[time-nuts] Which First GPSDO to buy?

[Bob Camp]

Hi

The problem with “build it yourself” is that there is no way do know if you got it right unless you have something to compare your design to. You *will* make mistakes as you build one of these….

Bob

> On Dec 13, 2014, at 3:04 PM, Lizeth Norman <normanlizeth at gmail.com> wrote:
> 
> I second the "build it yourself" comment. GPS receivers and steerable
> oscillators are cheep on the bay. Steep learning curve, however, the
> ideas carry over to many, many other things.
> 
> There are certainly more stable/accurate ways to do it. Spending money
> is not always the best idea at first, at least if you're interested in
> why. Later, when I understood more about the nuts and bolts, valuing a
> particular buy is easier.
> 
> Do have fun. This stuff is a gas. Beware, if you're a pack rat, it's
> an acquisitive hobby.
> 
> Norm n3ykf
> 
> On Sat, Dec 13, 2014 at 5:30 AM, Neil Schroeder <gigneil at gmail.com> wrote:
>> In a relative newcomer to this intense of a crowd :-).  But j also found
>> that I'm not quite  instrumented (yet) to tackle the accuracy problem.  As
>> such Im focusing where i can  on what I know (power, systems, the like)
>> while I accumulate the other gear.
>> 
>> As such I can say the thunderbolt and now the lte lite have been rock
>> solid.
>> 
>> On Friday, December 12, 2014, Anthony Roby <aroby at antamy.com> wrote:
>> 
>>> I'm in the same beginners' category as you.  I'd do more but have other
>>> projects on the go and have found I would need more equipment (GPIB
>>> interfaces, a spectrum analyzer etc) to get much further.  That said, I
>>> like the Lucent KS24361 and have a few bits and pieces on order to tap into
>>> J8 on the board of REF-1 and double the 5MHz for use in the lab.  I picked
>>> up a decent antenna on eBay, it's probably not in an ideal spot but that
>>> was a tradeoff between aesthetics on the house / access to pull a coax down
>>> to the basement / height of my ladder, and it seems to work fine.  Power
>>> supply was also auction-sourced for less than $20 and runs nicely.  I think
>>> eventually I'll make a panel and install the unit in my basement rack.
>>> 
>>> I have no need for the time-nuts accuracy, but I have to say I've found
>>> this whole area fascinating and have learned a ton over the past couple of
>>> months toying around with this stuff and absorbing the expertise from the
>>> group here.
>>> 
>>> Anthony
>>> 
>>> -----Original Message-----
>>> From: time-nuts [mailto:time-nuts-bounces at febo.com <javascript:;>] On
>>> Behalf Of Hal Murray
>>> Sent: Friday, December 12, 2014 6:49 PM
>>> To: Discussion of precise time and frequency measurement
>>> Cc: hmurray at megapathdsl.net <javascript:;>
>>> Subject: Re: [time-nuts] Which First GPSDO to buy?
>>> 
>>> 
>>> 
>>> kc0wjn at gmail.com <javascript:;> said:
>>>> For a newcomer to this field, which GPSDO would be better to purchase
>>>> as  a first-time acquisition: ...
>>> 
>>> I'd suggest the Lucent KS24361.  Lots of people here have them so it will
>>> be easy to get advice.
>>> 
>>> 
>>> Aside from the GPSDO, you also need a power supply and antenna, and coax to
>>> get to the antenna.  It will work a lot better if the antenna is in a good
>>> location.  GPS is 1.5 GHz, so you have to pay attention to loss in the
>>> coax.
>>> 
>>> 
>>> --
>>> These are my opinions.  I hate spam.
>>> 
>>> 
>>> 
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