[time-nuts] Is this a cesium frequency standard?

Azelio Boriani azelio.boriani at screen.it
Thu Aug 23 12:35:11 EDT 2012


Have you observed the hump yourself or is it published data? If you made
the measure, what reference clock did you use? I have (at work, in another
department) a new PRS10, hope to get it back...

On Thu, Aug 23, 2012 at 6:00 PM, Bill Dailey <docdailey at gmail.com> wrote:

> .... The PRS10 by SRS has serious shortcomings at short tau.  I don't
> understand why but there is a huge hump in the adev.  That's why I avoided
> one.
>
> Sent from my iPhone
>
> On Aug 23, 2012, at 10:42 AM, paul swed <paulswedb at gmail.com> wrote:
>
> > OK have been staying clear of the replies.
> > Thats a lot of money for a RB of who knows what age and no support.
> > Those are $25 value items you are taking all of the risks. And yes indeed
> > you can get RBs for $25 a bit low in the lamp life. But do rejuvenate
> > nicely. FRS class.
> >
> > Brand new ones I think from SRS are that cost, consume a fraction of the
> > power, great documentation, warranty, and modern control interfaces.
> > What on earth would shipping and customs be??
> > Cute boat anchor though a real waste of anything.
> > Regards
> > Paul
> > WB8TSL
> >
> > On Thu, Aug 23, 2012 at 11:32 AM, Michael Perrett <mkperrett at gmail.com
> >wrote:
> >
> >> I have found Google translate does a pretty good job on translating
> manuals
> >> - and it is free
> >> Michael
> >>
> >> On Thu, Aug 23, 2012 at 6:40 AM, Richard Parrish <calcntr at swbell.net>
> >> wrote:
> >>
> >>> The seller of the 'Russian' equipment said that the CCHB-74 frequency
> >>> standard is a rubidium unit.  Manual is in Russian but he can translate
> >>> part
> >>> of the manual into English for an additional fee.
> >>>
> >>> Thanks,
> >>> Richard Parrish
> >>> Cal Center Inc
> >>> 1622 Griffith Ave
> >>> Terrell, Texas 75160-4905
> >>> calcntr at swbell.net
> >>> 214-577-3515
> >>>
> >>> -----Original Message-----
> >>> From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com]
> On
> >>> Behalf Of David Kirkby
> >>> Sent: Thursday, August 23, 2012 3:18 AM
> >>> To: Discussion of precise time and frequency measurement
> >>> Subject: [time-nuts] Is this a cesium frequency standard?
> >>>
> >>> There's a seller on ebay by the name of
> >>> "electro-radio-device-high-precision", which have some odd things.
> >>> Some seem as if they would be 19th century items, but are sold as
> "new".
> >>>
> >>>
> >>>
> >>
> http://stores.ebay.co.uk/electro-radio-device-high-precision?_trksid=p4340.l
> >>> 2563
> >>>
> >>> I suspect his stuff was desgned for the Russian military. Everything he
> >>> sells is described as
> >>>
> >>> "analog of Lutron, Advantest, Avtech, HP Agilent, NoiseCom, General
> >> Radio,
> >>> Boonton, Anritsu, Fluke and general Electric, but  has the same or
> better
> >>> characteristics."
> >>>
> >>> I thought this one was interesting though
> >>>
> >>>
> >>>
> >>
> http://www.ebay.co.uk/itm/5MHz-1MHz-100kHz-Frequency-standard-CCHB-74-an-g-A
> >>> gilent-HP-/330758945645?pt=LH_DefaultDomain_0&hash=item4d02c4fb6d
> >>>
> >>> It has lots of knobs to twiddle, so it might be a cesium, though the
> >> specs
> >>> don't seem good enough for a cesium, with a relativa e error of
> >>> +/- 2 x 10^-11 at shipping. That seems more like a rubidium spec.
> >>>
> >>> He has some bizzare stuff, like a power meter which works to 53 GHz,
> but
> >>> has
> >>> banana plugs on it. I guess the sensor is connected to the banana
> plugs,
> >>> though he does not mention it needing an external sensor.
> >>>
> >>>
> >>>
> >>
> http://www.ebay.co.uk/itm/0-03GHz-53GHz-1mkWatt-10mWatt-Power-meter-M3-22-an
> >>>
> >>>
> >>
> -g-Agilent-HP-Marconi-GenRad-/230821610924?pt=LH_DefaultDomain_0&hash=item35
> >>> be0a45ac
> >>>
> >>> Some of his stuff seems very over priced, like a 400-1200 MHz sig gen
> >> with
> >>> an error of 1% for $1580, but other things seem quite reasonable.
> >>> If you need a sig gen at 70 GHz, he has them.
> >>>
> >>> Anyway, its worth checking out his auctions, as he has some test
> >> equipment
> >>> which is very different from what one normally sees - and it some cases
> >> to
> >>> what one would want to see!
> >>>
> >>> Dave
> >>>
> >>> _______________________________________________
> >>> 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.
> >>>
> >>>
> >>> _______________________________________________
> >>> 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.
> >>>
> >> _______________________________________________
> >> 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.
> >>
> > _______________________________________________
> > 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.
>
> _______________________________________________
> 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.
>



More information about the time-nuts mailing list