Categories

Rubidium frequency standard enclosure

Posted on Wednesday, December 5th, 2012 in DIY, hacks by DP

Kenneth builds an enclosure and power supply for a “cheap” rubidium frequency standard. Rubidium standards are used for high precision clocks, and time keeping with a drift of only 6ms a year.

Normally, rubidium standards are very expensive, but it is possible to find these modules on eBay for $50-$100 as they come out of decommissioned equipment (such as cell phone towers, which need this level of time stability). On a hobbyist bench like my own, these standards are useful as a very good time base to calibrate other oscillators against.  They’re also useful because 10MHz is the standard time base used by bench test equipment, so this standard can be used to drive frequency counters and spectrum analyzers via their time base ports so that they are more precise than with their stock internal 10MHz oscillators.

This entry was posted on Wednesday, December 5th, 2012 at 1:00 pm and is filed under DIY, hacks. You can follow any responses to this entry through the RSS 2.0 feed. You can skip to the end and leave a response. Pinging is currently not allowed.

7 Responses to “Rubidium frequency standard enclosure”

  1. Michael says:

    What is PPL?
    Is that Phase Phock Loop?

  2. JBeale says:

    Nice enclosure! You can read more about these cheap rubidium standards at the wiki/FAQ I started on the ko4bb webpage; google for “fe5680a_faq”

  3. Robotguy says:

    Pulse Per Leapyear?

    Pizza Programming Language?

    http://www.onelook.com/?w=expand%3APPL&ls=a

  4. pietja says:

    Here you can see some thermal pictures of my rubidium frequency standard.
    http://dangerousprototypes.com/forum/viewtopic.php?f=2&t=3453&start=30#p35860
    Its the same model Kenneth haves.

Leave a Reply

Notify me of followup comments via e-mail. You can also subscribe without commenting.

Recent Comments

  • J. Peterson: Nice writeup. It looks like some of the formatting for your command examples needs some missing newlines?
  • Geert Jordaens: I'm not sure what kind of licensing I have to add since it is a fairly straight forward implementation of the adaptive Huffman Decoding. For...
  • erich: For anyone interested, I've added some c++ code for adaptive huffman decoding in the git repository.
  • Sjaak: I would add some more protection in the used trigger file (on the serverpilot site) then not using a standard name :) hopefully they use...
  • Pete Castagna: My friend Charlie who worked in synthesizers at a DOD type of place made a modification to this avalanche pulse generator that allowed him to...