Hi Chris!
I have a week's worth of data now... Take a look at these graphics
http://www.flickr.com/photos/miguelbarbosagoncalves/8955346508/ and
http://www.flickr.com/photos/miguelbarbosagoncalves/8955346522/
One of them shows is the plot of the loopstats of my stratum 1 server. The
other one
Hi David!
On 5 June 2013 06:58, David J Taylor david-tay...@blueyonder.co.uk wrote:
Miguel,
I notice a step in the blue (ntp02) graph in:
http://www.flickr.com/photos/**miguelbarbosagoncalves/**8955346508/http://www.flickr.com/photos/miguelbarbosagoncalves/8955346508/
and I think in
m...@mbg.pt said:
I believe something has happened but not on my side. The offset for ntp02
changed its sign but kept the absolute value.
That sort of change can happen when the routing changes. Keep watching and
see if it switches back or switches to yet another offset.
If you have
I have a spare new unused, fully populated, Version 2 Frequency Divider board
by Dave Partridge for sale. Price is $80 plus $5.85 shipping (my cost was
$98). Offering it here before placing on Ebay. Jim Robbins, N1JR
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While on this subject, if anyone should want me to, I am quite happy to put the
Gerbers for the PCB on my website.
Regards,
David Partridge
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf
Of James Robbins
Sent: 05 June 2013 13:06
To:
Fellow time-nuts,
There used to be a PDF around with details of pin-out and modifications
for the Z3815A. I fail to locate it at any of the usual places,
including google, Didier, TVB, Brooke etc...
I fail to find it in any of my archives as well.
I would appreciate if someone could share a
Hi
There are two very different 3815's out there. One comes in a nice box with
rational connectors on it. (They are expensive). The other one is the plug
in card that always seems to need a good scrub down. It appears to have the
same stuff but connecting to it is not easy. These are about 1/2 to
On 06/05/2013 11:16 PM, Bob Camp wrote:
Hi
There are two very different 3815's out there. One comes in a nice box with
rational connectors on it. (They are expensive). The other one is the plug
in card that always seems to need a good scrub down. It appears to have the
same stuff but connecting
Magnus, Just plug 18-60V into P10 (next to the GPS), Supposedly the input power
is steered by diodes so it is polarity insensitive.
Anyway, It's a standard connector, I am sure you have tons of them, On mine,
Pin 1 is wired to negative, Pin 2 to positive.
Pin2 is closest to the left edge looking
Talking about punishment, I pulled the old 9390 out yesterday and plugged it in.
Up the GPS came, but after 8 hours, still no lock LED.
(the lock LED is directly connected to Mr. Balls FRK).
So I thought, bugger, Well I have the Jig made up, I'll have a look at it on
the bench.
So I removed it
I think I have a acquaintance in USA that can maybe help but the
shipping is going to kill me to death..
More so than buying a bunch of never-ending projects?
One question -- it seemed that you had gotten to a place where the
(one of the?) 9390(s) seemed to be more or less working, but the
I hadn't thought about the uA739 for a while. It was one of the
original low-noise amps - we used to use it for phono preamps.
Re: glass piston caps, I have been able to sometimes get what I need
from Surplus Sales of Nebraska
I just got my Net4501 which I would like to turn into an NTP server. I saw
John's description, but at the moment, I would like to try without using the
high stability CPU oscillator option, just the PPS from one of my Thunderbolts.
Is that even worthwhile? Will the high resolution built-in
David wrote:
I hadn't thought about the uA739 for a while. It was one of the
original low-noise amps - we used to use it for phono preamps.
If you could live with the anemic output drive, they were great
opamps for the time. I preferred the 749, which had an
open-collector output (no 5k
On 6/5/2013 6:51 PM, Didier Juges wrote:
without using the high stability CPU oscillator option, just the PPS
from one of my Thunderbolts.
Is that even worthwhile? Will the high resolution built-in counters
of the Elan processor be useful without the external oscillator
compared to a plain
Hi
Well if the Z3815 boxes are all fakes, they did a *really* good job on making
up all the HP logo's and HP stickers. They even faked the right date codes for
the add on stickers. They also did a very nice job with the custom cables that
plug directly into everything.
Bob
On Jun 5, 2013,
shali...@gmail.com said:
I just got my Net4501 which I would like to turn into an NTP server. I saw
John's description, but at the moment, I would like to try without using the
high stability CPU oscillator option, just the PPS from one of my
Thunderbolts.
Is that even worthwhile? Will the
mi...@flatsurface.com said:
I haven't really looked into it further, there may be an NTP tweak which
forces a shorter time constant.
minpoll, maxpoll
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These are my opinions. I hate spam.
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To
On 6/5/2013 10:33 PM, Hal Murray wrote:
mi...@flatsurface.com said:
I haven't really looked into it further, there may be an NTP tweak which
forces a shorter time constant.
minpoll, maxpoll
Polling interval is different than update interval.
From a FAQ at ntp.org: Recent versions of ntpd
In real life all the users of your NTP server will be network connected.
So even if your server's offset stays within a picosecond you users have
to go over Ethernet to access it and in the end the time they get will have
microsecond level accuracy. So other than bragging rights what do you get
On 6/5/2013 11:14 PM, Chris Albertson wrote:
So other than bragging rights what do you get
with a picosecond level NTP server?
You're posting to the wrong list. :-)
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albertson.ch...@gmail.com said:
However if you can replace the CPU clock with a time nuts grade standards
referenced clock then the net4501 can be possibly one of the best NTP
servers out there. But this can be said about any computer. If you can
completely remove the temperature issue NTP
Bob, I am shocked! Are you Trolling?!
To Quote Stuart Cobb, posted to this very list on 29th May, 2013:
The Z3815A I got from China was in a different case, just two bent pieces
of sheet aluminum. The case _looks_ official, with the right label on the
front and silkscreen on the back. But
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