29-10-2012, 11:00 AM
(28-10-2012, 05:49 PM)Yorkie Wrote: What about noise when powering radios rather than nixies - is that an issue Nick?
All boost SMPSs work by switching fairly reasonable currents (in the order of a few amps) at annoying frequencies - they generate noise on both the input & output, and the magnetics also contribute... The hard switching which is an inherent part of the design also generates harmonics...
In other words, SMPSs have many advantages, but also (in an audio/RF environment), significant disadvantages...
When using one of these devices I use a MuRata BNP002-03 on both input & output with the sections daisy-chained and with the whole lot built into an FR4 (or similar) screened box with feed-through connections... The reason I use the BNP002-03? I have a box of them
Yes, they are nominally rated for 50V, however the dielectric is good to 300V and I've never had one fail (yet)...Cheers
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