And there is your product. The GPSDO derived 44.1 kHz reference! I only ask for a 10% royalty.:)
On Jun 19, 2013, at 20:54, Tom Knox <[email protected]> wrote: > I wonder what is the best way to obtain 44.1KHz from a 5-10MHz reference. > > Thomas Knox > > > >> Date: Wed, 19 Jun 2013 15:14:17 -0600 >> From: [email protected] >> To: [email protected]; [email protected] >> Subject: Re: [time-nuts] [OT} audiophile outlets..... >> >> Rb or Cs locked 50/60 Hz AC power might still be an available niche >> although I didn't do much of a search. >> Alan >> >> >> On Wed, Jun 19, 2013 at 11:52 AM, J. Forster <[email protected]> wrote: >> >>> How about a Rb or Cs standard to control the sampling rate of the DACs in >>> your CD player so you always have perfect pitch and no wow or flutter? >>> >>> Oh, it's already being done and sold to Audiophools.... never mind! >>> >>> -John >>> >>> ================ >>> >>> >>>> Simple, just think of the next snake oil. There's always more. >>>> >>>> >>>> On 6/18/2013 10:33 PM, Brian, WA1ZMS wrote: >>>>> What's gets me is that I didn't think of this snake oil first. >>>>> Had I thought of it first I could own a PTI H-MASER by now. :- ) >>>>> >>>>> -Brian, WA1ZMS >>>>> >>>>> -----Original Message----- >>>>> From: [email protected] [mailto:[email protected]] On >>>>> Behalf Of Didier Juges >>>>> Sent: Tuesday, June 18, 2013 10:01 PM >>>>> To: [email protected]; Discussion of precise time and frequency >>>>> measurement >>>>> Subject: Re: [time-nuts] HP and other equipment failure >>>>> >>>>> "audiophile outlets" >>>>> >>>>> You've got to be kidding but not even. >>>>> >>>>> At least, nobody is forcing anybody to buy them... >>>>> >>>>> Didier >>>>> >>>>> Peter Gottlieb <[email protected]> wrote: >>>>> >>>>>> The current distortion from simple transformer-rectifier-capacitor >>>>>> power supplies contains a lot of third harmonic content. In a 3 phase >>>>>> system (as are all distribution systems for commercial and industrial) >>>>>> the third harmonic ADDS in the neutral, or creates circulating currents >>>>>> in a delta configuration. These currents, as you mention, can get very >>>>>> large and were the cause of many >>>>>> >>>>>> transformer explosions in cities as these power supplies became common. >>>>>> The >>>>>> transformer designs had to be improved, but the PFC supplies make a big >>>>>> difference. >>>>>> >>>>>> How many of you have looked at the power line waveform, especially in >>>>>> an industrial or commercial area? Doesn't look much like a sine wave, >>>>>> does it? So it's pretty funny to see audiophile outlets >>>>>> (http://www.dedicatedaudio.com/power_outlets). >>>>>> >>>>>> Peter >>>>>> >>>>>> >>>>>> >>>>>> >>>>>> On 6/15/2013 6:56 PM, stan, W1LE wrote: >>>>>>> PFC to me is power factor correction, not only the classical power >>>>>> factor to >>>>>>> minimize (VAR) volt-amp reactive component, but also to remove the >>>>>>> harmonic load current imposd on the >>>>>> electrical power >>>>>>> system. >>>>>>> A '90's onward technique. in th 80's and 90's without the harmonic >>>>>> load >>>>>>> current reduction and having >>>>>>> a few 100 end items of equipment, each withtheir own a switch mode >>>>>> power >>>>>>> supplly, >>>>>>> it was not uncommon to find hundreds of amps of the third harmonc on >>>>>> neutra, >>>>>>> in the electrical power distribution system. >>>>>>> >>>>>>> Could be a serious EMC problem if you were dealing with voice grade >>>>>> channels. >>>>>>> And people safety issues. >>>>>>> >>>>>>> Stan, W1LE Cape Cod >>>>>>> >>>>>>> >>>>>>> >>>>>>> On 15-Jun-13 5:52 PM, J. L. Trantham wrote: >>>>>>>> Sorry for the interruption but what is 'PFC'? >>>>>>>> >>>>>>>> Thanks. >>>>>>>> >>>>>>>> Joe >>>>>>>> >>>>>>>> -----Original Message----- >>>>>>>> From: [email protected] [mailto:[email protected]] >>>>>> On >>>>>>>> Behalf Of Poul-Henning Kamp >>>>>>>> Sent: Saturday, June 15, 2013 4:09 PM >>>>>>>> To: Robert Atkinson; Discussion of precise time and frequency >>>>>> measurement >>>>>>>> Cc: Perry Sandeen >>>>>>>> Subject: Re: [time-nuts] HP and other equipment failure >>>>>>>> >>>>>>>> In message >>>>>> <[email protected]>, >>>>>>>> Robert Atkinson writes: >>>>>>>> >>>>>>>>> While I agree with everything else you say, you CAN have too much >>>>>>>>> filter capacitance. At least where dc rectifier / filter >>>>>> (smoothing) >>>>>>>>> circuits are concerned. Increasing C causes increased ripple >>>>>> current >>>>>>>>> [...] >>>>>>>> And ripple current can be a major source of power-line frequency >>>>>> noise in >>>>>>>> all electronics. >>>>>>>> >>>>>>>> The main reason why switchmode power-supplies today (can) outperform >>>>>> linear >>>>>>>> power supplies with respect to noise, is because the legally >>>>>> mandated PFC >>>>>>>> correction eliminates the bridge-rectifier ripple harmonics. >>>>>>>> >>>>>>>> I would not hessitate to use a good quality switchmode to replace >>>>>> the linear >>>>>>>> supply in a HP5370B. >>>>>>>> >>>>>>>> I did some experiments a couple of years ago, with an >>>>>> audio-amplifier: >>>>>>>> I put a standard PFC corrector chip on the secondary side of the >>>>>> trafo. >>>>>>>> The overall result was not satisfactory, but the 50 Hz "sneer" >>>>>>>> we all know and hate was absent, and the "Tzoing!!!!!" power-on >>>>>> mechanical >>>>>>>> shock from the trafo was also eliminated, as was the consequent >>>>>> dimming of >>>>>>>> the lights ;-) >>>>>>>> >>>>>>>> The main reason not to do this, is that you need some physically >>>>>> gargantuan >>>>>>>> coils for a 10A+ PFC-switcher. >>>>>>> _______________________________________________ >>>>>>> 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. >>>>>>> >>>>>>> >>>>>>> ----- >>>>>>> No virus found in this message. >>>>>>> Checked by AVG - www.avg.com >>>>>>> Version: 10.0.1432 / Virus Database: 3199/5913 - Release Date: >>>>>> 06/15/13 >>>>>> _______________________________________________ >>>>>> 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. >>>>> -- >>>>> Sent from my Motorola Droid Razr 4G LTE wireless tracker while I do >>>>> other >>>>> things. >>>>> _______________________________________________ >>>>> 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. >>>>> >>>>> >>>>> ----- >>>>> No virus found in this message. >>>>> Checked by AVG - www.avg.com >>>>> Version: 10.0.1432 / Virus Database: 3199/5921 - Release Date: 06/18/13 >>>> >>>> _______________________________________________ >>>> 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.
