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200W Hybrid Audio Amplifier Circuit - c onnecting two TDA2030 thru cheap power transistors we can create a amplifier wich can deliver a higher power. With the components value from the schematic the total amplifier gain is 32 dB. The speaker can be 2 ohm instead of 4 ohm if we use the TIP transistors. TDA 2030 is produced by SGS Ates and is a complete audio amplifier. AB class of the final amplifier cand deliver up to 14W on 4 ohm at a +-14V power supply. With a proper designed power supply this audio amplifier can output 200W. Active components: IC1, Ic2 TDA 2030 T1, T3 = BD 250, TIP 36 T2,T4 = BD 249, TIP 35 D1 … D4 = 1N4001 200W Hybrid Audio Amplifier Circuit

2 corrections I'd like to point out:
ReplyDelete1. The diode between the 150k and 15k resistors should be mirrored horizontally, because the bias circuit going to the output tube should receive NEGATIVE BIAS in order for it to properly work. With the current schematic, you're feeding a POSITIVE BIAS, which will make the tube pull too much current, redplate, and fail.
2. The capacitors on that bias circuit are labeled as being "100W", when they should be "100V". They should also be mirrored, vertically, as the output from the rectifier diode will be more negative than ground, therefore the positive lead of those capacitors should go to ground.
Other than those errors, it seems like a nice circuit.