NTP Synchronised Nixie Tube Clock
At 07:22 PM 5/8/2007, Didier Juges wrote...
The page uses Javascript to instruct the browser to fetch the document
updated time stamp. It seems like your browser does not handle
Javascript the way it's intended. The way it's supposed to work: the
Javascript instructs the browser to fetch the document's time stamp
and
render it on the page. The browser is either ignoring the request and
putting some default value, or it does not fetch it properly and fails
to convert the date to a proper text string.
Actually, it appears to be a misconfiguration of your web site. It is
not returning Last-Modified: to an HTTP/1.1 request. Both a local site
and a different remote site I tested work fine.
On your site, Opera 9.2 always returns January 1, 1970 GMT. IE7 and
Firefox 2.0 always return the current time (the timestamp will change
each time the page is reloaded). IE/Firefox are simply using the Date:
response because the Last-Modified: response is missing.
A manual HTTP get from your site:
hamburg:/tmp# telnet www.ko4bb.com 80
Trying 203.22.204.117...
Connected to ko4bb.com.
Escape character is '^]'.
GET /ham_radio/Clock/ HTTP/1.1
Host: www.ko4bb.com
HTTP/1.1 200 OK
Date: Wed, 09 May 2007 00:47:29 GMT
Server: Apache/1.3.29 (Unix) FrontPage/5.0.2.2623
Vary: Host
Connection: close
Transfer-Encoding: chunked
Content-Type: text/html
9cc
<HTML> ...The Javascript works fine on a local web site. Manually doing an HTTP
get returns:
HTTP/1.1 200 OK
Date: Wed, 09 May 2007 00:36:40 GMT
Server: Apache/1.3.34 (Debian) PHP/4.4.4-8+etch2 mod_ssl/2.8.25
OpenSSL/0.9.8c
Last-Modified: Wed, 09 May 2007 00:27:51 GMT
ETag: "1a5846-611-46411587"
Accept-Ranges: bytes
Content-Length: 1553
Connection: close
Content-Type: text/html; charset=iso-8859-1
Also, a manual get from http://www.merlyn.demon.co.uk/last-mod.htm :
hamburg:/tmp# telnet www.merlyn.demon.co.uk 80
Trying 194.159.245.16...
Connected to service.homepages.demon.net.
Escape character is '^]'.
GET /last-mod.htm HTTP/1.1
Host: www.merlyn.demon.co.uk
HTTP/1.0 200 OK
Date: Wed, 09 May 2007 00:56:01 GMT
Server: thttpd/1.00.disbu
Content-type: text/html
Content-length: 6693
Last-modified: Sat, 31 Mar 2007 20:00:00 GMT
...
Just finished reading all of it; still have that feeling (Will Smith,
Independence Day) "I have go to get me one of these!"
What would really sweeten the deal; tube version of 10811 to go with it.
Phase locked of course! :)
Jack
-----Original Message-----
From: time-nuts-bounces@febo.com [mailto:time-nuts-bounces@febo.com] On
Behalf Of John Miles
Sent: Tuesday, May 08, 2007 7:59 PM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] NTP Synchronised Nixie Tube Clock
No kidding. That clock would be equally at home in "Blade Runner" or
"Triumph des Willens."
-- john, KE5FX
-----Original Message-----
From: time-nuts-bounces@febo.com [mailto:time-nuts-bounces@febo.com]On
Behalf Of Jack Hudler
Sent: Tuesday, May 08, 2007 5:37 PM
To: 'Discussion of precise time and frequency measurement'
Subject: Re: [time-nuts] NTP Synchronised Nixie Tube Clock
Now that's a thing of beauty!!!! It just went on my list of things to have
before I die!!! :)
time-nuts mailing list
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Just finished reading all of it; still have that feeling (Will Smith,
Independence Day) "I have go to get me one of these!"
What would really sweeten the deal; tube version of 10811 to go with it.
Phase locked of course! :)
Jack
I think all the old hp 100-series frequency standards were
tube based. Even the 100 kc crystal was mounted inside a
conventional vacuum tube. The old GR quartz standards had
tubes: http://www.leapsecond.com/museum/gr1103a/
So these would make a nice companion to that all tube nixie
tube clock.
The model hp 101A was hp's first "transistorized" standard;
after that came the 103 104 106 107 105 105-44 108-11
/tvb
Well, that is even more interesting! You are correct of course, I had
not noticed.
I use a commercial ISP and I will open a service ticket.
I developed the original format of the web site (including the little
bit of Javascript) on a local Linux box a number of moons ago and
transfered it to a commercial ISP that shall remain nameless. At the
time, that was working (maybe the only thing that was working with that
ISP...) When I got tired of that ISP and switched to my current ISP
(Globat) 3 or 4 years ago, I do not remember checking the time stamps.
My fault :-(
I do not know how long it's been like that.
Thanks for pointing that out.
Didier KO4BB
PS: just for grins, I copied the Clock/index.html page to my cox.net
webspace (which I do not normally use) and it returns the right date, so
the Javascript at least is still OK.
http://members.cox.net/didier/
Mike S wrote:
At 07:22 PM 5/8/2007, Didier Juges wrote...
The page uses Javascript to instruct the browser to fetch the document
updated time stamp. It seems like your browser does not handle
Javascript the way it's intended. The way it's supposed to work: the
Javascript instructs the browser to fetch the document's time stamp
and
render it on the page. The browser is either ignoring the request and
putting some default value, or it does not fetch it properly and fails
to convert the date to a proper text string.
Actually, it appears to be a misconfiguration of your web site. It is
not returning Last-Modified: to an HTTP/1.1 request. Both a local site
and a different remote site I tested work fine.
On your site, Opera 9.2 always returns January 1, 1970 GMT. IE7 and
Firefox 2.0 always return the current time (the timestamp will change
each time the page is reloaded). IE/Firefox are simply using the Date:
response because the Last-Modified: response is missing.
A manual HTTP get from your site:
hamburg:/tmp# telnet www.ko4bb.com 80
Trying 203.22.204.117...
Connected to ko4bb.com.
Escape character is '^]'.
GET /ham_radio/Clock/ HTTP/1.1
Host: www.ko4bb.com
HTTP/1.1 200 OK
Date: Wed, 09 May 2007 00:47:29 GMT
Server: Apache/1.3.29 (Unix) FrontPage/5.0.2.2623
Vary: Host
Connection: close
Transfer-Encoding: chunked
Content-Type: text/html
9cc
<HTML> ...The Javascript works fine on a local web site. Manually doing an HTTP
get returns:
HTTP/1.1 200 OK
Date: Wed, 09 May 2007 00:36:40 GMT
Server: Apache/1.3.34 (Debian) PHP/4.4.4-8+etch2 mod_ssl/2.8.25
OpenSSL/0.9.8c
Last-Modified: Wed, 09 May 2007 00:27:51 GMT
ETag: "1a5846-611-46411587"
Accept-Ranges: bytes
Content-Length: 1553
Connection: close
Content-Type: text/html; charset=iso-8859-1
Also, a manual get from http://www.merlyn.demon.co.uk/last-mod.htm :
hamburg:/tmp# telnet www.merlyn.demon.co.uk 80
Trying 194.159.245.16...
Connected to service.homepages.demon.net.
Escape character is '^]'.
GET /last-mod.htm HTTP/1.1
Host: www.merlyn.demon.co.uk
HTTP/1.0 200 OK
Date: Wed, 09 May 2007 00:56:01 GMT
Server: thttpd/1.00.disbu
Content-type: text/html
Content-length: 6693
Last-modified: Sat, 31 Mar 2007 20:00:00 GMT
...
time-nuts mailing list
time-nuts@febo.com
https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
I have an interesting 1MHz crystal that I got a number of years ago when I was
at the HP Santa Clara Division (Hertz Castle is what they called the place).
It is an HP P/N 5080-0031 1MHz crystal, gold plated, and in a glass vacuum tube.
I'll have to take a picture of it and post it... It's really quite pretty!
Daun
-----Original Message-----
From: time-nuts-bounces@febo.com [mailto:time-nuts-bounces@febo.com] On Behalf
Of Tom Van Baak
Sent: Tuesday, May 08, 2007 9:37 PM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] NTP Synchronised Nixie Tube Clock
Just finished reading all of it; still have that feeling (Will Smith,
Independence Day) "I have go to get me one of these!"
What would really sweeten the deal; tube version of 10811 to go with it.
Phase locked of course! :)
Jack
I think all the old hp 100-series frequency standards were
tube based. Even the 100 kc crystal was mounted inside a
conventional vacuum tube. The old GR quartz standards had
tubes: http://www.leapsecond.com/museum/gr1103a/
So these would make a nice companion to that all tube nixie
tube clock.
The model hp 101A was hp's first "transistorized" standard;
after that came the 103 104 106 107 105 105-44 108-11
/tvb
time-nuts mailing list
time-nuts@febo.com
https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
Tom Van Baak wrote,
I think all the old hp 100-series frequency standards were tube based.
Even the 100 kc crystal was mounted inside a conventional vacuum tube.
The old GR quartz standards had
tubes: http://www.leapsecond.com/museum/gr1103a/
So these would make a nice companion to that all tube nixie tube clock.
The model hp 101A was hp's first "transistorized" standard; after that
came the 103 104 106 107 105 105-44 108-11
/tvb
I have here an HP 100D 100 Kc standard in the Signal corps wooden box.
It uses several 6L6 tubes to regulate the oven temperature. Thought I'd
have fun restoring it, but my time is running out. $50 plus shipping,
with manual.
Bill Hawkins
In message: PKEGJHPHLLBACEOICCBJMEKENPAA.jmiles@pop.net
"John Miles" jmiles@pop.net writes:
: No kidding. That clock would be equally at home in "Blade Runner" or
: "Triumph des Willens."
Or add a Fresnel lens and pop that bad boy down inside of "Brazil."
Warner
Dear Pieter-Tjerk,
Nice to see your work on the Web! Two years ago I saw your neon-circuits
(counters, dividers etc) on the "Dag van de Amateur" (a Dutch
HAM-vention). Unfortunately you were not present at your display, but I
was very interested. Now I have a chance to have a close look at your
circuits!
73s Jeroen PE1RGE
Pieter-Tjerk de Boer wrote:
On Tue, May 08, 2007 at 02:09:53PM -0400, Maggie Leber wrote:
Perhaps my "hard core" requirement should be restated as "no
transistors" rather than "no semiconductors". :-)
In that case, I guess my clock also qualifies: it uses neon lamps
as its "active" components.
The only semiconductors used are simple diodes and two blue LEDs.
See http://wwwhome.cs.utwente.nl/~ptdeboer/ham/neonclock/ .
73, Pieter-Tjerk, PA3FWM
time-nuts mailing list
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--
Ing. Jeroen Bastemeijer
Delft University of Technology
Department of Electrical Engineering
Electronic Instrumentation Laboratory
Mekelweg 4, Room 13.090
2628 CD Delft
The Netherlands
Phone: +31.15.27.86542
Fax: +31.15.27.85755
E-mail: J.Bastemeijer@TUDelft.nl
GPS: Lat N52.00002 Lon E4.37157 Alt 46.2m
I took some pictures of my 1 MHz HP glass crystal.
You can see them here:
http://www.yeagley.net/Time-Nuts/
Daun
On Wed, 9 May 2007 09:29:58 -0400, "Daun Yeagley" daun@yeagley.net wrote:
I took some pictures of my 1 MHz HP glass crystal.
You can see them here:
I just tossed up a new page on my site showing another jewel - a Western Electric AM
transmitter and the jewel of a crystal oscillator it used.
http://www.neon-john.com/Misc/WE_Trans/WE_Index.htm
John
John De Armond
See my website for my current email address
http://www.neon-john.com
Cleveland, Occupied TN
Remember, Amateurs built the Ark. Professionals built the Titanic.