On Mon, 25 Sep 2017 20:08:01 -0500, Foxs Mercantile
wrote:

On 9/25/2017 3:35 PM, Dave M wrote:
I see that they actually start conducting well below 1uA, so I feel
confident that the 1N4104 will do the job for you.
All the other zeners that I found are SMD devices, so I doubt that
you'll be interested in any of those.

Previously I wrote:

The simplest is a 20K resistor in series with a 10v zener diode.
Use a low current Zener so the knee works right at low values.
Something like this:
http://www.mouser.com/ds/2/395/BZX55C2V0%20SERIES_D1610-1099630.pdf
Note, this is a DO-35 package.


So, if the / any issue to the zener solution is the closeness of any
knee to the bottom end of the required voltage range, would the using
the / a lower reference and a potential devider to set the fsd on 15
volts be a better idea still (or have I missed something again)? ;-(

Cheers, T i m