Having had more than ten FRK's and M100's on my bench and once locked none where as low as any thing in E-9. What you should buy is a ubox for $ 16 shipping included and you will with your counter be able to get better than 1 E-9 for testing. Bert Kehren In a message dated 8/10/2014 2:30:50 P.M. Eastern Daylight Time, [email protected] writes:
How did you make the measurement that showed a 0.8 Hz difference? What are the specs on your Racal reference? When was it calibrated and against what standard? That will tell you how much confidence to put in it's frequency. As others have said, an FRK isn't a primary standard and should be calibrated against a primary standard. However, 0.8 Hz is an error of 8e-8. I don't believe it's possible for a Rb standard to lock and be that far off. >From your web site you seem to have quite an assortment of HF radios. Do any of them have enough resolution to do a quick check by using one of them as a transfer standard? Measure a known-accurate radio station frequency and then measure both the Racal and the FRK. Ed On 8/10/2014 4:01 AM, Peter wrote: > > Thanks to the help from members here I now have a locking FRK. > > My bulb looked pretty clear, and i couldnt find any deposits or "bits" > inside, but decided to give it a good soaking at about 150 deg C using my > hot air re-work gun for about 10 mins. > > I have checked it against my Racal ovened reference and found a discrepancy > of about 0.8 Hz. > > Now the million dollar question...Can I be sure the FRK is good before I > start to use it as my standard frequency? > > Is the FRK constructed in such a way that the frequency accuracy is assured, > or do I need some way of verifying the FRK, or calibrating it. > > I dont want to trim my ovened reference to the rubidium, only to find the > rubidium is not as accurate as I thought? > > Sorry if dumb questions, but just starting my quest for "time nut" status!!! > > Thanks > > Peter > G0RSQ _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
