On 9/26/2017 11:26 AM, T i m wrote:
On Tue, 26 Sep 2017 06:46:01 -0700 (PDT), wrote:

You want a zener with a nice straight line at the low current end.
One linked to from here has that.


Yeah, ok ... but what about the question re using a lower value zener
to get it away from the 'knee', especially as it's no more difficult
to do?

Here it is again.
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.

--
Jeff-1.0
wa6fwi
http://www.foxsmercantile.com