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Homemade amplifier with burned out bulb (2) TRANSISTORS 4128 Dl (1) Capacitor 1000uf 25v (1) Resistor 1k (1) Rectifier bridge kbu 4d (1) Capacitor 4700uf 25v (1) Regulator 7809 My son's channel;https://bit .ly/32dFIKI facebook;https://bit.ly/2ZpiorI / rosecosta3213 tiktok:https://bit.ly/3k4pMkc https://bit.ly/346ky0K https://bit.ly/31sWN1y https:// bit.ly/33ZkC2o