This is a simple Audio Millivoltmeter Circuit Diagram. An audio millivoltmeter that's easy to build, accurate and extends to beyond 100kHz. This Audio Millivoltmeter circuit has a flat response from 8Hz to 50 kHz at -3 db on tbe 10-mV range. The upper limit remains the same on tbe less sensitive ranges, but the lower frequency limit covers under 1 Hz.
An Audio Millivoltmeter Circuit Diagram
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