[time-nuts] Re: FS740 Thoughts?

[Dana Whitlow]

But if you can stand the ADEV hump around 2 sec, the PRS-10 is delightful.

BTW, the ordinary factory new PRS-10 does provide for direct locking to 1
PPS,
but many of the available surplus units had that feature removed.  Tne new
PRS-10's sold for years for $1595, but I see that it has gone up to $1695
since
I had last checked.

Dana


On Wed, Nov 17, 2021 at 9:52 AM Bob kb8tq <kb8tq at n1k.org> wrote:

> Hi
>
> In this case it’s not thermal. I’ve tested a ton of parts in the same
> environment ( maybe
> not 2,000 pounds but several hundred OCXO’s ).
>
> The PRS-10 gives you that hump at 2 seconds no matter what you do. It’s
> part of the
> basic design of the unit ….
>
> Bob
>
> > On Nov 17, 2021, at 10:16 AM, Matt Huszagh <huszaghmatt at gmail.com>
> wrote:
> >
> > Bob kb8tq <kb8tq at n1k.org> writes:
> >
> >> I have a 740 as do others on the list. The big gotcha is the OCXO in
> the device.
> >> It has various quirks that limit the performance of the device. The
> ADEV plot they
> >> show for the OCXO is a “sometimes / maybe / might” sort of thing. One
> of the
> >> “get to it eventually” projects here is to see if it can be replaced
> with something
> >> that has better ADEV performance.
> >
> > Good to know. Have you tried disciplining the PRS-10 in one of these
> > units? Based on Dana's comments, it sounds like this may not exhibit the
> > same ADEV susceptibility to the thermal environment.
> >
> > Matt
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