TV
Tom Van Baak
Thu, Jan 31, 2008 9:55 PM
There are good clocks and bad clocks. Most need power, one
needs food, another runs all by itself.
Take a trip across 15 orders of magnitude of clock performance:
http://www.leapsecond.com/ten/
/tvb
There are good clocks and bad clocks. Most need power, one
needs food, another runs all by itself.
Take a trip across 15 orders of magnitude of clock performance:
http://www.leapsecond.com/ten/
/tvb
SN
Scott Newell
Thu, Jan 31, 2008 10:20 PM
At 03:55 PM 1/31/2008, Tom Van Baak wrote:
Take a trip across 15 orders of magnitude of clock performance:
http://www.leapsecond.com/ten/
Fun! What piece of equipment is that Isotemp OCXO (page 28) used in?
--
newell N5TNL
At 03:55 PM 1/31/2008, Tom Van Baak wrote:
>Take a trip across 15 orders of magnitude of clock performance:
>
> http://www.leapsecond.com/ten/
Fun! What piece of equipment is that Isotemp OCXO (page 28) used in?
--
newell N5TNL
SR
Sylvain RICHARD
Thu, Jan 31, 2008 10:27 PM
There are good clocks and bad clocks. Most need power, one
needs food, another runs all by itself.
Take a trip across 15 orders of magnitude of clock performance:
http://www.leapsecond.com/ten/
/tvb
I must say the drip clock was very nice.
Re the mains frequency, I believe it changes with the load on the grid.
Do you have a record of this?
Sylvain
Tom Van Baak wrote:
> There are good clocks and bad clocks. Most need power, one
> needs food, another runs all by itself.
>
> Take a trip across 15 orders of magnitude of clock performance:
>
> http://www.leapsecond.com/ten/
>
> /tvb
>
I must say the drip clock was very nice.
Re the mains frequency, I believe it changes with the load on the grid.
Do you have a record of this?
Sylvain
RK
Rob Kimberley
Thu, Jan 31, 2008 10:37 PM
There are good clocks and bad clocks. Most need power, one
needs food, another runs all by itself.
Take a trip across 15 orders of magnitude of clock performance:
Excellent stuff Tom!
Best Rgds
Rob K
> There are good clocks and bad clocks. Most need power, one
> needs food, another runs all by itself.
>
> Take a trip across 15 orders of magnitude of clock performance:
Excellent stuff Tom!
Best Rgds
Rob K
JA
John Ackermann N8UR
Thu, Jan 31, 2008 10:52 PM
Very cool, Tom!
John
Tom Van Baak said the following on 01/31/2008 04:55 PM:
Very cool, Tom!
John
----
Tom Van Baak said the following on 01/31/2008 04:55 PM:
> There are good clocks and bad clocks. Most need power, one
> needs food, another runs all by itself.
>
> Take a trip across 15 orders of magnitude of clock performance:
>
> http://www.leapsecond.com/ten/
>
> /tvb
>
>
> _______________________________________________
> 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.
>
>
JM
Jeff Mock
Thu, Jan 31, 2008 11:07 PM
Very cool, Tom!
John
Tom Van Baak said the following on 01/31/2008 04:55 PM:
Very nice, it reminded me of a NYT article about a year ago that
describes "the long zoom" as one of the defining aspects of this generation:
http://www.nytimes.com/2006/10/08/magazine/08games.html?ei=5090&en=d551133c9414ebbd&ex=1317960000&partner=rssuserland&emc=rss&pagewanted=all
jeff
John Ackermann N8UR wrote:
> Very cool, Tom!
>
> John
> ----
>
> Tom Van Baak said the following on 01/31/2008 04:55 PM:
>> There are good clocks and bad clocks. Most need power, one
>> needs food, another runs all by itself.
>>
>> Take a trip across 15 orders of magnitude of clock performance:
>>
>> http://www.leapsecond.com/ten/
>>
>> /tvb
>>
>>
>> _______________________________________________
>> 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.
>>
>>
>
>
> _______________________________________________
> 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.
>
NM
Nic McLean
Thu, Jan 31, 2008 11:24 PM
Hi all,
Can anybody lead me to information on the Tracor 895A Linear Phase / Time
Comparator? A simple google search doesn't turn up much.
Regards,
Nic
Hi all,
Can anybody lead me to information on the Tracor 895A Linear Phase / Time
Comparator? A simple google search doesn't turn up much.
Regards,
Nic
MT
michael taylor
Thu, Jan 31, 2008 11:37 PM
Re the mains frequency, I believe it changes with the load on the grid.
Do you have a record of this?
I forget the reasoning for frequency variation, but it is load or
source related I believe. Part of the reason it
A project for a easy to build AC frequency measuring device:
http://www.sparetimegizmos.com/Hardware/AC_Monitor.htm
I could log the frequency deviations from my local AC mains if you
want some sample data.
On Jan 31, 2008 5:27 PM, Sylvain RICHARD <sr75pro@free.fr> wrote:
> >
> Re the mains frequency, I believe it changes with the load on the grid.
> Do you have a record of this?
I forget the reasoning for frequency variation, but it is load or
source related I believe. Part of the reason it
A project for a easy to build AC frequency measuring device:
<http://www.sparetimegizmos.com/Hardware/AC_Monitor.htm>
I could log the frequency deviations from my local AC mains if you
want some sample data.
SR
Sylvain RICHARD
Fri, Feb 1, 2008 12:25 AM
michael taylor a écrit :
On Jan 31, 2008 5:27 PM, Sylvain RICHARD [1]sr75pro@free.fr wrote:
Re the mains frequency, I believe it changes with the load on the grid.
Do you have a record of this?
I forget the reasoning for frequency variation, but it is load or
source related I believe. Part of the reason it
It is a balance between production and grid load. In the European case,
the grids are phase synchronous over several countries. The (oldish)
data I have is
- Nordel : Finland, Norway, Sweden, Denmark
- Uktsoa : UK.
- Atsoi : Irland
- Ucte : everybody else in Western Europe : Portugal, Spain, France,
Netherlands, Belgium, Luxembourg, Germany, Switzerland, Austria, Italy,
Czech Republic, Slovakia, Poland, Hungary, Romania, ex-Yougoslavia
During the 2006 blackout, the frequency went down by several hertz
before some customers were disconnected ("load shedding"). The so
familiar 50Hz line on VLF spectrograms took a dip.
A project for a easy to build AC frequency measuring device:
[2]http://www.sparetimegizmos.com/Hardware/AC_Monitor.htm
I could log the frequency deviations from my local AC mains if you
want some sample data.
This gadget looks nice, but I think I'll pass.
Good night
Sylvain
References
- mailto:sr75pro@free.fr
- http://www.sparetimegizmos.com/Hardware/AC_Monitor.htm
michael taylor a écrit :
On Jan 31, 2008 5:27 PM, Sylvain RICHARD [1]<sr75pro@free.fr> wrote:
Re the mains frequency, I believe it changes with the load on the grid.
Do you have a record of this?
I forget the reasoning for frequency variation, but it is load or
source related I believe. Part of the reason it
It is a balance between production and grid load. In the European case,
the grids are phase synchronous over several countries. The (oldish)
data I have is
- Nordel : Finland, Norway, Sweden, Denmark
- Uktsoa : UK.
- Atsoi : Irland
- Ucte : everybody else in Western Europe : Portugal, Spain, France,
Netherlands, Belgium, Luxembourg, Germany, Switzerland, Austria, Italy,
Czech Republic, Slovakia, Poland, Hungary, Romania, ex-Yougoslavia
During the 2006 blackout, the frequency went down by several hertz
before some customers were disconnected ("load shedding"). The so
familiar 50Hz line on VLF spectrograms took a dip.
A project for a easy to build AC frequency measuring device:
[2]<http://www.sparetimegizmos.com/Hardware/AC_Monitor.htm>
I could log the frequency deviations from my local AC mains if you
want some sample data.
This gadget looks nice, but I think I'll pass.
Good night
Sylvain
References
1. mailto:sr75pro@free.fr
2. http://www.sparetimegizmos.com/Hardware/AC_Monitor.htm
AM
Alan Melia
Fri, Feb 1, 2008 12:35 AM
Hi Nic these are difficult to find for free but Ridge Electronics have one
for Tracor 895 at $20. I just got a Montronics Freq Diff meter manual from
them.
Alan G3NYK
----- Original Message -----
From: "Nic McLean" mcleann@bigpond.com
To: "'Discussion of precise time and frequency measurement'"
time-nuts@febo.com
Sent: Thursday, January 31, 2008 11:24 PM
Subject: [time-nuts] Tracor 895A
Hi all,
Can anybody lead me to information on the Tracor 895A Linear Phase / Time
Comparator? A simple google search doesn't turn up much.
Regards,
Nic
time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to
and follow the instructions there.
Hi Nic these are difficult to find for free but Ridge Electronics have one
for Tracor 895 at $20. I just got a Montronics Freq Diff meter manual from
them.
Alan G3NYK
----- Original Message -----
From: "Nic McLean" <mcleann@bigpond.com>
To: "'Discussion of precise time and frequency measurement'"
<time-nuts@febo.com>
Sent: Thursday, January 31, 2008 11:24 PM
Subject: [time-nuts] Tracor 895A
> Hi all,
> Can anybody lead me to information on the Tracor 895A Linear Phase / Time
> Comparator? A simple google search doesn't turn up much.
> Regards,
> Nic
>
>
>
> _______________________________________________
> 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.
