[time-nuts] [OT} audiophile outlets.....
bownes
bownes at gmail.com
Thu Jun 20 01:00:26 UTC 2013
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 <actast at hotmail.com> 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: alanh137 at gmail.com
>> To: jfor at quikus.com; time-nuts at febo.com
>> 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 <jfor at quikus.com> 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: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On
>>>>> Behalf Of Didier Juges
>>>>> Sent: Tuesday, June 18, 2013 10:01 PM
>>>>> To: nerd at verizon.net; 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 <nerd at verizon.net> 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: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com]
>>>>>> 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
>>>>>> <1371329221.83869.YahooMailNeo at web171902.mail.ir2.yahoo.com>,
>>>>>>>> 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 -- time-nuts at febo.com 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 -- time-nuts at febo.com 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 -- 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.
>>>>>
>>>>>
>>>>> -----
>>>>> 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 -- 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_lists.febo.com
mailing list