[time-nuts] Selecting server hardware (newbie question)
phk at phk.freebsd.dk
Sat Jan 28 14:53:56 EST 2006
In message <43DB5F6A.1090200 at pipe.nl>, Nero Imhard writes:
>On 28 jan , at 10:54, Poul-Henning Kamp wrote:
>> A Soekris NET4501, a bit of work with a soldering iron, an OCXO possibly
>> with a PLL to generate something roughly 33MHz and a GPS receiver
>> will get you about as good a NTP server as money can buy and at a
>> rock bottom price.
>I am currently building precisely that (using an IsoTemp OCXO134-10).
>However, the main problem I run into is my inability to find a source for
>the type of PLL chip that Poul-Henning is suggesting in his page (the
>ICS525R-02I "OSCaR", which looks pretty ideal for this application).
>Does anyone here have suggestions on where to get these chips, or does
>anyone know an alternative PLL circuit with more easily obtainable parts?
You can also use the smaller and less flexible ICS502 etc. They have
a handful of fixed ratios you cal select with pin-strapings.
As long as your final frequency is in the 25-35 MHz range it will work
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.
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