[time-nuts] Totally unrelated, but..
jleikhim at leikhim.com
Wed Dec 7 14:30:30 EST 2016
Could the low noise parts actually be counterfeit, relabeled as such?
Is the circuit the regulator feeds sensitive to a narrow band of voltage
that the "good regulator" is outside of?
Try replacing the regulator with a battery supply and resistor divider
to attain the working voltage. Move the voltage around. A good
potentiometer and stiff filter capacitors are recommended so as not to
introduce "pot noise".
Is something corrupting your test procedure? I had a circuit that
misbehaved due to floating logic pins reacting to static electricity on
the work bench. Another time a diode was photosensitive.
Leikhim and Associates
JLeikhim at Leikhim.com
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