[time-nuts] Totally unrelated, but..

Bob Camp kb8tq at n1k.org
Thu Dec 8 00:41:00 EST 2016


The problem with a “simple” filter is that they rarely work as well as you might think
they do. Grounding and other layout issues generally get you sooner than you would
think. Coils and caps are often not as broadband as you would hope….


> On Dec 8, 2016, at 12:34 AM, Hal Murray <hmurray at megapathdsl.net> wrote:
> kb8tq at n1k.org said:
>>> the cool thing about those parts is that their PSRR extends
>>> up to several MHz.  A lot of LDOs have good PSRR to kHz. 
>> Which to bring it back to noise in radios ….. could be the issue there. The
>> device isn’t oscillating, it’s just not blocking the crud from upstream. 
> Would a simple L-C type filter on the input side solve that?
> -- 
> These are my opinions.  I hate spam.
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