[time-nuts] Power supply for OCXO using "USB power blocks"

[Achim Gratz]

jimlux writes:
> How quiet is the output from those USB battery things..I've used one
> to run a RTL-SDR, but that's hardly a ultimate low noise receiver.

Depends, but I suspect that most of them favor cheap over quiet -- they
do already have a DC-DC in there that gets whatever the accumulator
voltage is to 5V.  I also have one of these that is really noisy when it
has no load, but seems to be OK when I start pulling a few mA.

Plus, chaining DC-DC like you outline really isn't helping efficiency
wise.  Unless you already have a bunch of USB power banks you want to
reuse (I'd still think about just using the cells then), perhaps have a
look at some of the stuff that the RC model crowd is using.


Regards,
Achim.
-- 
+<[Q+ Matrix-12 WAVE#46+305 Neuron microQkb Andromeda XTk Blofeld]>+

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