These things get their entropy from the ring oscillator's

If your question is "will sampling thermal noise in electronic components give me pretty good randomness?" then yes

>>61858958
>ring oscillator's phase noise
The fucking what now? - EE major

>>61858995
The width of the pulses made by the ring oscillators will change slightly with each subsequent pulse.
I checked legit papers and real scientists call it phase noise.

>>61858958
easiest way to get random numbers is with a cheap sdr dongle. but remember rdrand and openssl will do everything they can to thwart your attempts, so bypass.