Re: [time-nuts] PBS, Tue evening, The Secret of Tuxedo Park

[Joseph Gray]

I watched the episode with only a few minor buffering issues. Considering
that I couldn't watch it on live TV, and the web video was free, I didn't
find any reason to complain.

Joe Gray
W5JG


On Tue, Jan 16, 2018 at 10:21 PM, djl  wrote:

> pbs video player sucks big ones...
>
> On 2018-01-16 18:47, Joseph Gray wrote:
>
>> If you want to watch this episode online, go here:
>> http://video.unctv.org/video/3008204310
>>
>> This is the UNC Public TV web site.
>>
>> Joe Gray
>> W5JG
>>
>>
>>
>> On Tue, Jan 16, 2018 at 2:28 PM, Bill Tracey  wrote:
>>
>> To record OTA television I use an HDHomeRun :
>>> https://www.silicondust.com/hdhomerun/
>>>
>>> I'll grab tonight's run of The Secret of Tuxedo Park
>>>
>>> Cheers,
>>>
>>> Bill
>>>
>>> At 09:04 AM 1/16/2018, you wrote:
>>>
>>> I can't stress enough how important Loomis was to the history of precise
 timekeeping in early radio, telephone, pendulum clock, quartz oscillator
 era. And for those of us who still have Loran-C receivers can thank him
 (Loomis Radio Navigation -> LRN -> Loran).
 .

 If someone knows how to record any time/clock/navigation parts of PBS
 show for non-US viewers let me know, off-list.

 /tvb


>>> ___
>>> time-nuts mailing list -- time-nuts@febo.com
>>> To unsubscribe, go to https://www.febo.com/cgi-bin/m
>>> ailman/listinfo/time-nuts
>>> and follow the instructions there.
>>>
>>>
>>> ___
>> time-nuts mailing list -- time-nuts@febo.com
>> To unsubscribe, go to https://www.febo.com/cgi-bin/m
>> ailman/listinfo/time-nuts
>> and follow the instructions there.
>>
>
> --
> Dr. Don Latham
> PO Box 404, Frenchtown, MT, 59834
> VOX: 406-626-4304
>
> ___
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> ailman/listinfo/time-nuts
> and follow the instructions there.
>
>
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[time-nuts] LPFRS and LPRO signal breakout adapter

[Mark Sims]

I have completed a layout for the signal adapter board to connect an LPFRS or 
LPRO compatible  rubidium oscillator (or any general purpose Rb) to my X72 BNC 
connector/RS232 board
.  
The LPFRS is a small rubidium oscillator.  It is usually sold mounted on a 
heatsink with a small board that provides an LPRO compatible connector, except 
it replaces the lamp and xtal voltage monitoring pins with a serial interface.  

My interface board can replace the LPFRS board or it can be connected via the 
LPRO connectors.  It has support for an EFC voltage setting pot that provides 
0-5V  (or you can use the EFC input BNC on the connector board).  It also has a 
PICDIV chip for generating a 1PPS output.  When used with the LPRO or an 
oscillator that does not have a serial port (or you don''t want to use the 
LPFRS serial port) the board also has a place for a PICPET timestamping time 
interval counter chip.___
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and follow the instructions there.

Re: [time-nuts] PBS, Tue evening, The Secret of Tuxedo Park

[djl]

pbs video player sucks big ones...

On 2018-01-16 18:47, Joseph Gray wrote:

If you want to watch this episode online, go here:
http://video.unctv.org/video/3008204310

This is the UNC Public TV web site.

Joe Gray
W5JG



On Tue, Jan 16, 2018 at 2:28 PM, Bill Tracey  wrote:


To record OTA television I use an HDHomeRun :
https://www.silicondust.com/hdhomerun/

I'll grab tonight's run of The Secret of Tuxedo Park

Cheers,

Bill

At 09:04 AM 1/16/2018, you wrote:

I can't stress enough how important Loomis was to the history of 
precise
timekeeping in early radio, telephone, pendulum clock, quartz 
oscillator
era. And for those of us who still have Loran-C receivers can thank 
him

(Loomis Radio Navigation -> LRN -> Loran).
.

If someone knows how to record any time/clock/navigation parts of PBS
show for non-US viewers let me know, off-list.

/tvb



___
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ailman/listinfo/time-nuts
and follow the instructions there.



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and follow the instructions there.


--
Dr. Don Latham
PO Box 404, Frenchtown, MT, 59834
VOX: 406-626-4304

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Re: [time-nuts] PBS, Tue evening, The Secret of Tuxedo Park

[Joseph Gray]

If you want to watch this episode online, go here:
http://video.unctv.org/video/3008204310

This is the UNC Public TV web site.

Joe Gray
W5JG



On Tue, Jan 16, 2018 at 2:28 PM, Bill Tracey  wrote:

> To record OTA television I use an HDHomeRun :
> https://www.silicondust.com/hdhomerun/
>
> I'll grab tonight's run of The Secret of Tuxedo Park
>
> Cheers,
>
> Bill
>
> At 09:04 AM 1/16/2018, you wrote:
>
>> I can't stress enough how important Loomis was to the history of precise
>> timekeeping in early radio, telephone, pendulum clock, quartz oscillator
>> era. And for those of us who still have Loran-C receivers can thank him
>> (Loomis Radio Navigation -> LRN -> Loran).
>> .
>>
>> If someone knows how to record any time/clock/navigation parts of PBS
>> show for non-US viewers let me know, off-list.
>>
>> /tvb
>>
>
> ___
> time-nuts mailing list -- time-nuts@febo.com
> To unsubscribe, go to https://www.febo.com/cgi-bin/m
> ailman/listinfo/time-nuts
> and follow the instructions there.
>
>
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Re: [time-nuts] Time interval measurement vs dual mixer method

[Jerry Hancock]

I am working to build a small DMTD system based on Bill Riley’s paper.   Bill 
was kind enough to send me a package with updates.  In the meantime, I tested 
an AD8302 phase detector coupled to an HP voltmeter (HP3456 and HP3457), both 
with the filter set.  I believe the HP3456A voltmeter filter limits voltage 
changes to below 60hz.  The results were interesting but I don’t have anything 
to compare them with though they did look correct from a relative standpoint.  
For instance, my Cs beam looked better than one Rb unit and my GPSDOs looked 
better at longer Tau.  My HP 10811 looked correct when compared to others.

The issue with the AD8302 though is that phase deltas below 3 degrees are 
inaccurate, actually the plots had flats at those phase deltas.  Also, since it 
reports in degrees, you need to change that back to time which I did in a 
spreadsheet.  

Regards,

Jerry


Jerry Hancock
je...@hanler.com
(415) 215-3779

> On Jan 16, 2018, at 8:58 AM, slawek dabrowski  wrote:
> 
> 
> Hello to the group!
> 
> Have you ever measured frequency standard (or other precision oscillator) 
> simultanously by time interval method (difference between 1 pps ref and 1 pps 
> DUT) and dual mixer method (e.q. with phase/frequency comparator)? I'm very 
> interested in results.
> 
> Slawek
> 
> 
> 
> 
> 
> 
> ___
> time-nuts mailing list -- time-nuts@febo.com
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Re: [time-nuts] Time interval measurement vs dual mixer method

[Bob kb8tq]

Hi

You have to measure two different outputs to do what you describe. The PPS 
measurements 
are limited to > 1 x10^-10 with most counters at tau = 1 second and 2x10^-11 
with some exotic
models. The mixer based stuff can get around three orders of magnitude past 
that at the same
tau. Since a practical mixer system involves filtering one would expect some 
impact from that. 
The gotcha is the low resolution of the counter approach. You run out of 
resolution before you
can really see anything. 

All that said, yes, I have measured the same device both ways and the results 
do agree 
within the accuracy constraints imposed by the techniques. 

Bob

> On Jan 16, 2018, at 11:58 AM, slawek dabrowski  wrote:
> 
> 
> Hello to the group!
> 
> Have you ever measured frequency standard (or other precision oscillator) 
> simultanously by time interval method (difference between 1 pps ref and 1 pps 
> DUT) and dual mixer method (e.q. with phase/frequency comparator)? I'm very 
> interested in results.
> 
> Slawek
> 
> 
> 
> 
> 
> 
> ___
> time-nuts mailing list -- time-nuts@febo.com
> To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
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Re: [time-nuts] PBS, Tue evening, The Secret of Tuxedo Park

[Dana Whitlow]

I could only afford a single Accutron, so I got in the habit of storing it
overnight in an orientation
estimated to correct bedtime error by wake up time.  I got pretty good at
it.

BTW thanks very much for the tip on the book- I must definitely get a copy.

Dana


On Tue, Jan 16, 2018 at 9:04 AM, Tom Van Baak  wrote:

> I can't stress enough how important Loomis was to the history of precise
> timekeeping in early radio, telephone, pendulum clock, quartz oscillator
> era. And for those of us who still have Loran-C receivers can thank him
> (Loomis Radio Navigation -> LRN -> Loran).
>
> So I highly recommend the 2003 book "Tuxedo Park" by Jennet Conant:
> http://www.simonandschuster.com/books/Tuxedo-Park/Jennet-
> Conant/9780684872889
>
> Our kind of guy. In the "Palace of Science" chapter she writes: Loomis
> would remain a "time nut" for the rest of his life, according to Luis
> Alvarez, who recalled that Loomis always wore "two Accutrons--one on his
> right wrist and one on his left wrist." He would check them every day
> against WWV (the standard frequency broadcasting station of the National
> Bureau of Standards), and if one was gaining a half second on the other, he
> would wear it on the outside of his wrist instead of the inside, so that
> gravity changed the rate of the tuning fork and the two watches tracked
> each other, and WWV, "to within less than a second a day."
>
>
>
> Some other Loomis links of interest:
>
> https://en.wikipedia.org/wiki/Alfred_Lee_Loomis
> https://en.wikipedia.org/wiki/LORAN
> https://timeandnavigation.si.edu/navigating-air/navigation-
> at-war/new-era-in-time-and-navigation/alfred-loomis
> http://www.ob-ultrasound.net/loomis.html
> http://leapsecond.com/pages/loomis/
>
>
> And the clever way to do time transfer and compare precision clocks to 1
> ms in the 1930's...
>
> http://leapsecond.com/pend/shortt/1931-RAS-Precise-
> Measurement-Time-Loomis.pdf
>
>
> Also the classic "The Evolution of the Quartz Crystal Clock" by Warren A.
> Marrison:
>
> https://ieee-uffc.org/about-us/history/uffc-s-history/the-
> evolution-of-the-quartz-crystal-clock/
> via https://ieee-uffc.org/about-us/history/uffc-s-history/
> and original at https://archive.org/details/bstj27-3-510
>
>
> If someone knows how to record any time/clock/navigation parts of PBS show
> for non-US viewers let me know, off-list.
>
> /tvb
>
>
> - Original Message -
> From: "Hal Murray" 
> To: 
> Cc: "Hal Murray" 
> Sent: Tuesday, January 16, 2018 1:42 AM
> Subject: [time-nuts] PBS, Tue evening, The Secret of Tuxedo Park
>
>
> > (Sorry for the clutter to those of you outside the US.)
> >
> > http://www.pbs.org/wgbh/americanexperience/films/secret-tuxedo-park/
> > Two of the shorts mentions time.
> >
> > Many thanks for the Tuxedo Park book suggestion many years ago.
> >
> >
> > --
> > These are my opinions.  I hate spam.
> >
>
> ___
> time-nuts mailing list -- time-nuts@febo.com
> To unsubscribe, go to https://www.febo.com/cgi-bin/
> mailman/listinfo/time-nuts
> and follow the instructions there.
>
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[time-nuts] Time interval measurement vs dual mixer method

[slawek dabrowski]

Hello to the group!

Have you ever measured frequency standard (or other precision oscillator) 
simultanously by time interval method (difference between 1 pps ref and 1 pps 
DUT) and dual mixer method (e.q. with phase/frequency comparator)? I'm very 
interested in results.

Slawek


 



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Re: [time-nuts] PBS, Tue evening, The Secret of Tuxedo Park

[Bill Tracey]

To record OTA television I use an HDHomeRun : 
https://www.silicondust.com/hdhomerun/


I'll grab tonight's run of The Secret of Tuxedo Park

Cheers,

Bill

At 09:04 AM 1/16/2018, you wrote:
I can't stress enough how important Loomis was to the history of 
precise timekeeping in early radio, telephone, pendulum clock, 
quartz oscillator era. And for those of us who still have Loran-C 
receivers can thank him (Loomis Radio Navigation -> LRN -> Loran).

.

If someone knows how to record any time/clock/navigation parts of 
PBS show for non-US viewers let me know, off-list.


/tvb


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Re: [time-nuts] PBS, Tue evening, The Secret of Tuxedo Park

[paul swed]

Hello to the group.
I did read the book several years ago. Its quite good and I had no idea
about any of this.
Sort of amazing.
So the fact that PBS is doing a show on this is going to be good to watch
tonight.
Thank you for sharing.
Regards
Paul
WB8TSL

On Tue, Jan 16, 2018 at 1:08 PM, Azelio Boriani 
wrote:

> >>...he would wear it on the outside of his wrist instead of the inside,
> so that gravity changed the rate of the tuning fork...
> Sort of manual turbillon...
>
> On Tue, Jan 16, 2018 at 4:04 PM, Tom Van Baak  wrote:
> > I can't stress enough how important Loomis was to the history of precise
> timekeeping in early radio, telephone, pendulum clock, quartz oscillator
> era. And for those of us who still have Loran-C receivers can thank him
> (Loomis Radio Navigation -> LRN -> Loran).
> >
> > So I highly recommend the 2003 book "Tuxedo Park" by Jennet Conant:
> > http://www.simonandschuster.com/books/Tuxedo-Park/Jennet-
> Conant/9780684872889
> >
> > Our kind of guy. In the "Palace of Science" chapter she writes: Loomis
> would remain a "time nut" for the rest of his life, according to Luis
> Alvarez, who recalled that Loomis always wore "two Accutrons--one on his
> right wrist and one on his left wrist." He would check them every day
> against WWV (the standard frequency broadcasting station of the National
> Bureau of Standards), and if one was gaining a half second on the other, he
> would wear it on the outside of his wrist instead of the inside, so that
> gravity changed the rate of the tuning fork and the two watches tracked
> each other, and WWV, "to within less than a second a day."
> >
> >
> >
> > Some other Loomis links of interest:
> >
> > https://en.wikipedia.org/wiki/Alfred_Lee_Loomis
> > https://en.wikipedia.org/wiki/LORAN
> > https://timeandnavigation.si.edu/navigating-air/navigation-
> at-war/new-era-in-time-and-navigation/alfred-loomis
> > http://www.ob-ultrasound.net/loomis.html
> > http://leapsecond.com/pages/loomis/
> >
> >
> > And the clever way to do time transfer and compare precision clocks to 1
> ms in the 1930's...
> >
> > http://leapsecond.com/pend/shortt/1931-RAS-Precise-
> Measurement-Time-Loomis.pdf
> >
> >
> > Also the classic "The Evolution of the Quartz Crystal Clock" by Warren
> A. Marrison:
> >
> > https://ieee-uffc.org/about-us/history/uffc-s-history/the-
> evolution-of-the-quartz-crystal-clock/
> > via https://ieee-uffc.org/about-us/history/uffc-s-history/
> > and original at https://archive.org/details/bstj27-3-510
> >
> >
> > If someone knows how to record any time/clock/navigation parts of PBS
> show for non-US viewers let me know, off-list.
> >
> > /tvb
> >
> >
> > - Original Message -
> > From: "Hal Murray" 
> > To: 
> > Cc: "Hal Murray" 
> > Sent: Tuesday, January 16, 2018 1:42 AM
> > Subject: [time-nuts] PBS, Tue evening, The Secret of Tuxedo Park
> >
> >
> >> (Sorry for the clutter to those of you outside the US.)
> >>
> >> http://www.pbs.org/wgbh/americanexperience/films/secret-tuxedo-park/
> >> Two of the shorts mentions time.
> >>
> >> Many thanks for the Tuxedo Park book suggestion many years ago.
> >>
> >>
> >> --
> >> These are my opinions.  I hate spam.
> >>
> >
> > ___
> > time-nuts mailing list -- time-nuts@febo.com
> > To unsubscribe, go to https://www.febo.com/cgi-bin/
> mailman/listinfo/time-nuts
> > and follow the instructions there.
> ___
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> To unsubscribe, go to https://www.febo.com/cgi-bin/
> mailman/listinfo/time-nuts
> and follow the instructions there.
>
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Re: [time-nuts] PBS, Tue evening, The Secret of Tuxedo Park

[Azelio Boriani]

>>...he would wear it on the outside of his wrist instead of the inside, so 
>>that gravity changed the rate of the tuning fork...
Sort of manual turbillon...

On Tue, Jan 16, 2018 at 4:04 PM, Tom Van Baak  wrote:
> I can't stress enough how important Loomis was to the history of precise 
> timekeeping in early radio, telephone, pendulum clock, quartz oscillator era. 
> And for those of us who still have Loran-C receivers can thank him (Loomis 
> Radio Navigation -> LRN -> Loran).
>
> So I highly recommend the 2003 book "Tuxedo Park" by Jennet Conant:
> http://www.simonandschuster.com/books/Tuxedo-Park/Jennet-Conant/9780684872889
>
> Our kind of guy. In the "Palace of Science" chapter she writes: Loomis would 
> remain a "time nut" for the rest of his life, according to Luis Alvarez, who 
> recalled that Loomis always wore "two Accutrons--one on his right wrist and 
> one on his left wrist." He would check them every day against WWV (the 
> standard frequency broadcasting station of the National Bureau of Standards), 
> and if one was gaining a half second on the other, he would wear it on the 
> outside of his wrist instead of the inside, so that gravity changed the rate 
> of the tuning fork and the two watches tracked each other, and WWV, "to 
> within less than a second a day."
>
>
>
> Some other Loomis links of interest:
>
> https://en.wikipedia.org/wiki/Alfred_Lee_Loomis
> https://en.wikipedia.org/wiki/LORAN
> https://timeandnavigation.si.edu/navigating-air/navigation-at-war/new-era-in-time-and-navigation/alfred-loomis
> http://www.ob-ultrasound.net/loomis.html
> http://leapsecond.com/pages/loomis/
>
>
> And the clever way to do time transfer and compare precision clocks to 1 ms 
> in the 1930's...
>
> http://leapsecond.com/pend/shortt/1931-RAS-Precise-Measurement-Time-Loomis.pdf
>
>
> Also the classic "The Evolution of the Quartz Crystal Clock" by Warren A. 
> Marrison:
>
> https://ieee-uffc.org/about-us/history/uffc-s-history/the-evolution-of-the-quartz-crystal-clock/
> via https://ieee-uffc.org/about-us/history/uffc-s-history/
> and original at https://archive.org/details/bstj27-3-510
>
>
> If someone knows how to record any time/clock/navigation parts of PBS show 
> for non-US viewers let me know, off-list.
>
> /tvb
>
>
> - Original Message -
> From: "Hal Murray" 
> To: 
> Cc: "Hal Murray" 
> Sent: Tuesday, January 16, 2018 1:42 AM
> Subject: [time-nuts] PBS, Tue evening, The Secret of Tuxedo Park
>
>
>> (Sorry for the clutter to those of you outside the US.)
>>
>> http://www.pbs.org/wgbh/americanexperience/films/secret-tuxedo-park/
>> Two of the shorts mentions time.
>>
>> Many thanks for the Tuxedo Park book suggestion many years ago.
>>
>>
>> --
>> These are my opinions.  I hate spam.
>>
>
> ___
> time-nuts mailing list -- time-nuts@febo.com
> To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
> and follow the instructions there.
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Re: [time-nuts] Some HP 10811 05071-60219 info!

[Eric Scace]

   “Wavy lockwashers” are actually a form of spring washer known as a — wait 
for it — “wave washer”.

   General design considerations and information here. 
 
Grainger and many others carry stock.

— Eric

> On 2018 Jan 16, at 12:19 ,   wrote:
> 
> Hi,
> 
> Attached is a schematic of the changes made to the stock 10811 for use in
> the HP 5071A.
> 
> Also while I recently had two of them opened I noticed wavy lockwashers
> under the nut attaching the tuning capacitor. If you have ever had to
> open one up to retighten this nut you would wish all of them had the
> lockwasher!
> 
> Cheers,
> 
> Corby<5071aefc.png>___
> time-nuts mailing list -- time-nuts@febo.com
> To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
> and follow the instructions there.



signature.asc
Description: Message signed with OpenPGP
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[time-nuts] Some HP 10811 05071-60219 info!

[cdelect]

Hi,

Attached is a schematic of the changes made to the stock 10811 for use in
the HP 5071A.

Also while I recently had two of them opened I noticed wavy lockwashers
under the nut attaching the tuning capacitor. If you have ever had to
open one up to retighten this nut you would wish all of them had the
lockwasher!

Cheers,

Corby___
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Re: [time-nuts] PBS, Tue evening, The Secret of Tuxedo Park

[Tom Van Baak]

I can't stress enough how important Loomis was to the history of precise 
timekeeping in early radio, telephone, pendulum clock, quartz oscillator era. 
And for those of us who still have Loran-C receivers can thank him (Loomis 
Radio Navigation -> LRN -> Loran).

So I highly recommend the 2003 book "Tuxedo Park" by Jennet Conant:
http://www.simonandschuster.com/books/Tuxedo-Park/Jennet-Conant/9780684872889

Our kind of guy. In the "Palace of Science" chapter she writes: Loomis would 
remain a "time nut" for the rest of his life, according to Luis Alvarez, who 
recalled that Loomis always wore "two Accutrons--one on his right wrist and one 
on his left wrist." He would check them every day against WWV (the standard 
frequency broadcasting station of the National Bureau of Standards), and if one 
was gaining a half second on the other, he would wear it on the outside of his 
wrist instead of the inside, so that gravity changed the rate of the tuning 
fork and the two watches tracked each other, and WWV, "to within less than a 
second a day."



Some other Loomis links of interest:

https://en.wikipedia.org/wiki/Alfred_Lee_Loomis
https://en.wikipedia.org/wiki/LORAN
https://timeandnavigation.si.edu/navigating-air/navigation-at-war/new-era-in-time-and-navigation/alfred-loomis
http://www.ob-ultrasound.net/loomis.html
http://leapsecond.com/pages/loomis/


And the clever way to do time transfer and compare precision clocks to 1 ms in 
the 1930's...

http://leapsecond.com/pend/shortt/1931-RAS-Precise-Measurement-Time-Loomis.pdf


Also the classic "The Evolution of the Quartz Crystal Clock" by Warren A. 
Marrison:

https://ieee-uffc.org/about-us/history/uffc-s-history/the-evolution-of-the-quartz-crystal-clock/
via https://ieee-uffc.org/about-us/history/uffc-s-history/
and original at https://archive.org/details/bstj27-3-510


If someone knows how to record any time/clock/navigation parts of PBS show for 
non-US viewers let me know, off-list.

/tvb


- Original Message - 
From: "Hal Murray" 
To: 
Cc: "Hal Murray" 
Sent: Tuesday, January 16, 2018 1:42 AM
Subject: [time-nuts] PBS, Tue evening, The Secret of Tuxedo Park


> (Sorry for the clutter to those of you outside the US.)
> 
> http://www.pbs.org/wgbh/americanexperience/films/secret-tuxedo-park/
> Two of the shorts mentions time.
> 
> Many thanks for the Tuxedo Park book suggestion many years ago.
> 
> 
> -- 
> These are my opinions.  I hate spam.
> 

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[time-nuts] PBS, Tue evening, The Secret of Tuxedo Park

[Hal Murray]

(Sorry for the clutter to those of you outside the US.)

http://www.pbs.org/wgbh/americanexperience/films/secret-tuxedo-park/
Two of the shorts mentions time.

Many thanks for the Tuxedo Park book suggestion many years ago.


-- 
These are my opinions.  I hate spam.



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