time-nuts@lists.febo.com

Discussion of precise time and frequency measurement

View all threads

Re: [time-nuts] Efratom FRS 10mhz rubidium frequency oscillator+ board

G
GandalfG8@aol.com
Fri, Jun 5, 2009 9:56 PM

In a message dated 05/06/2009 22:50:44 GMT Daylight Time, yuri@ostry.ru
writes:

By the  way, I still think about building something more useful to be
put to the  same place in that nice metal box. For example PIC with
serial interface to  the outside world and fine tuning DAC to adjust Rb
source, plus cleanup PLL  loop with TCXO, plus some divider to 2
or 4 isolated outputs... Maybe same  PIC for monitoring everything inside,
from temperatures and voltages to Rb  unit health status (lamp voltage,
lock status, etc)...

If enough  people have such units, it may become group  project...


Hi Yuri

That's an interesting thought but those that Bob is supplying are  offered
without the metal box.
He does have them available but estimates the weight at 5Kg which, for me
anyway, would have put too much on the delivery cost.

regards

Nigel
GM8PZR

In a message dated 05/06/2009 22:50:44 GMT Daylight Time, yuri@ostry.ru writes: By the way, I still think about building something more useful to be put to the same place in that nice metal box. For example PIC with serial interface to the outside world and fine tuning DAC to adjust Rb source, plus cleanup PLL loop with TCXO, plus some divider to 2 or 4 isolated outputs... Maybe same PIC for monitoring everything inside, from temperatures and voltages to Rb unit health status (lamp voltage, lock status, etc)... If enough people have such units, it may become group project... --------------------- Hi Yuri That's an interesting thought but those that Bob is supplying are offered without the metal box. He does have them available but estimates the weight at 5Kg which, for me anyway, would have put too much on the delivery cost. regards Nigel GM8PZR
YO
Yuri Ostry
Sat, Jun 6, 2009 7:00 AM

Hello,

Saturday, June 6, 2009, 1:56:31, GandalfG8 wrote:

G> That's an interesting thought but those that Bob is supplying are  offered
G> without the metal box.
G> He does have them available but estimates the weight at 5Kg which, for me
G> anyway, would have put too much on the delivery cost.

I mean only nice inner small box, that is made of galvanized sheet steel
(and provide additional magnetic shielding for rb source, as I think).
It is easily detachable from large outer case and heatsink, and will
not add that much to weight or volume weight. You can put it on
another heatsink pretty easily (but I decided to keep whole casing).

--
Best regards,
Yuri                          mailto:yuri@ostry.ru

Hello, Saturday, June 6, 2009, 1:56:31, GandalfG8 wrote: G> That's an interesting thought but those that Bob is supplying are offered G> without the metal box. G> He does have them available but estimates the weight at 5Kg which, for me G> anyway, would have put too much on the delivery cost. I mean only nice inner small box, that is made of galvanized sheet steel (and provide additional magnetic shielding for rb source, as I think). It is easily detachable from large outer case and heatsink, and will not add that much to weight or volume weight. You can put it on another heatsink pretty easily (but I decided to keep whole casing). -- Best regards, Yuri mailto:yuri@ostry.ru