I've been looking for a thunderbolt for a while, mostly because they're such a benchmark within this group. I missed the period when they were more commonly available and have mostly found ones that were a lot more expensive, or had a large delivery cost due to being in Australia.
Some cheaper examples turned up on UK ebay. These aren't the classic time-nuts ones but presumably look fairly similar to Lady Heather. https://www.ebay.co.uk/itm/154078750287 I haven't been able to find a comparison of the various thunderbolt models. Is there a description somewhere ? I've found a few hints about this one - I think it's a single 48V supply and possibly a lower-quality OCXO. On Sat, Sep 12, 2020 at 5:14 PM Kevin Schuchmann <[email protected]> wrote: > Matthias, > You are correct, having spent hours looking at all the stable areas > and cooling and heating the gpsdo I find that when it reports that it is > 116.25 F then it is stable. > So now I guess I need to figure out why it is so picky. I will measure > the current draw from a cold start and see if I see the oven warming up > and then stabilizing and then heat and cool it and see how it reacts, > and also look at the electronics and see if an area is overly sensitive > to temperature. > > Thanks > Kevin > > > On 9/11/2020 2:26 AM, Matthias Welwarsky wrote: > > On Freitag, 11. September 2020 01:08:09 CEST Kevin Schuchmann wrote: > >> Guess my image didn't make it, I will add it as an attachment this time. > > The temperature curve seems to show some correlation to what is > happening with > > the DAC. Seems that the DAC and OSC jumps are mostly during periods of > some > > thermal perturbation. > > > > Regards, > > Matthias > > > > > > > > _______________________________________________ > > time-nuts mailing list -- [email protected] > > To unsubscribe, go to > http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com > > and follow the instructions there. > > > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to > http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com > and follow the instructions there. > _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there.
