[time-nuts] Power supply for time source concerns

[Charles Steinmetz]

Jim wrote:

> LT3042 removes 60-80 dB up to 10MHz. 20V, 200mA
> https://www.analog.com/media/en/technical-documentation/data-sheets/3042fb.pdf

Achieving 60-80 dB in practice with typical DIY printed circuit layout 
and construction (by this I mean amateur PCB layout, typical board-house 
fabrication, and typical amateur packaging) is extremely unlikely.  Even 
30 dB is highly optimistic.  To get even that far, one needs multiple 
shielding (see list member Gerhard Hoffman's construction photos for 
ideas) and may very well need PC boards with more than two layers.

Not impossible, but not what the average amateur is used to designing 
and building every day.

Best regards,

Charles