CV | 30pF | 1 |
| 10 | Color Ring Inductor | L2,L4,L3 | 100uH | 3 |
| 11 | Duplex Adjustable Resistor | RP2 | 10K ohm | 1 |
| 12 | Toggle Switch | S1 | Single-Pore | 1 |
| 13 | IC | U1 | BA1404 | 1 |
| 14 | Electrolytic Capacitor | C1,C2,C3,C8,C28,C29 | 10uF | 6 |
| 15 | Ceramic Capacitor | C4 | 220pF | 1 |
| 16 | Ceramic Capacitor | C5 | 0.01uF | 1 |
| 17 | Ceramic Capacitor | C6,C23,C24,C25,C26,C19,C20,C21 | 0.1uF | 8 |
| 18 | Ceramic Capacitor | C17,C18,C13,C14,C9 | 1000PF | 5 |
| 19 | Ceramic Capacitor | C16,C15 | 20PF | 2 |
| 20 | Electrolytic Capacitor | C22 | 47uF | 1 |
| 21 | Ceramic Capacitor | C7,C11,C27,C12,C10 | 10pF | 5 |
| 22 | Air-Cored Inductor | L1,L6,L5 | 7T | 3 |
| 23 | Audio Socket | J1 | 3F07 | 1 |
| 24 | Triode | Q1 | 9018 | 1 |
| 25 | PCB | 1 |
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