Hello, this is my first post, the construction of Rubidium is going on. Here are some photos.  Efratom LPRO. Gianni

Welcome to time-nuts Pastorino. Very nice reuse of some box. A question how big is the heat sink on the Eftratom? Or is it what came with the unit? Regards Paul WB8TSL On Tue, May 31, 2022 at 1:42 AM Pastorino G. via time-nuts < time-nuts@lists.febo.com> wrote: > Hello, this is my first post, the construction of Rubidium is going on. > Here are some photos. Efratom LPRO. > > Gianni > _______________________________________________ > time-nuts mailing list -- time-nuts@lists.febo.com > To unsubscribe send an email to time-nuts-leave@lists.febo.com

And a heatsink, which I cut, taken from an inverter. I made the dimensions of the Efratom. Regard. Gianni Iz1DFI Il Mar 31 Mag 2022, 14:58 paul swed <paulswedb@gmail.com> ha scritto: > Welcome to time-nuts Pastorino. Very nice reuse of some box. > A question how big is the heat sink on the Eftratom? > Or is it what came with the unit? > Regards > Paul > WB8TSL > > On Tue, May 31, 2022 at 1:42 AM Pastorino G. via time-nuts < > time-nuts@lists.febo.com> wrote: > >> Hello, this is my first post, the construction of Rubidium is going on. >> Here are some photos. Efratom LPRO. >> >> Gianni >> _______________________________________________ >> time-nuts mailing list -- time-nuts@lists.febo.com >> To unsubscribe send an email to time-nuts-leave@lists.febo.com > >

Great Gianni then everything should be fine for a long life. Enjoy. Paul WB8TSL On Tue, May 31, 2022 at 10:00 AM Gianni Pastorino <council.pf@gmail.com> wrote: > And a heatsink, which I cut, taken from an inverter. I made the dimensions > of the Efratom. > > Regard. Gianni > Iz1DFI > > Il Mar 31 Mag 2022, 14:58 paul swed <paulswedb@gmail.com> ha scritto: > >> Welcome to time-nuts Pastorino. Very nice reuse of some box. >> A question how big is the heat sink on the Eftratom? >> Or is it what came with the unit? >> Regards >> Paul >> WB8TSL >> >> On Tue, May 31, 2022 at 1:42 AM Pastorino G. via time-nuts < >> time-nuts@lists.febo.com> wrote: >> >>> Hello, this is my first post, the construction of Rubidium is going on. >>> Here are some photos. Efratom LPRO. >>> >>> Gianni >>> _______________________________________________ >>> time-nuts mailing list -- time-nuts@lists.febo.com >>> To unsubscribe send an email to time-nuts-leave@lists.febo.com >> >>

Hi Gianni, good job! Did you take some special care about the EFC voltage stability vs. temperature? I had some trouble in that, playing around with a LPRO101. It seems that a good voltage reference, a pair of high-precision resistor at the ends of the multiturn pot to reduce the voltage span, end a good multiturn pot, was not so good…. I do not know what was wrong with that…. Anyway a lot of fun! :-) BR Luca Iw2lje Il giorno mar 31 mag 2022 alle 18:35 Gianni Pastorino via time-nuts < time-nuts@lists.febo.com> ha scritto: > And a heatsink, which I cut, taken from an inverter. I made the dimensions > of the Efratom. > > Regard. Gianni > Iz1DFI > > Il Mar 31 Mag 2022, 14:58 paul swed <paulswedb@gmail.com> ha scritto: > > > Welcome to time-nuts Pastorino. Very nice reuse of some box. > > A question how big is the heat sink on the Eftratom? > > Or is it what came with the unit? > > Regards > > Paul > > WB8TSL > > > > On Tue, May 31, 2022 at 1:42 AM Pastorino G. via time-nuts < > > time-nuts@lists.febo.com> wrote: > > > >> Hello, this is my first post, the construction of Rubidium is going on. > >> Here are some photos. Efratom LPRO. > >> > >> Gianni > >> _______________________________________________ > >> time-nuts mailing list -- time-nuts@lists.febo.com > >> To unsubscribe send an email to time-nuts-leave@lists.febo.com > > > > > _______________________________________________ > time-nuts mailing list -- time-nuts@lists.febo.com > To unsubscribe send an email to time-nuts-leave@lists.febo.com >

I used precidion resistors, ref02, and took care of the power supply. We'll see later, how it performs, I still have a lot of work to do. De Gianni Iz1dfi. Il Mar 31 Mag 2022, 20:29 Luca via time-nuts <time-nuts@lists.febo.com> ha scritto: > Hi Gianni, > good job! > Did you take some special care about the EFC voltage stability vs. > temperature? > I had some trouble in that, playing around with a LPRO101. > It seems that a good voltage reference, a pair of high-precision resistor > at the ends of the multiturn pot to reduce the voltage span, end a good > multiturn pot, was not so good…. > I do not know what was wrong with that…. > Anyway a lot of fun! :-) > BR > Luca > Iw2lje > > > Il giorno mar 31 mag 2022 alle 18:35 Gianni Pastorino via time-nuts < > time-nuts@lists.febo.com> ha scritto: > > > And a heatsink, which I cut, taken from an inverter. I made the > dimensions > > of the Efratom. > > > > Regard. Gianni > > Iz1DFI > > > > Il Mar 31 Mag 2022, 14:58 paul swed <paulswedb@gmail.com> ha scritto: > > > > > Welcome to time-nuts Pastorino. Very nice reuse of some box. > > > A question how big is the heat sink on the Eftratom? > > > Or is it what came with the unit? > > > Regards > > > Paul > > > WB8TSL > > > > > > On Tue, May 31, 2022 at 1:42 AM Pastorino G. via time-nuts < > > > time-nuts@lists.febo.com> wrote: > > > > > >> Hello, this is my first post, the construction of Rubidium is going > on. > > >> Here are some photos. Efratom LPRO. > > >> > > >> Gianni > > >> _______________________________________________ > > >> time-nuts mailing list -- time-nuts@lists.febo.com > > >> To unsubscribe send an email to time-nuts-leave@lists.febo.com > > > > > > > > _______________________________________________ > > time-nuts mailing list -- time-nuts@lists.febo.com > > To unsubscribe send an email to time-nuts-leave@lists.febo.com > > > _______________________________________________ > time-nuts mailing list -- time-nuts@lists.febo.com > To unsubscribe send an email to time-nuts-leave@lists.febo.com