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Frequency Standard - GPS or Rubidium?

Discussion in 'General Electronics' started by bart, Sep 2, 2009.

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  1. bart

    bart Guest

    Hi all,

    I'm looking for some sort of frequency standard (10 MHz ref.?).

    Ebay has rubdium standards for under $100.00 and there are GPS
    controlled OXCO standards for $100.00 plus.

    My question :
    Is a 10-20 year old rubidium standard more accurate (even with aging
    drift) that a newer GPS OXCO?

    I can't afford a GPS corrected rubidium ( ~$700.00+).

    I just want to recalibrate my so-so frequency counters .. to hopefully
    within 10 Hz..?

    Opinions?

    Thanks for reading! :)

    Cheers!
    Bart
     
  2. davenn

    davenn Moderator

    13,560
    1,855
    Sep 5, 2009
    Hey Bart,
    A timely question, a number of my fellow amateur radio op's and myself have been buying up the rubidium
    standards from a china ebay supplier recently and have found them to be very very !!! stable ... in fact they are
    that stable that you can see a GPS disciplined osc. doing its periodic pulling of the osc. into line :)
    its a neat trick to do on an oscilloscope. my mates and I are into microwave comms
    and using either GPS or rubidiums as a reference for the local osc. synthesisers
    The advantage of the GPS disc. osc is that it runs off 12V where the rubidiums need 24V 24V is a bit harder to produce when on a hilltop !
    The rubidiums are great in the shack to split up the 10MHz and feed it as a stable reference to spec an's counters, sig gene's etc
    We found the rubidiums to be stable and accurate to within 0.001Hz :D
    seriously amazing

    Dave
    VK2TDN
    Sydney
    Oz
     
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