Hi On a sweep generator with a magnet tuned YIG, supply ripple is a very common issue ….
Bob > On Dec 22, 2016, at 9:00 PM, n2lym <[email protected]> wrote: > > Hi Bob, > > I don't have issues at 60, 120, or 180Hz in a 60Hz country. Even with a 500KV > line a few thousand feet away. I can hear the corona on the ham bands at > times. > > > Mike > > > > > On Thu, Dec 22, 2016 at 05:15 PM, Bob Camp wrote: > >> Hi >> >> >> In a country with 50 Hz power lines, figuring out anything at 50, 100 or 150 >> Hz >> is going to be a bit exciting. >> >> Bob >> >>> On Dec 22, 2016, at 4:04 PM, n2lym wrote: >>> >>> Dave, >>> >>> Look at it with a narrow band SA and see if it's modulated by 100Hz. >>> >>> 73, >>> >>> Mike N2LYM >>> >>> >>> >>> >>> On Thu, Dec 22, 2016 at 07:39 AM, Dr. David Kirkby (Kirkby Microwave Ltd) >>> wrote: >>> >>>> On 22 December 2016 at 03:17, paul swed >>> wrote: >>>> >>>>> Dave Congratulations on 10 Ghz SSB. >>>>> >>>> >>>> This was not a QSO at all. It was simply a one way transmission from a >>>> signal generator at my end to a receiver at his end. No QSO was attempted. >>>> >>>> >>>>> Now to your question. I will fully believe you are seeing normal behavior >>>>> of the generators. Even if its dithering 100 Hz thats pretty amazing. >>>>> Sweep >>>>> gens simply are not stable enough for narrow work like you are trying. >>>>> Now I am sure comments will prove me totally wrong. >>>>> >>>> >>>> But I find it a bit odd that HP would have a 1 Hz software option on this >>>> instrument, if the instrument jumped up/down 100 Hz. >>>> >>>> Now I don't yet have the 1 Hz option programmed in, and it might well >>>> change the behavior completely, but I'd still like to find a way, if one >>>> exists, of checking this with the equipment I have. >>>> >>>> The signal generator is no longer supported, but I could try my luck seeing >>>> if there are any known problems with this unit, or firmware upgrades >>>> available - currently revision 29, May 1991. >>>> >>>> >>>> >>>>> But I don't think so. (Have been on 10G SSB over the years also. Only 60 >>>>> watts plus. Nothing fancy. ;-) ) >>>>> Regards >>>>> Paul >>>>> WB8TSL >>>>> >>>> >>>> 60 W is clearly some setup. I also know a lot of people run portable stuff >>>> on 10 GHz, where achieving frequency stability is more of a challenge, >>>> although less so with GPS. But this is a laboratory instrument, from a >>>> reputable manufacturer. I personally would not expected this behavior. I >>>> actually purchased this very cheaply (£650 GBP, which would have been about >>>> $900 at the time), but they are not cheap to buy now. >>>> >>>> >>>> Dave >>>> _______________________________________________ >>>> 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. >> >> _______________________________________________ >> 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. _______________________________________________ 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.
