[time-nuts] Frequency referenced temperature regulator

[Mark Sims]

Well,  you could just toss a Thunderbolt into the box and use Lady Heather to do the temp control.  Using just a fan and cardboard box and maybe some thermal mass,  you can stabilize the temperature to within a few millidegrees (microdegrees long term average) as long as the desired temp is between ambient and say 50-60C.  To go below ambient you would need a peltier.  You could move the temp sensor off board to keep the tbolt self-heating out of the environment.

I have an ESI SR104 standard resistor and Tbolt mounted in a box.  The control temp is set at one of the two points where the SR104 is at precisely 10,000 ohms...  just for good measure I also have a precision 10 volt reference and a 0.01uF cap in there also...  four standards in one box all basking in the warm glow of a Tbolt.