I have a small stereo amplifier based upon the TDA2030. Only one output is being used. Instead of connecting a speaker, I would like to drive an air core coil. Since the coil provides negligible resistance, I need to protect the amp's output with a series resistance. The input signal to the amp would be an audio wave from a function generator for test purposes. In other words, not music.
What value resistor should I place in series with the coil to compensate for the loss of the speaker's 8 ohm impedance? Given that the signal is continuous, should I provide a margin of error so the amp does not overheat.
If the amp is capable of 10W should the resistor be of that value or higher? Again to provide a margin of error.
Thank you for any suggestions.
What value resistor should I place in series with the coil to compensate for the loss of the speaker's 8 ohm impedance? Given that the signal is continuous, should I provide a margin of error so the amp does not overheat.
If the amp is capable of 10W should the resistor be of that value or higher? Again to provide a margin of error.
Thank you for any suggestions.