[time-nuts] Linear voltage regulator hints...
brooke at pacific.net
Mon Dec 8 22:35:48 EST 2014
Did you use the 723 or . . . .?
As far as I know the 723 is supposed to have low noise.
Richard (Rick) Karlquist wrote:
> 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 -- time-nuts at febo.com
> To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
> and follow the instructions there.
More information about the time-nuts