[time-nuts] Frequency reference

David C. Partridge david.partridge at dsl.pipex.com
Thu Apr 17 10:59:48 EDT 2008

Give me time (accurate time of course) - we all have to start with one

Seriously though, if I've got that sort of budget, can I do better than a

-----Original Message-----
From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On
Behalf Of Dan Rae
Sent: 17 April 2008 15:45
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] Frequency reference

David C. Partridge wrote:

>I'm looking for a frequency reference for my home lab.  Cost is an issue.
>I'm considering either a GPSDO such as the Trimble Thunderbolt if I can 
>get one at a reasonable price, or possibly a rubidium source.

David, to be considered a true time nut, you will not ever be happy with
just one standard...

But joking apart, the Trimble thunderbolt is a very good place to start.  It
can be had for around £130 / $260 US recently from a chinese vendor on eBay;
with the addition of an antenna, free monitoring / set up program
(TboltMon), box and power supply, you then have a very accurate 10 MHz (and
1 pps) standard that needs no further action to calibrate.

Good luck!


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