Hi If you are "only" worried into 1 Hz or even 0.1 Hz, temperature on the coax will not be a big issue. If you are trying to maintain 170 dbc at the far end of the wire, shielding and isolation will be a *big* issue. You may need some pretty fancy cable and magnetics to make that work….
Bob On Apr 23, 2013, at 3:49 PM, Kevin Rosenberg <ke...@rosenberg.net> wrote: > On Apr 23, 2013, at 4:43 AM, Bob Camp <li...@rtty.us> wrote: >> Like any design, the first question is - what's the goal? > > My favorite first question, too. Move my most stable OXCO in > the 1 Hz to 10 KHz range to the more stable environment, > and maintain its phase noise of -100 dBc/Hz @ 1 Hz and > -170 dBc/Hz at 10 kHz. > > Since the cable will be inside the structure, passive insulation > should help keep the temperature change rate < 1 degK / hr. > Though, the HVAC does cycle the lab ambient temperature a few degrees > K per hour. > > Twinax is an interesting idea, thanks. > > Kevin > > _______________________________________________ > 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.
