[time-nuts] Re: GPSDO - GPS1300-10-1000 by RFX Ltd. UK

[Tom Holmes]

John...

If you haven't already, look into the Leo Bodnar GPSDO. It is a couple hundred bucks US, and the people I know who have them
are  pretty happy with them. Not sure off the top of my head if they make a PPS, however.  And, he is in the UK.

Tom Holmes, N8ZM

-----Original Message-----
From: John Moran, Scawby Design <john at scawbydesign.co.uk> 
Sent: Tuesday, March 01, 2022 5:12 PM
To: time-nuts at lists.febo.com
Subject: [time-nuts] Re: GPSDO - GPS1300-10-1000 by RFX Ltd. UK

Bob, Jim - Thanks for the detailed replies. You have both managed to confirm the difficulties and unknowns involved in being
a fledgling TimeNut.

I think that is what prompted me to try to avoid as many unknowns as possible by buying one that was at least guaranteed to
work, especially in the un-locked mode because I'm not sure what my GPS viewing here will be like until I have a unit to play
with.

A problem we have over here is that there isn't the huge eBay market for such things, so choice is really limited to Chinese
recycled/cloned stuff of unknown provenance. OK, I could buy from a US supplier but, and I will probably be jumped on for
saying this, US suppliers seem incapable of finding reasonably priced delivery methods. A recent example was a nice slide
rule I was interested in for $36, but carriage was $86 ... I didn't buy.

Getting back to GPSDOs - given that, when locked, they are probably all quoted as 'close to Caesium' (British), I will still
buy a new one, but more reasonably priced and then try to acquire an SC-cut crystal to start making an OCXO to eventually
form the heart of a GPSDO. I like the comments about holdover and recovery from holdover ... one of you keeps talking about
rabbit holes, I think I see one looming.

John 
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