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 _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
