[time-nuts] LN RB

[John Miles]

> http://www.ke5fx.com/lnrb_18hrs_phase.png
> 
> No excursions beyond +/- 10 ns so far, we'll see how it does over the next
> few days.

Something else I should note is that the 'house clock' GPSDO in the magenta
trace (a) is very well-shielded from airflow in an unventilated rack
enclosure; (b) has been painstakingly optimized for that very environment;
and (c) has been running almost uninterrupted for about 10 years.  

The LN Rb unit in comparison is unenclosed and strapped to a rack rail with
a cable tie.  It's a preproduction unit that was GPS-locked at this location
for only about eight hours before I started the test.  So I'm actually
pretty happy with its response to normal room temperature variations, given
the handicaps I'm imposing on it.

-- john, KE5FX
Miles Design LLC