of precise time and frequency measurement
Subject: Re: [time-nuts] Lady Heather numbers
Bob,
Took your advice and ordered another OCXO. While waiting for it I decided to
cut open the
OCXO with a bad heater that came with the thunderbolt. I found the 1 ohm
resistor from the
12 volt pin to the heater
I did see those photos. They gave me confidence to cut it open to see if there
was
anything I could do to fix it.
Garren
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf
Of Arthur Dent
Sent: Tuesday, March 12, 2013 2:16 PM
To:
Do you think that the oven is working correctly? Is the DC current high
on power-up then dropping to a steady lower value after warm-up time?
My concern is that the resistors may have unsoldered themselves because
the oven ran away into an over-temp condition.
On 3/12/2013 9:55 AM, Garren
4:35 PM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] Lady Heather numbers
Do you think that the oven is working correctly? Is the DC current high on
power-up then dropping to a steady lower value after warm-up time?
My concern is that the resistors may have
Hi
If the oven runs away, you won't get the nice DAC voltage settling to a
reasonable value trace on LH. If it has run away, the appearance is very
distinctive when you open it up. Boards turned brown and highly oxidized solder
….
Bob
On Mar 12, 2013, at 7:35 PM, Rex r...@sonic.net wrote:
I am not convinced the temperature control in mine is functional. For example,
the temperature target seems to not do anything at all. With the box insulated
the internal temperature is around 46 C and nothing changes if I set that number
to 40 or 50 C, it is still around that 46 plus or minus
Hi Peter,
first of all, LH can only 'control' temperature, if it has a hand to do
so.. meaning it can steer the RTS line of the RS232 to control a small
fan via PWM. Actually, it could also heat (by putting there a heating
element) but I haven't seen anybody doing it yet. If there is no
Peter wrote:
I am not convinced the temperature control in mine is functional.
Temperature control is a capability within Lady Heather (not the
Tbolt itself) and requires external hardware (e.g., box and fan) to implement.
Best regards,
Charles
Yeah, that sort of hit me after reading through the code. I enabled the control
lines in my serial to IP adapter and will hook up a fan in the box setup and see
if I can things to be more stable.
On 3/8/2013 6:11 PM, Charles P. Steinmetz wrote:
Peter wrote:
I am not convinced the
Hi Garren,
just as an example, what can be done with the LH internal temperature
controller:
http://gulp.physik.uzh.ch/heather/
Hardware pictures can be found here:
http://gulp.physik.uzh.ch/heather/pics/
Achim
___
time-nuts mailing list --
Achim,
Did you change any temperature controller settings from default values? I am
seeing about a 10:1 correspondence between ambient changes and internal reported
temperature movement.
Peter
On 3/7/2013 12:32 PM, Achim Vollhardt wrote:
Hi Garren,
just as an example, what can be done
Peter,
I did let the internal algorithm make it's optimization (can't remembere
which key sequence it was) once everything has settled. The lab here has
2-3 degC ambient variations over the day, but putting the Thunderbolt in
a box which is ventilated (well.. fan-ed) by the LH temperature
: Tuesday, March 05, 2013 11:04 AM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] Lady Heather numbers
I think I have my temperature problem fixed. I have included a 24 hour
graph. Comments welcomed.
I also did a 48 hour survey. I have more things I'm going
] On Behalf
Of Bob Camp
Sent: Tuesday, March 05, 2013 9:01 AM
To: 'Discussion of precise time and frequency measurement'
Subject: Re: [time-nuts] Lady Heather numbers
Hi
Your dac voltage is still swinging 20 to 25 mV over the period (4 to 5
divisions at 5,000 uV per division). It tracks the temperature
Hi
Get a new OCXO
Bob
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of Garren Davis
Sent: Tuesday, March 05, 2013 4:39 PM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] Lady Heather numbers
Thanks
Garren wrote:
Can anyone tell me how to turn off the satellite display on the
lower right of the display?
In the Graph menu (type g), you have three choices for displaying
the ADEV tables and/or the satellite map: ADEV tables only (type
a), Map only (type m), or Both (type b). You are now
I finally got the antenna outside, but just onto a deck railing and not yet up
high on the roof. Before I do that, does it look like I'm getting decent
performance from it? Here is the LH display:
Once up on the roof the Westerly exposure will be improved, but North East and
South are
Hi
If there was a file / image attached , it didn't make it through. North doesn't
matter much, South is a very big deal. That of course assumes you are in the US
or Europe.
Bob
On Mar 2, 2013, at 9:45 PM, Peter Gottlieb n...@verizon.net wrote:
I finally got the antenna outside, but just
Typical, the image didn't go through. Here is a link to it:
http://petergottlieb.com/images/tbolt.gif
On 3/2/2013 9:45 PM, Peter Gottlieb wrote:
I finally got the antenna outside, but just onto a deck railing and not yet up
high on the roof. Before I do that, does it look like I'm getting
Hi
As much as can be told from a 17 minute plot - looks ok. The antenna could
indeed be a bit higher and that would hopefully take care of the crummy sat c/n
numbers. What kind of feed line / antenna are you using? Cable TV RG-6 quad
shield from your local big box store is a real good choice
The antenna has a pretty clear sky view right now. I have about 75 feet of
cable, 25 feet that came attached permanently to the antenna, might be RG-59,
and a 50 foot extension which is a new piece of good quality RG-6 CATV cable.
Perhaps the antenna (came with the tbolt in the ebay deal) is
Peter wrote:
The antenna has a pretty clear sky view right now. I have about 75
feet of cable, 25 feet that came attached permanently to the
antenna, might be RG-59, and a 50 foot extension which is a new
piece of good quality RG-6 CATV cable.
Perhaps the antenna (came with the tbolt in
On Sat, Mar 2, 2013 at 7:14 PM, Peter Gottlieb n...@verizon.net wrote:
The antenna has a pretty clear sky view right now. I have about 75 feet of
cable, 25 feet that came attached permanently to the antenna, might be
RG-59, and a 50 foot extension which is a new piece of good quality RG-6
lack of a proper oven.
Bob
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of Garren Davis
Sent: Wednesday, February 27, 2013 10:27 AM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] Lady Heather numbers
...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf
Of Bob Camp
Sent: Wednesday, February 27, 2013 9:49 AM
To: 'Discussion of precise time and frequency measurement'
Subject: Re: [time-nuts] Lady Heather numbers
Hi
The temperature of your TBolt is moving 2.5 C. The OCXO frequency directly
follows
-
From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com]
On Behalf Of WarrenS
Sent: Tuesday, February 26, 2013 10:53 AM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] Lady Heather numbers
Can anyone comment on the picture.
I don't know
Of Garren Davis
Sent: Wednesday, February 27, 2013 1:20 PM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] Lady Heather numbers
I don't doubt that my oven could be the problem but I would think a lot of
people have their tbolts sitting in a room or basement with a lot
Garren wrote:
I don't doubt that my oven could be the problem but I would think a
lot of people have their tbolts sitting in a room or basement with a
lot more temperature swing than 2.5C. I also monitor the inner oven
temperature where the oscillator is located and it remains stable at
67C
[mailto:time-nuts-boun...@febo.com] On Behalf
Of Bob Camp
Sent: Wednesday, February 27, 2013 12:12 PM
To: 'Discussion of precise time and frequency measurement'
Subject: Re: [time-nuts] Lady Heather numbers
Hi
The TBolt does not use the temperature monitor when in locked mode. Your OCXO
is changing
-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of Bob Camp
Sent: Wednesday, February 27, 2013 12:12 PM
To: 'Discussion of precise time and frequency measurement'
Subject: Re: [time-nuts] Lady Heather numbers
Hi
The TBolt does not use the temperature monitor when in locked
: Monday, February 25, 2013 12:59 PM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] Lady Heather numbers
Thanks. I worry a little bit because my setup is not the normal thunderbolt
running on the shelf or a rack. The oven for my oscillator is broken so I
removed
[mailto:time-nuts-boun...@febo.com] On
Behalf Of Bob Camp
Sent: Monday, February 25, 2013 2:11 PM
To: 'Discussion of precise time and frequency measurement'
Subject: Re: [time-nuts] Lady Heather numbers
Hi
A typical TBolt OCXO will settle out with a control voltage that's
slightly positive
:41 PM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] Lady Heather numbers
From the attachment I see he is near LA with a nice house with a kidney shaped
pool :-)
Raj
At 26-02-2013, you wrote:
If I am not mistaken (and I could be), the Lat/Long suggests that you
Of Bob Camp
Sent: Monday, February 25, 2013 4:24 PM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] Lady Heather numbers
Hi
Useful link:
http://www.ke5fx.com/heather/readme.htm
For a screen command list hit space. Poking around at them can be fun!
To get
and frequency measurement
Subject: Re: [time-nuts] Lady Heather numbers
Hi
The unit should not be overly sensitive to temperature. I'd guess that your
improvised oven isn't holding temperature very well. The original likely held
things to within 0.1 C at some target in the 85 to 110C range.
Bob
On Feb
That should be that v360, Not dxxx to set the View Display time
use space or ? for Tbolt help screens
Garren posted
I notice that whenever a satellite drops out
it causes the oscillator white trace and the DAC green trace to jump
around.
I wonder why that happens when there are 6 other good
] On
Behalf Of Bob Camp
Sent: Monday, February 25, 2013 4:24 PM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] Lady Heather numbers
Hi
Useful link:
http://www.ke5fx.com/heather/readme.htm
For a screen command list hit space. Poking around at them can be fun
Can anyone comment on the picture.
I don't know if what I have would be considered good as far as accuracy and
stability is concerned.
The screen dump is way too short to give much detail.
What can be said from what is there:
From a Ham standpoint it is all working fine and is much better
How does one set the AMU value with LH?
On 2/26/2013 12:05 AM, Chuck Harris wrote:
To quote WarrenS:
To allow the Tbolt to work with weak signals from any antenna that I've tried,
even when indoors, I start by setting the TBolt's AMU level from the default
of 4
down to 0. This can be done
Hit the f key then the l key.
Garren
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf
Of Peter Gottlieb
Sent: Tuesday, February 26, 2013 4:37 PM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] Lady
Hi
Based on a very short display time, nothing looks seriously broken. I'd
suggest running the OCXO calibration routine at some point. Everything is
still warming up / settling out for the first week or two, so who knows
where it will finish out at.
Bob
-Original Message-
From:
time and frequency measurement'
Subject: Re: [time-nuts] Lady Heather numbers
Hi
Based on a very short display time, nothing looks seriously broken. I'd suggest
running the OCXO calibration routine at some point. Everything is still warming
up / settling out for the first week or two, so who
25, 2013 12:59 PM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] Lady Heather numbers
Thanks. I worry a little bit because my setup is not the normal thunderbolt
running on the
shelf or a rack. The oven for my oscillator is broken so I removed it from
If I am not mistaken (and I could be), the Lat/Long suggests that you are in
China. Is that correct?
Joe
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of Garren Davis
Sent: Monday, February 25, 2013 11:00 AM
To: Discussion of precise
of precise time and frequency measurement'
Subject: Re: [time-nuts] Lady Heather numbers
Hi
Based on a very short display time, nothing looks seriously broken. I'd
suggest running the OCXO calibration routine at some point. Everything is
still warming up / settling out for the first week or two
Davis
Sent: Monday, February 25, 2013 12:59 PM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] Lady Heather numbers
Thanks. I worry a little bit because my setup is not the normal thunderbolt
running on the shelf or a rack. The oven for my oscillator is broken
33 north, 117 west. I am in southern California.
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf
Of J. L. Trantham
Sent: Monday, February 25, 2013 3:44 PM
To: 'Discussion of precise time and frequency measurement'
Subject: Re: [time-nuts
...@febo.com] On
Behalf Of Garren Davis
Sent: Monday, February 25, 2013 12:59 PM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] Lady Heather numbers
Thanks. I worry a little bit because my setup is not the normal thunderbolt
running on the shelf or a rack
To: 'Discussion of precise time and frequency measurement'
Subject: Re: [time-nuts] Lady Heather numbers
Hi
Based on a very short display time, nothing looks seriously broken. I'd
suggest running the OCXO calibration routine at some point. Everything is
still warming up / settling out
'
Subject: Re: [time-nuts] Lady Heather numbers
If I am not mistaken (and I could be), the Lat/Long suggests that you are in
China. Is that correct?
Joe
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of Garren Davis
Sent: Monday, February 25
To: 'Discussion of precise time and frequency measurement'
Subject: Re: [time-nuts] Lady Heather numbers
OK. Found the problem. Google Earth defaults to 'East' not 'West'. Forgot to
tell it North/South, East/West.
Looks like your antenna is near the apex of your roof.
The 17 minute span
25, 2013 4:28 PM
To: 'Discussion of precise time and frequency measurement'
Subject: Re: [time-nuts] Lady Heather numbers
OK. Found the problem. Google Earth defaults to 'East' not 'West'. Forgot
to tell it North/South, East/West.
Looks like your antenna is near the apex of your roof
From the attachment I see he is near LA with a nice house with a kidney shaped
pool :-)
Raj
At 26-02-2013, you wrote:
If I am not mistaken (and I could be), the Lat/Long suggests that you are in
China. Is that correct?
Joe
-Original Message-
From: time-nuts-boun...@febo.com
To quote WarrenS:
To allow the Tbolt to work with weak signals from any antenna that I've tried,
even when indoors, I start by setting the TBolt's AMU level from the default of
4
down to 0. This can be done with the Tbolt S/W or LH.
My general AMU setting goal is to make it low enough so that
Garren posted
I notice that whenever a satellite drops out
it causes the oscillator white trace and the DAC green trace to jump around.
I wonder why that happens when there are 6 other good satellites.
The main causes of this is a poor location setting, (do a 24 + hr survey)
or the TBolt is
55 matches
Mail list logo
