[time-nuts] Has anybody checked this? GPSDO in kit

Tim Shoppa tshoppa at gmail.com
Sat Oct 22 10:34:53 EDT 2016

I just went and visited their website, and see they also offer a "kit OCXO"
from mostly through-hole parts and PCB. The OCXO insulation box is made out
of PCB, the thermostat is simply a jellybean TO92 transistor, and the 27MHz
crystal is an AT-cut being operated around 45C, so nothing awful
time-nutty, but still pretty neat that it's a kit. Details at


show that it walks about 14ppm during warmup and then might be good to a
ppm or so.

Tim N3QE

On Sat, Oct 22, 2016 at 10:02 AM, Giuseppe Marullo <giuseppe at marullo.it>

> Hello,
> I know, I know it is not supposed to be high end stuff(timenutted), but I
> was looking for a GPS clock and noticed that this could be a cheap GPSDO
> too:
> http://qrp-labs.com/progrock.html
> It has a OCXO option, a box, a display(customizable), a GPS and could be
> probably fitted with a Raspberry Zero for a cheap NTP server too.
> Any advice?
> Sorry if this has been already discussed here, didn't find any reference
> in the ML.
> Could it be compared to a Thunderbolt GPSO in terms of performance, how
> worse it could be?
> I just need a clean/self-calibrating  10MHz reference to tune HF radios
> ...seems good enough for the price.
> Giuseppe Marullo
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