[time-nuts] Linear voltage regulator hints...
Richard (Rick) Karlquist
richard at karlquist.com
Mon Dec 8 22:32:19 EST 2014
On 12/8/2014 4:53 PM, Bert Kehren via time-nuts wrote:
> We solved that problem by attaching the regulators to the FRK back plate
> which is with fan control is kept within 0.01C. We did not do it for that
> purpose but found that we needed some more heat in order to keep the fan in an
> optimum fan speed. Rb, OCXO and Fan power transistor are on the back
> plate. Works for us.
> Bert Kehren
When I designed the E1938A, I chose a reasonable looking voltage
reference IC and put it inside the oven. I figured that was
the end of it as far as tempco was concerned. It was, but it
turned out that the *noise* of the reference was unacceptable
and of course the oven does nothing to fix that. I had to
switch to a lower noise reference.
Rick Karlquist N6RK
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