Hi All of the Thunderbolt E’s that I have seen have single oven OCXO’s. I don’t know of any “current production” GPSDO’s that come stock with double ovens. There are a few with some interesting options. I have not dug into just what all those odd options actually are.
Bob > On Jul 20, 2021, at 7:55 PM, ew via time-nuts <time-nuts@lists.febo.com> > wrote: > > There is a lot of misinformation out there. It is not the OCXO that changes, > Bruce did extensive testing and I did some too. The Vectron is super, would > like to know what is in it but do not want to open one. Once warmed up the > stable OCXO temperature is a main contributor to the board temperature. Using > a Dual Oven may give you a warm feeling but only adds 1 more Watt of stable > heat to the board making the temperature change smaller. The OCXO is > important during Hold Over and that is why it is there. The changes are the > DAC which is updated once a second. Very temperature sensitive. Cheap. We > have done the tests 10811, OSA 8600, FRK and M100. For fun did use a cheap > small OCXO, no performance change. Was done in Juerg's temperature stable > basement. See attached picture. > > Bert Kehren > My experiences with the T'Bolt have not been entirely satisfactory. If I > set the loop > lime constant long enough to get a satisfying smoothing of the GPS noise (a > few hundred > seconds), then the thermal sensitivity of the VCXO on the T'Bolt rears its > ugly head and > I see a lot of my HVAC system cycling instead. The T'Bolt E supposedly has > a double- > oven XO, so I'd like to give that a try. But my wallet says "whoa"! > > According to Bodnar, his units do have some choices in the time constant > setting. > I've been considering ordering a Bodnar just for frequency agility, but > have been > holding off out of concern for the complications of dealing with a foreign > supplier. > > Dana > <Tbolt_spez.jpg>_______________________________________________ > time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send an > email to time-nuts-le...@lists.febo.com > To unsubscribe, go to and follow the instructions there. _______________________________________________ time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send an email to time-nuts-le...@lists.febo.com To unsubscribe, go to and follow the instructions there.
