The crackling noise associated with turning the shaft of a dirty potentiometer in an audio circuit ( such as the volume control ) is greatly accentuated when an undesired DC voltage is present, often indicating the failure of a DC blocking capacitor in the circuit.
12.
:: : Yes, energized, but LCR meters don't like applied DC voltages so put a DC blocking capacitor in series with the meter and the DUT . You can either make the blocking capacitor largish ( say, 1nF ) so its effects are immaterial or you can do the series-capacitor calculation to mathematically remove its effects later.
13.
:: : Yes, energized, but LCR meters don't like applied DC voltages so put a DC blocking capacitor in series with the meter and the DUT . You can either make the blocking capacitor largish ( say, 1nF ) so its effects are immaterial or you can do the series-capacitor calculation to mathematically remove its effects later.
14.
:If you're really interested and you have a capacitance meter, it'd be pretty easy to measure : just put a known-value blocking capacitor in series with the battery, short the combined battery-capacitor series circuit ( so the blocking cap charges up and no inrush current damages your meter ), attach the series circuit to your meter, and unshort the series circuit.
15.
They include the ?-source, T-source, trans-Zsource, TZ-source, LCCT-Z-source ( proposed in 2011 by "'Dr Marek Adamowicz "'and utilizing high frequency transformer connected in series with two dc-current-blocking capacitors ) [ 16 ], high-frequency transformer-isolated, and Y-source [ 5 ] networks.
