[time-nuts] GPS W/10KHz

Pete Lancashire pete at petelancashire.com
Mon Feb 10 20:59:47 EST 2014


I would be happy to say a T'Bolt replacement for $250 even $300. I know
$100 was a great price but think about it. If the T'bolt has not existed
and you had to pay $250 or $300 would you have to get the same results ?

I would have, I may not have 1 running and two spares, but I would have
spent the $'s

-pete


On Sat, Feb 8, 2014 at 10:08 AM, Chris Albertson
<albertson.chris at gmail.com>wrote:

> On Sat, Feb 8, 2014 at 9:47 AM, Magnus Danielson <
> magnus at rubidium.dyndns.org
> > wrote:
>
> >
> > Bob is alluding to the fact that the receiver isn't really doing a job of
> > producing that 10 kHz, just as with the PPS signal.
> >
> > As the regular adjustments occurs, the PLL is pulled here and there and
> > this scales up and well... becomes quite large when you hit 10 GHz.
>
>
> The OP wants to use the 10KHz signal to discipline a OCXO, not to run a
> microwave transmitters (at least no directly.)   The (minutes long) time
> constant on the GPSDO will even out any phase anise on the 10KHZ signal.
> So using 10KHz or 1Hz makes lithe difference if you avargage over a handful
> of minutes.  The final output depends mostly on the quality of the OCXO.
>
> For a long time people stopped building GPSDOs because the Thunderbolt sold
> for $100.  The price has gone up and so maybe it's time to think about how
> to build a good GPSDO but with target price under $100 and simple enough
> that a PCB is not required.
> --
>
> Chris Albertson
> Redondo Beach, California
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