A problem I had with TE heater coolers was condensation when the ambient temperature was higher than the TE temperature. I was trying to operate the crystals on the lower temperature inflection point. After a while, corrosion became a major issue.
John WA4WDL ---- Bob Camp <kb...@n1k.org> wrote: > Hi > > Yes, it can be done. The performance will be poor, but it will work. > > Bob > > > On May 13, 2016, at 4:15 AM, David <davidwh...@gmail.com> wrote: > > > > Has anybody tried using a thermoelectric cooler to maintain a TCVCXO > > at a constant temperature in lieu of using an OCXO? > > > > I was thinking about this after reading some application notes in > > connection with constant temperature control using TECs with bipolar > > drive. The power required would be pretty low so I think a linear > > control circuit could be used avoiding the noise problems associated > > with a switching controller. Temperature sensor placement would be a > > challenge. > > > > I suppose as part of an automated calibration, the temperature could > > be adjusted over a few degrees from ambient to find any flat spots in > > the oscillator's ppm/C curve. > > > > One place I have run across this application of TECs is with laser > > diodes where coherence length depends on very tight temperature > > control. Typical laser diodes without temperature control have a > > coherence length of millimeters making them useless in more demanding > > applications like interferometry. > > _______________________________________________ > > time-nuts mailing list -- time-nuts@febo.com > > To unsubscribe, go to > > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > > and follow the instructions there. > > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
