In Reply to: Re: For high current low voltage pure DC & low cost, what else can beat it? (nt) posted by dave slagle on May 8, 2007 at 16:04:51:
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
This post is made possible by the generous support of people like you and our sponsors:
Follow Ups
- Why a "wideband" series inductor? - cheap-Jack 08:25:09 05/10/07 (2)
- Re: Why a "wideband" series inductor? - dave slagle 09:01:34 05/10/07 (1)
- Yes, but for IDH heaters which I float them .. - cheap-Jack 13:43:12 05/10/07 (0)