av genstruktur » 2024-11-25 08:51
Kan man själv mäta ingångsimpedansen så här på ett slutsteg?
Measuring the input impedance of an audio amplifier can be done using a few straightforward methods. Here’s a step-by-step guide for a common approach using a multimeter and a test signal:
Method 1: Using a Multimeter
Power Off the Amplifier: Ensure that the amplifier is turned off and unplugged from the power source.
Disconnect Input Connections: Remove any cables connected to the amplifier's input. This will prevent interference during measurement.
Set Up the Multimeter:
- Set your multimeter to measure resistance (ohms).
- Connect the multimeter probes to the input terminals of the amplifier.
Measure Resistance:
- Read the resistance value displayed on the multimeter. This value represents the input impedance of the amplifier in ohms.
- Keep in mind that this measurement is static and may not represent the impedance at different frequencies.
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