Unlike Rb's Tbolts do not need a heatsink. The OCXO to some degree holds the board temperature wise constant. We all know that walking past it we see a change. That is not the OCXO but the board and our tests show that the DAC which is not a DAC in the classical way has a 1 E-10 per C sensitivity. No temperature or voltage control. Bert Kehren In a message dated 7/25/2017 9:06:28 A.M. Eastern Daylight Time, kb8tq@n1k.org writes: Hi It gets back to the term “optimum performance” and the Time Nut bias towards eliminating any source of degradation. Even while locked, temperature does get into the DAC. Blow some air on a unit and watch things move around. It does not go unlocked. It does not exceed any of the specs on it. It does move a bit and you can see the “bump” in a phase plot. Simply blocking drafts is a good first step. Bob > On Jul 24, 2017, at 8:33 PM, paul swed <paulswedb@gmail.com> wrote: > > Interesting discussion. I simply have my TBolt bolted onto an Aluminium > rack panel so I could rack it. I wasn't aware there was any special need > beyond that? Right? > Regards > Paul > WB8TSL > > On Mon, Jul 24, 2017 at 8:12 PM, Bob kb8tq <kb8tq@n1k.org> wrote: > >> Hi >> >> The TBolt is a great unit !! >> >> The main source of temperature impact is the DAC / Voltage reference. >> Since that is a >> “distributed” circuit, the temperature control also needs to cover more >> than just the backplate. >> >> Bob >> >> >> >>> On Jul 24, 2017, at 6:37 PM, Norm n3ykf <normanlizeth@gmail.com> wrote: >>> >>> Hi all! >>> >>> Allowing a friend to borrow a tbolt. >>> >>> Is it necessary to cool (maintain a certain) baseplate temperature for >>> optimum performance? >>> >>> Currenlty mounted inside an aluminum chassis. It's screwed to an >>> aluminum sheet that covers around 2/3 the base. >>> >>> Thanks, >>> >>> Norm n3ykf >>> _______________________________________________ >>> 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. _______________________________________________ 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.

		Attila Kinali

Hoi Bert, On Tue, 25 Jul 2017 09:53:32 -0400 Bert Kehren via time-nuts <time-nuts@febo.com> wrote: > That is not the OCXO but the board and our tests show that the > DAC which is not a DAC in the classical way has a 1 E-10 per C sensitivity. What do you mean by "is not a DAC in the classical way"? Attila Kinali -- You know, the very powerful and the very stupid have one thing in common. They don't alters their views to fit the facts, they alter the facts to fit the views, which can be uncomfortable if you happen to be one of the facts that needs altering. -- The Doctor