**
- Original Message - From: Brian Kirby
kilodelta4foxmike at gmail.com
To: Discussion of precise time and frequency measurement
time-nuts at febo.com
Sent: Monday, March 15, 2010 2:09 PM
Subject: Re: [time-nuts] Choke Ring Pictures
Dr. Clark passed
, 2010 2:09 PM
Subject: Re: [time-nuts] Choke Ring Pictures
Dr. Clark passed on a tip that I used. Put the funnel in a microwave
oven and run it and see if the funnel warms up. If it warms up, you
do not use it. I do not know what type of plastic the funnel was
made out
and frequency measurement
Subject: Re: [time-nuts] Choke Ring Pictures
The home made choke ring was calculated and the pie/cake pans came
close. I think somebody all ready pointed at it, but Unavco or NASA had
the dimensions to about 6 or 8 common choke ring reflectors on line.
They are aluminum cake
time and frequency measurement
Subject: Re: [time-nuts] Choke Ring Pictures
The home made choke ring was calculated and the pie/cake pans came
close. I think somebody all ready pointed at it, but Unavco or NASA had
the dimensions to about 6 or 8 common choke ring reflectors on line
Dr. Clark passed on a tip that I used. Put the funnel in a microwave
oven and run it and see if the funnel warms up. If it warms up, you do
not use it. I do not know what type of plastic the funnel was made out
of; it was white, semi-transparent.
There were also comments about surveying
and frequency measurement
Subject: Re: [time-nuts] Choke Ring Pictures
For some idea of the considerations involved in selecting materials for
and designing a radome see:
http://ia331316.us.archive.org/0/items/radarscannersand033384mbp/radarscanne
rsand033384mbp.pdf
A list of the properties
Hi Brian:
The Lucent bullet antenna has a quad helix antenna structure, photos at:
http://www.prc68.com/I/DAGR.shtml#Ant and scroll down,
or maybe faster go to:
http://www.prc68.com/I/DAGR.shtml#DC
and scroll up.
Have Fun,
Brooke Clarke
http://www.PRC68.com
Brian Kirby wrote:
Dr. Clark
Subject: Re: [time-nuts] Choke Ring Pictures
Dr. Clark passed on a tip that I used. Put the funnel in a microwave oven
and run it and see if the funnel warms up. If it warms up, you do not use
it. I do not know what type of plastic the funnel was made out of; it was
white, semi-transparent
And the Andrew , Motorola and Pansonic have patches
Brooke Clarke wrote:
Hi Brian:
The Lucent bullet antenna has a quad helix antenna structure, photos at:
http://www.prc68.com/I/DAGR.shtml#Ant and scroll down,
or maybe faster go to:
http://www.prc68.com/I/DAGR.shtml#DC
and scroll up.
@febo.com
Sent: Monday, March 15, 2010 2:09 PM
Subject: Re: [time-nuts] Choke Ring Pictures
Dr. Clark passed on a tip that I used. Put the funnel in a microwave
oven and run it and see if the funnel warms up. If it warms up, you
do not use it. I do not know what type of plastic the funnel
: Monday, March 15, 2010 2:09 PM
Subject: Re: [time-nuts] Choke Ring Pictures
Dr. Clark passed on a tip that I used. Put the funnel in a microwave
oven and run it and see if the funnel warms up. If it warms up, you
do not use it. I do not know what type of plastic the funnel was
made out
Hi
The helix was the original NBS antenna for GPS. Lucent's antenna dates back
to the early 80's. The patch came along later. There are some significant
differences between them, few of which matter in normal time nut applications.
It's pretty easy to translate surveying units into timing
throw away junk up until now.
ws
**
- Original Message - From: Brian Kirby
kilodelta4foxmike at gmail.com
To: Discussion of precise time and frequency measurement
time-nuts at febo.com
Sent: Monday, March 15, 2010 2:09 PM
Subject: Re: [time-nuts] Choke Ring Pictures
Dr
Great resource and timing , I just finished ' Tuxedo Park '
and now know where the L in Loran came from
Steve
--- On Mon, 3/15/10, Bruce Griffiths bruce.griffi...@xtra.co.nz wrote:
From: Bruce Griffiths bruce.griffi...@xtra.co.nz
Subject: Re: [time-nuts] Choke Ring Pictures
WarrenS wrote:
Bruce wrote:
Which antenna performance metric do you have in mind?
Could do GPSDO hold over performance, but that would not be much of a
test of the antenna.
How about the antenna's effect on the ADEV Osc noise and Phase noise.
What else does the Time Nut care about?
at gmail.com
To: Discussion of precise time and frequency measurement
time-nuts at febo.com
Sent: Monday, March 15, 2010 2:09 PM
Subject: Re: [time-nuts] Choke Ring Pictures
Dr. Clark passed on a tip that I used. Put the funnel in a microwave
oven and run it and see if the funnel warms up
of precise time and frequency measurement
time-nuts at febo.com
Sent: Monday, March 15, 2010 2:09 PM
Subject: Re: [time-nuts] Choke Ring Pictures
Dr. Clark passed on a tip that I used. Put the funnel in a microwave
oven and run it and see if the funnel warms up. If it warms up, you
do
Magnus wrote:
Multipath rejection, antenna selectivity, antenna amplifier gain, antenna
noise factor... all weigh in.
And Your point is?
Their effects would all be included in as much as they effect ADEV Osc noise
and Phase noise.
Several of us have carrier phase and dual frequency
: Monday, March 15, 2010 2:09 PM
Subject: Re: [time-nuts] Choke Ring Pictures
Dr. Clark passed on a tip that I used. Put the funnel in a microwave
oven and run it and see if the funnel warms up. If it warms up, you
do not use it. I do not know what type of plastic the funnel was
made out
at gmail.com
To: Discussion of precise time and frequency measurement
time-nuts at febo.com
Sent: Monday, March 15, 2010 2:09 PM
Subject: Re: [time-nuts] Choke Ring Pictures
Dr. Clark passed on a tip that I used. Put the funnel in a microwave
oven and run it and see if the funnel warms up
WarrenS wrote:
Magnus wrote:
Multipath rejection, antenna selectivity, antenna amplifier gain,
antenna noise factor... all weigh in.
And Your point is?
Their effects would all be included in as much as they effect ADEV Osc
noise and Phase noise.
They would show up on the ADEV and
At one time I thought the Thunderbolt had some carrier phase capabilities...
it does not. I found a couple of undocumented (for the Thunderbolt) status
messages that indicate that the Thunderbolt firmware does not have the carrier
phase routines installed.
It does output the code phase
2:09 PM
Subject: Re: [time-nuts] Choke Ring Pictures
Dr. Clark passed on a tip that I used. Put the funnel in a microwave
oven and run it and see if the funnel warms up. If it warms up, you
do not use it. I do not know what type of plastic the funnel was
made out of; it was white
Hi
The real question is weather Trimble uses the data that's there to help their
algorithm stabilize the oscillator. I suspect there is a way for them to
extract the information without the full firmware set being present.
I agree that without being able to access the data properly, you
kilodelta4foxmike at gmail.com
To: Discussion of precise time and frequency measurement
time-nuts at febo.com
Sent: Monday, March 15, 2010 2:09 PM
Subject: Re: [time-nuts] Choke Ring Pictures
Dr. Clark passed on a tip that I used. Put the funnel in a microwave
oven and run it and see
All you can conclude from that is that the Thunderbolt GPS receiver
doesn't output carrier phase measures.
There's no way to tell if the GPS receiver itself uses carrier phase
data internally.
For example the M12+T and M12M_T GPS receivers use carrier phase
smoothing internally but unlike
To: Discussion of precise time and frequency measurement
time-nuts at febo.com
Sent: Monday, March 15, 2010 2:09 PM
Subject: Re: [time-nuts] Choke Ring Pictures
Dr. Clark passed on a tip that I used. Put the funnel in a microwave
oven and run it and see if the funnel warms up. If it warms up, you
do
**
- Original Message - From: Brian Kirby
kilodelta4foxmike at gmail.com
To: Discussion of precise time and frequency measurement
time-nuts at febo.com
Sent: Monday, March 15, 2010 2:09 PM
Subject: Re: [time-nuts] Choke Ring Pictures
Dr. Clark passed on a tip that I used
**
- Original Message - From: Brian Kirby
kilodelta4foxmike at gmail.com
To: Discussion of precise time and frequency measurement
time-nuts at febo.com
Sent: Monday, March 15, 2010 2:09 PM
Subject: Re: [time-nuts] Choke Ring Pictures
Dr. Clark passed on a tip that I used. Put
measurement
time-nuts at febo.com
Sent: Monday, March 15, 2010 2:09 PM
Subject: Re: [time-nuts] Choke Ring Pictures
Dr. Clark passed on a tip that I used. Put the funnel in a microwave
oven and run it and see if the funnel warms up. If it warms up, you
do not use it. I do not know what type
In a message dated 14/03/2010 04:24:10 GMT Standard Time,
kilodelta4foxm...@gmail.com writes:
I made 3 sets using pie plates. I promised somebody the pictures and
forgot it until now. The pictures are hosted at
http://kc0onr.com/Brian/_MG_0668.jpg
http://kc0onr.com/Brian/_MG_0669.jpg
Hi
I would call those aluminum cake, not pie, pans. It looks like you bought
a set for making wedding cakes.
Is there a different definition of pie in G8 land?
-Chuck Harris
gandal...@aol.com wrote:
In a message dated 14/03/2010 04:24:10 GMT Standard Time,
kilodelta4foxm...@gmail.com writes:
definition of pie
3.1415926535 etc ?
Ooops
D.
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. Partridge
Sent: Sunday, March 14, 2010 12:05 PM
To: 'Discussion of precise time and frequency measurement'
Subject: Re: [time-nuts] Choke Ring Pictures
definition of pie
3.1415926535 etc ?
Ooops
D.
___
time-nuts mailing list -- time-nuts@febo.com
David C. Partridge wrote:
definition of pie
3.1415926535 etc ?
Ooops
D.
And, as my daughter reminds me, today is pi day (in the U.S. where we
write the date month/year.. those of you in the rest of the world will
have to wait a long time, as there is no April 31st)
Easy as pi:
Take the first three odd digits 1,3, and 5.
Use two of each as 113355.
Put a division sign in the middle 113 )355
And you get pretty close...
___
time-nuts mailing list --
In a message dated 14/03/2010 15:46:55 GMT Standard Time,
cfhar...@erols.com writes:
I would call those aluminum cake, not pie, pans. It looks like you bought
a set for making wedding cakes.
Is there a different definition of pie in G8 land?
-
Hi Chuck
No other definition
Hi
All of these gizmos are going to work better outdoors than indoors. Coming up
with a rainproof / bird proof / bug proof cover for the choke ring that also is
rational at RF is one more gotcha. Both loss and dielectric distortion
effects are worth worrying about.
Bob
On Mar 14, 2010, at
It would be nice to know where he got them, as they appear to make
a successful GPS choke ring. If they are US cake pans, they are
likely sized in 1 inch steps.
In my world, a pie pan has sloped sides, and a cake pan has squared
sides... pie pans are always round, but cake pans can be a wide
jimlux wrote:
David C. Partridge wrote:
definition of pie
3.1415926535 etc ?
Ooops
D.
And, as my daughter reminds me, today is pi day (in the U.S. where we
write the date month/year.. those of you in the rest of the world will
have to wait a long time, as there is no April 31st)
Nope.
Hi
Wedding cake pans normally come in 1 increments and are either 2 or 3 deep.
Sets are 2 increments on the diameter:
http://cooksdream.com/store/wedding-round.html
Hi,
I have two AT575-90s - the Aeroantenna L1 chokering - resold by CMC, Leica
and others. They work really well as witnessed by others here. One nice
touch is that they - at least the CMC badged - come with a
marine-thread to 5/8 survey-mount adapter.
However, this model is not present at
Hi
Machining a chunk of Plexiglas sounds like more trouble that I would want to go
to for a cheap choke ring setup.
Maybe a hemispherical Plexiglass serving bowl
Bob
On Mar 14, 2010, at 3:42 PM, b...@lysator.liu.se wrote:
Hi,
I have two AT575-90s - the Aeroantenna L1 chokering -
Bob Camp wrote:
Hi
Wedding cake pans normally come in 1 increments and are either 2 or 3 deep. Sets
are 2 increments on the diameter:
http://cooksdream.com/store/wedding-round.html
Date: Sun, 14 Mar 2010 21:09:00 +0100
From: Magnus Danielson mag...@rubidium.dyndns.org
Subject: Re: [time-nuts] Choke Ring Pictures
To: Discussion of precise time and frequency measurement
time-nuts@febo.com
Message-ID: 4b9d425c.2050...@rubidium.dyndns.org
Content-Type: text/plain
Bob Camp wrote:
Hi
Machining a chunk of Plexiglas sounds like more trouble that I would want to go to for a cheap choke ring setup.
Maybe a hemispherical Plexiglass serving bowl
take a look at inexpensive light fixtures with hemispherical or
spherical plastic globes.
Actually,
Joe Gwinn wrote:
Date: Sun, 14 Mar 2010 21:09:00 +0100
From: Magnus Danielson mag...@rubidium.dyndns.org
Subject: Re: [time-nuts] Choke Ring Pictures
To: Discussion of precise time and frequency measurement
time-nuts@febo.com
Message-ID: 4b9d425c.2050...@rubidium.dyndns.org
Content-Type
Subject: Re: [time-nuts] Choke Ring Pictures
To: Discussion of precise time and frequency measurement time-nuts@febo.com
Date: Sunday, 14 March, 2010, 21:42
Joe Gwinn wrote:
Date: Sun, 14 Mar 2010 21:09:00 +0100
From: Magnus Danielson mag...@rubidium.dyndns.org
Subject: Re: [time-nuts] Choke Ring
...@rubidium.dyndns.org
Subject: Re: [time-nuts] Choke Ring Pictures
To: Discussion of precise time and frequency measurement
time-nuts@febo.com
Message-ID: 4b9d425c.2050...@rubidium.dyndns.org
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Bob Camp wrote:
Hi
Wedding cake
The home made choke ring was calculated and the pie/cake pans came
close. I think somebody all ready pointed at it, but Unavco or NASA had
the dimensions to about 6 or 8 common choke ring reflectors on line.
They are aluminum cake pans - I bought them in a crafts store. They are
one inch
Several years back we had the discussion about choke ring antennas.
Dr Thomas Clark - retired NASA - Goddard Space Flight Center - I believe
he was head of the VLBI project - made a simple choke ring antenna with
an electrical junction box.
I made 3 sets using pie plates. I promised
time and frequency measurement; Bill Clingan
Subject: [time-nuts] Choke Ring Pictures
Several years back we had the discussion about choke ring antennas.
Dr Thomas Clark - retired NASA - Goddard Space Flight Center - I believe
he was head of the VLBI project - made a simple choke ring antenna
Hi Brian!
Nice work!
/Björn
Several years back we had the discussion about choke ring antennas.
Dr Thomas Clark - retired NASA - Goddard Space Flight Center - I believe
he was head of the VLBI project - made a simple choke ring antenna with
an electrical junction box.
I made 3 sets using
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