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Why a "wideband" series inductor?

Hi.

Battery, dry or wet, is a very complex AC network by itself, techncally much worse than a capacitor.

To provide a bypass for the return signals, I installed a 5uF250VAC fan-motor cap, & a 333nF250VAC PP box film cap parallel to the battry O/P terminals. Also 2uF100V PE box film cap at the heater
DC supply I/P in the phonostage side.

If the idea of addding a "wideband" series inductor is to remove the RF noises emitted from the SM charging board, then it would be needed.

As when the SLA cell is draining to power the tube heaters, the SMPS board is swithced off & electrically totally disconnected from the battery circuit. Of course, I already add RF ferrous suppressor ring onto the phonostage power cord as well as the DC O/P power cord of the batttery power pack as a RF safeguard.

c-J


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