[time-nuts] HP5065A C-field current voltage mod

[Poul-Henning Kamp]

--------
In message <04c901d0e762$210659e0$63130da0$@miles.io>, "John Miles" writes:

>I have to wonder if the Implementers mistakenly blamed the RVFR
>for drift in some other component.

When I got my 5065A, it had a very obvious and consistent drift of
-3e-13/day.   The MDEV turns upwards around 100k seconds.

However, that was right after I received the unit and replaced the
OCXO, so it may be the front end of a bath-tub curve and not indicative
of the drift once the unit got properly "burned in".

In my current run, at 470.000 seconds (5.5 days), with the Fluke
732+resistor C-field driver, there is no sign of any drift yet.

So yes, it may not be the RVFR that's drifting (most) and that just
makes this game even more fun...

-- 
Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
phk at FreeBSD.ORG         | TCP/IP since RFC 956
FreeBSD committer       | BSD since 4.3-tahoe    
Never attribute to malice what can adequately be explained by incompetence.