[time-nuts] FE-5650A Rb: your opinions?

John Miles jmiles at pop.net
Mon Apr 28 15:23:27 EDT 2008

Given the low prices Thunderbolts have been selling for lately, I believe
most people are better off with one of those, or a similar high-quality GPS
slock.  If you expect very poor GPS coverage with lots of complete signal
dropouts, then perhaps an Rb-based standard makes more sense.

-- john, KE5FX

> At this date I have no "frequency standard" at home.
> I'd like to buy one FE-5650A Rb used unit (230US$ s/h included)
> so I will be
> able to use it as a reference/comparation for my future DIY GPSDO.
> BTW, I found interesting the provision to use the internal DDS to generate
> different frequencies than 10MHz: maybe I will use a different DDS chip
> (9912) so the resolution will be 48 bits instead of 32...
> Or will it be better to spend my money in something like a
> Thunderbolt unit?
> ..      thanks in advance
> _        Elio.
> P.S. do you know what is the WORKING temperature of the unit? I
> checked the
> data sheets but couldn't found
> any reference to it: do I need to fix it to a heatsink?
> P.P.S. I live in Europe, so now I have a really good Euro/Dollar exchange
> rate! :-)

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