[time-nuts] Best Rubidium Frequency Standard

Rob Sherwood. rob at nc0b.com
Fri Mar 11 14:59:41 EST 2016


I have been running an M100 for over 15 years. It was NOS when I purchased it for $300.  Runs 24x7, and just keeps chugging along. 
Rob
NC0B

Sent from my iPad

> On Mar 11, 2016, at 10:01 AM, "timenut at metachaos.net" <timenut at metachaos.net> wrote:
> 
> 
> 
> Luciano,
> 
> Why? Why the Efratom FRK or M100 over the Efratom LPRO-101? The M100 appears
> to be manufactured in '91. Given the limited lifespan, why such an older
> choice? I didn't list the HP5065A because I didn't see it on eBay. What makes
> it better than the others? Why not one of the Symnmetricom versions (which
> also appear to be Datum / Efratom)?
> 
> Can the M100 be disciplined electronically? That wasn't clear from the eBay
> pictures that I saw. I also saw a 5Mhz and a 1Mhz version. Is one better than
> the other?
> 
> Thanks.
> 
> 
> Mike.
> 
> P.S. I have jury duty today and the Charlotte hamfest tomorrow, so I may not
> be online as often as usual for the next couple of days.
> 
> 
> 
>> Hi Mike,
> 
>> You have not mentioned the best Rubidium available, the HP5065A. Last week two of them are sold on ebay.
>> Second chose can be the Efratom FRK or M100, than all the others.
> 
>> Luciano
> 
> 
> 
> 
>> On Fri 11/03/16 12:02 , timenut at metachaos.net wrote:
> 
>>> Hi,
>>> 
>>> In looking at eBay, I current see quite a few different types of rubidium
>>> frequency standards. I have seen some of these mentioned here, but no real
>>> comparisions. The question, is what are the pros and cons of these
>>> specific
>>> models? Which ones are best or most reliable? Which ones cannot be
>>> disciplined
>>> by a GPS? Is there some specific ones I should never buy or others that I
>>> should stalk, waiting for one to show up? I know that some of these may be
>>> from the same company, but are typically listed differently. Here are some
>>> of
>>> the ones that I currently see on eBay. Also, is it worth it to buy "lot of
>>> 5"
>>> of "for parts or not working"? What is the likelyhood that at least one
>>> can be
>>> made to work? Thanks.
>>> 
>>> AT&T KS-23823 L2 Disciplined Rubidium Oscillator
>>> Datum Efatom LPRO-101
>>> EDIC Systems YP-1079B portable Rubidium Standard Oscillator
>>> Efatom FRS-A
>>> Efatom FRS-C
>>> Efatom M-100
>>> Efratom 2100-003 Rubidium Oscillator
>>> FE-1995A
>>> FE-5650A
>>> FE-5680A
>>> SRS TSD12
>>> SpectraTime SRO-100 GPS Synchronized Rubidium Frequency Standard
>>> Symmetricom 23478272-004-0-Stratum-2-Rubidium Clock
>>> Symmetricom Efatom SLCR=101
>>> Symmetricom SA.22c
>>> Symmetricom X72
>>> 
>>> Mike
>>> 
>>> _______________________________________________
>>> time-nuts mailing list -- time-nuts at febo.com
>>> To unsubscribe, go to
>>> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts [1]
>>> and follow the instructions there.
>>> 
>>> 
>>> 
>>> Links:
>>> ------
>>> [1]
>>> http://webmail.timeok.it/parse.php?redirect=https://www.febo.com/cgi-bin/ma
>>> ilman/listinfo/time-nuts
>> Message sent via Atmail Open - http://atmail.org/
> 
> 
> 
> -- 
> Best regards,
> Timenut                            mailto:timenut at metachaos.net
> 
> _______________________________________________
> time-nuts mailing list -- time-nuts at febo.com
> To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
> and follow the instructions there.
> 
> 
> 
> --
> If this email is spam, report it to
> https://support.onlymyemail.com/view/report_spam/ODExMjI6MTg2MTY3NzU0OTpyb2JAbmMwYi5jb206ZGVsaXZlcmVk
> 


More information about the time-nuts mailing list