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]>+ Factory and User Sound Singles for Waldorf Blofeld: http://Synth.Stromeko.net/Downloads.html#WaldorfSounds _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there.
