[time-nuts] Totally unrelated, but..

[Van Horn, David]

I did check the circuit through the whole range that it should operate in, based on component data sheets. No issues.
I also carefully varied the voltage right around where the regulator output is, to see if there was some very narrow band of sensitivity.
Nothing.

-----Original Message-----
From: time-nuts [mailto:time-nuts-bounces at febo.com] On Behalf Of Joe Leikhim
Sent: Wednesday, December 7, 2016 12:31 PM
To: time-nuts at febo.com
Subject: Re: [time-nuts] Totally unrelated, but..

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.



--
Joe Leikhim


Leikhim and Associates

Communications Consultants

Oviedo, Florida

JLeikhim at Leikhim.com

407-982-0446

WWW.LEIKHIM.COM

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