Tom:
I saw you post to David on the Time Nuts list offering availability of a
Thunderbolt.
If you have additional units available I would be interested in one as
well.
Let me know if you have any available and the cost.
Thanks,
Mike George
N3MUY
On 4/15/2014 14:03, Tom Van Baak wrote:
Dave,
If you're just calibrating a frequency counter you may not need a GPSDO. A
simple GPS 1PPS is all you need; just measure the time from the 1PPS to the 10
MHz, wait a minute or an hour or a day and do it again. This will show you the
time drift, from which you can calculate the frequency error.
Still, having a 10 MHz GPSDO available is usually more convenient, so I would
not talk you out of it.
If you don't want to spend time to design your own GPSDO, or to build one of
the dozen homebrew projects on the web, I would recommend you get a Trimble
Thunderbolt. They are as turn-key as you can get, but also allow great hacking
if you so choose.
I have some left over from the group buy. If you're interested contact me
off-list.
Thanks,
/tvb
----- Original Message -----
From: "David Feldman" <[email protected]>
To: <[email protected]>
Sent: Tuesday, April 15, 2014 8:27 AM
Subject: [time-nuts] Looking for GPSDO for home use
I found this reflector after searching for GPSDO that would be suitable for
individual purchase/use. Each time I found an article about GPSDO projects,
that lead me to a surplus GPS module that is either no longer available, not
current production, undocumented, or otherwise difficult to source. I don't
mind doing my own building/integration, and am not adverse to starting with a
used or suplus component, I'm not sure where to start in terms of sourcing the
GPS module/antenna/etc. My main need is for something to serve as a primary
frequency standard (i.e., 10 MHz output) I can use to set a voltage controlled
OCXO I just installed in my (otherwise cheap chinese) frequency counter. It
seems there are some modules that have/had 10 kHz output; that would work too.
Even 1 PPS output seems like a workable starting point, but at the expense of a
different and/or more difficult path to get to a 10 MHz reference signal I seek.
Any advance or pointer to source (reasonable cost, whatever that means!) would
be appreciated.
Thanks!
Dave
[email protected]
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