--------
In message <8be4f2b1-171b-4117-88a5-a6dc64d98...@n1k.org>, Bob Camp writes:

>Most potentiometers have very good TC when used in a “ratio mode”. 
>You can quickly mess that up by putting resistance in series with
>the pot. It’s a bit surprising how may times you see this inherent stability
>messed up that way.

Yes, but they do have a good reason for it here:  They want the
C-field pot to be "calibrated" in frequency so they need the
resulting voltage to follow the quadratic C-field sensitivity
decently well.

I still havn't figured out what component is responsible for the
huge tempco, but it is not the C-field pot.  There's a few PPM
there but not that many.

-- 
Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
p...@freebsd.org         | TCP/IP since RFC 956
FreeBSD committer       | BSD since 4.3-tahoe    
Never attribute to malice what can adequately be explained by incompetence.
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