Hubert v. Bonhorst wrote:
Hi John,
How did you know the correct value for oven temperature? etc.
Regards
Hubert
I didn't do the install myself, but when you buy a new tube, the
appropriate values come with it. I think HP actually stamps the info
onto the tube label, but it doesn't look like F
measurement
Betreff: Re: AW: [time-nuts] Strange effect with C-Field change -- and a
bitofdata
Brooke Clarke wrote:
> John:
>
> Can you tell if just a raw tube was installed in you HP or is there a
> printed circuit board on the tube? A photo might be worth 1,000 words.
The retrofit kit is j
Brooke Clarke wrote:
John:
Can you tell if just a raw tube was installed in you HP or is there a
printed circuit board on the tube? A photo might be worth 1,000 words.
The retrofit kit is just the tube plus mounting hardware (it's
physically quite a bit smaller than the HP tube). There's no addi
Hi:
The FTS4060/S24 has a "package" that can be easily removed (a few bolts and
some coax and multipin connectors). The Cesium tube and a number of other circuit parts
are in this package.
The Cesium tube and what FTS calls an interface board bolted to it and that's
where all the wires from the
EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Im
Auftrag von John Ackermann N8UR
Gesendet: Sonntag, 27. März 2005 04:17
An: time-nuts
Betreff: Re: [time-nuts] Strange effect with C-Field change -- and a bit
ofdata
I did some testing today and I think that strange effect I saw was in
fact a cable proble
I'm very interested to see the instructions as well.
Please help
Hubert
-Ursprüngliche Nachricht-
Von: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Im
Auftrag von John Ackermann N8UR
Gesendet: Sonntag, 27. März 2005 04:17
An: time-nuts
Betreff: Re: [time-nuts] Strange effect with C-
frequency measurement
Betreff: Re: [time-nuts] Strange effect with C-Field change -- and a bit
ofdata
John Ackermann N8UR wrote:
> Chuck Harris wrote:
>
>> I remember reading an advertisement from FTS many moons ago that said
>> they
>> had for sale higher quality replacement
In message <[EMAIL PROTECTED]>, Chuck Harris writes:
>> Yes, in fact FTS (or Symmetricom or whatever they are this week) still
>> advertises their replacement tubes for the HP units. Interestingly,
>> they have an 8 year warranty, so FTS must have been able to improve the
>> reliability along
John Ackermann N8UR wrote:
Chuck Harris wrote:
I remember reading an advertisement from FTS many moons ago that said
they
had for sale higher quality replacement tubes for 5060's, 5061's, and
5062's.
Your replacement tube is most probably one of those tubes.
Remember, FTS was a direct competitor
Chuck Harris wrote:
I remember reading an advertisement from FTS many moons ago that said
they
had for sale higher quality replacement tubes for 5060's, 5061's, and
5062's.
Your replacement tube is most probably one of those tubes.
Remember, FTS was a direct competitor for HP's line of C-Beams,
I remember reading an advertisement from FTS many moons ago that said they
had for sale higher quality replacement tubes for 5060's, 5061's, and 5062's.
Your replacement tube is most probably one of those tubes.
Remember, FTS was a direct competitor for HP's line of C-Beams, and as such they
covete
I did some testing today and I think that strange effect I saw was in
fact a cable problem -- I couldn't reproduce exactly the same effect,
but in gently wiggling one of the cables to the counter I was able to
get some oddball readings.
A couple of unrelated points -- I wasn't sure about this,
Just wanted to mention that I've been making C-field adjustments on my
5061A for the
last few weeks while monitoring its performance vs. the Z3801A. I've
had quite a few
large ESD events after shuffling across the carpet and down the basement
stairs where
the discharge went directly to the C-fi
I had a similar experience about 2 weeks ago My (sirf chip set) gps lost
lock. It was in the afternoon around 1-3 pm I will have to check my logs
for the exact date and time.
The fed's like to jam gps from time to time around sensitive gov
installations the area can be quite large at high altitudes
Bill Hawkins wrote:
Well, if you figure out how to introduce a 100 mS delay with a
short length of cable, you should see a patent attorney.
Wait a minute. Aren't you using a homebrew divider to get 1 PPS
from the 5061? That's a fine way to get long lasting offsets, but
I can't imagine why it curved
ject: Re: [time-nuts] Strange effect with C-Field change
All --
Thanks for all the comments. It must be a slow afternoon/evening!!!
You've given me several things to check out. In addition, as I was
looking at the hardware in the basement I now have a suspicion that it
might be a cable pro
Doug Hogarth said,
"I don't know your particular GPS, but sure looks to me like GPS lost lock
(started drifting), then somehow got bad lock twice, before finally getting
proper lock. So I'd study GPS antenna/cable and receiver settings.
Consider adding logging of some GPS status, or at least try
All --
Thanks for all the comments. It must be a slow afternoon/evening!!!
You've given me several things to check out. In addition, as I was
looking at the hardware in the basement I now have a suspicion that it
might be a cable problem, specifically in the cable that goes from the
5061A PPS
Just because something isn't probable doesn't mean it isn't
possible. Given that the "normal" light was still on, either
the light logic is faulty or the 5061 never lost lock. That
leaves the GPS receiver, antenna and signal path. That it
happened at about the time the adjustment was moved could
be
I don't know your particular GPS, but sure looks to me like GPS lost lock
(started drifting), then somehow got bad lock twice, before finally getting
proper lock. So I'd study GPS antenna/cable and receiver settings.
Consider adding logging of some GPS status, or at least try to enable
setting for
Mike S wrote:
At 04:58 PM 3/24/2005, John Ackermann N8UR wrote...
That's a good hypothesis, but given how long this system (same receiver and antenna) has been running without ever encountering something like this makes me doubt it's a GPS anomaly, or at least a local one.
Were you talking
John Miles wrote:
How's the ESD environment in the room with your 5061A? Was there a spark
when your wife touched the knob (no double-entendre intended)?
-- john KE5FX
Har! Excellent thought, but I don't think ESD is likely, though it
can't be ruled out. The floor is linoleum over concrete b
At 04:58 PM 3/24/2005, John Ackermann N8UR wrote...
>That's a good hypothesis, but given how long this system (same receiver and
>antenna) has been running without ever encountering something like this makes
>me doubt it's a GPS anomaly, or at least a local one.
Were you talking your wife throug
2005 22:59
An: Discussion of precise time and frequency measurement
Betreff: Re: AW: AW: [time-nuts] Strange effect with C-Field change
Hubert v. Bonhorst wrote:
>Hi John,
>
>I saw similar outliers running especially Motorola GPS receivers in the
>vicinity to mobile telephones. Shie
> Hi Hubert --
>
> That's a good hypothesis, but given how long this system (same receiver
> and antenna) has been running without ever encountering something like
> this makes me doubt it's a GPS anomaly, or at least a local one. A long
> history has shown that this receiver/antenna very seldom
Hubert v. Bonhorst wrote:
Hi John,
I saw similar outliers running especially Motorola GPS receivers in the
vicinity to mobile telephones. Shielding is not sufficient. What I see in
your data plot is a drifting oscillator until the receiver tries to find a
new satellite configuration. (sudden jump
-nuts] Strange effect with C-Field change
Hubert v. Bonhorst wrote:
>If you disregard this excursion, what happened after the change. Did
>frequency change as expected? Would there have been continuity of data?
>Which TIC do you use? Which GPS receiver do you use? How many satellites
did
&
Hubert v. Bonhorst wrote:
If you disregard this excursion, what happened after the change. Did
frequency change as expected? Would there have been continuity of data?
Which TIC do you use? Which GPS receiver do you use? How many satellites did
you track? What is the minimum elevation for satellites
stupid questions, but
Hubert
DB7ME
-Ursprüngliche Nachricht-
Von: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Im
Auftrag von John Ackermann N8UR
Gesendet: Donnerstag, 24. März 2005 19:45
An: Discussion of precise time and frequency measurement
Betreff: [time-nuts] Strange effect with C
Poul-Henning Kamp wrote:
In message <[EMAIL PROTECTED]>, John Ackermann N8UR writes:
Anyway, has anyone seen anything like this, or have any idea what might
have happened here?
Did she leave the door open while she did the change
Good question, but there's no sign of a temperature chan
In message <[EMAIL PROTECTED]>, John Ackermann N8UR writes:
>Anyway, has anyone seen anything like this, or have any idea what might
>have happened here?
Did she leave the door open while she did the change ?
--
Poul-Henning Kamp | UNIX since Zilog Zeus 3.20
[EMAIL PROTECTED] | T
While I was out of town for the last week, I continued an experiment to
check the C-field sensitivity of my 5061A. I measured the offset at
C-field settings of 5.00, 5.50, and 4.50.
The last change was made while I was out of town. My wife, Jody, made
the change from 5.50 down to 4.50. She a
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