Car Amplifier Mod: Can It Be Used Practically?

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A car amplifier can be repurposed for practical applications beyond sound amplification, such as powering devices through creative electrical setups. Users have successfully connected amplifiers to transformers to generate specific voltage and frequency outputs for testing purposes. One example involved using a stereo amplifier with a step-up transformer to achieve a few watts of 60 Hz three-phase power. While humorous suggestions for alternative uses include doorstops or anchors, the technical feasibility of repurposing amplifiers for electrical projects is supported by practical experiences shared in the discussion. Overall, car amplifiers can indeed serve innovative roles in various electrical applications.
dannyb16
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Hello, I am new to this site as well as to electrical theory. I recently took a second semester physics course and stumbled upon a great deal of curiosity in the electricity and magnetism portion of the class. I am taking a few courses pertaining to electricity&magnetism as well as engineering this coming semester, so I will try to apply what I learn to better understand the scenario, if even possible. With that being said, I just sold my car subwoofers but still have my amplifier. First off, I was wondering if it somehow could be used for purposes other than sound amplification and then I started to think about a transformer. My main question is this: Can a car amplifier be somehow used for other practical applications?
 
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I needed a few watts of 60 hz three phase 150 volts for a tester.
Wired a stereo amp to a step up transformer , handed it 60 hz from a 6v filament transformer, RC phase shifted one channel 60 degrees and inverted,.. Works great !
 
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jim hardy said:
I needed a few watts of 60 hz three phase 150 volts for a tester.
Wired a stereo amp to a step up transformer , handed it 60 hz from a 6v filament transformer, RC phase shifted one channel 60 degrees and inverted,.. Works great !
I have thought of this also. I am not surprised you utilized this Jim. :)
 
Averagesupernova said:
I have thought of this also. I am not surprised you utilized this Jim. :)
Thanks for the kind words. It was the heart of that gizmo in my avatar...
i had a half dozen little 3 phase transformers custom made, can probably find the part number if you need a few.
 
I am trying to understand how transferring electric from the powerplant to my house is more effective using high voltage. The suggested explanation that the current is equal to the power supply divided by the voltage, and hence higher voltage leads to lower current and as a result to a lower power loss on the conductives is very confusing me. I know that the current is determined by the voltage and the resistance, and not by a power capability - which defines a limit to the allowable...

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