[time-nuts] Good GPSDO on eBay?

[Mark Sims]

All the affordable GPSDOs out there are surplus telecom devices...  Thunderbolts,  Z38xx's,  NTPxxxx, etc.   They were built to rigorous telco standards and can be excellent performers.  Just because they are surplus, does not make them junk.   

The latest round of surplus GPSDOs to hit the market are these "UCCM" units.   They started out at around $50 and after people figured out what they were and how to use them the price jumped to $100+ (Thunderbolts and Z3801A's did the same thing,  now a surplus one can set you back  $300-$400.  I suspect that these will follow the same path) You can find the UCCM devices as bare boards or built up into boxes.   As far as real money,  a surplus $100 unit or new $500+ unit?  What's in your wallet?  The UCCM based devices should not be confused with or compared to some home-brew GPSDO cobbled together in a similar looking box. 

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> Recycled components sold for real money.
Too many "versions" to figure out "what you got".
If all you want is a frequency standard to turn it on and "forget it" 
spend a few extra bucks and get one with all new components from a 
domestic company.