Note that many Antcom antennas are 2.5 to 24VDC...
/Björn
Sent from my iPhone
> On 9 Jun 2018, at 22:31, Dan Rae wrote:
>
>> On 6/9/2018 12:05 PM, Bruce Hunter via time-nuts wrote:
>> Has anyone stumbled across the 12V antennas for Symmetricom 2500 Time Source
>> units.
> I have a Symmetric
On 6/9/2018 12:05 PM, Bruce Hunter via time-nuts wrote:
Has anyone stumbled across the 12V antennas for Symmetricom 2500 Time Source
units.
I have a Symmetricom "Replacement GPS Antenna Kit" P/N 142-614-50 which
consists of "one wide range 5-12 VDC L1 antenna" and 50 feet of Belden
9104 coax t
I have one, Bruce, do you have questions about it? They are readily
available. Search on
TELECOM SOLUTIONS TS-3500 090-71010-87
It says TS-3500 but the same part is used on the 2500.
Bill
On Saturday, June 9, 2018, Bruce Hunter via time-nuts
wrote:
>
> Has anyone stumbled across the 12V an
Has anyone stumbled across the 12V antennas for Symmetricom 2500 Time Source
units. The basic 23 dB model was a Symmetricom 112-1-02, furnished as
part of the 093-03110-11 kit.
They also offered a 40 dB model, 112-8-02 with the 093-30110-12 kit and a
50 dB model, 112-8-03 as pa
On 4/18/13 1:40 PM, b...@lysator.liu.se wrote:
All of the "high quality" GNSS receiver manufacturers have their own
version of correlator that try to mitigate multipath. See for example
this Ashtech-document (for a ca 10 year old L1 only receiver (DG14/16)).
ftp://ftp.ashtech.com/OEM,%20Sen
Magnus, Jim,
> On 04/18/2013 04:00 PM, Jim Lux wrote:
>> On 4/18/13 12:01 AM, Chris Albertson wrote:
>>> If I read the paper correctly you can skip the choke ring if you mount
>>> the
>>> antenna on top of a 2 meter or longer mast. Iron pipe comes on 10 foot
>>> lengths. The choke ring is for port
nyone know the history of these ,I can find almost
nothing.
Email me directly if you have info, or I can start a new thread.
Tom Knox act...@hotmail.com
Date: Thu, 18 Apr 2013 19:58:22 +0200
From: mag...@rubidium.dyndns.org
To: time-nuts@febo.com
Subject: Re: [time-nuts] antennas was Re: Common
start a new thread.
Tom Knox act...@hotmail.com
> Date: Thu, 18 Apr 2013 19:58:22 +0200
> From: mag...@rubidium.dyndns.org
> To: time-nuts@febo.com
> Subject: Re: [time-nuts] antennas was Re: Common-View GPS Network
>
> On 04/18/2013 04:00 PM, Jim Lux wrote:
> > On 4/18/13 1
On 04/18/2013 04:00 PM, Jim Lux wrote:
On 4/18/13 12:01 AM, Chris Albertson wrote:
If I read the paper correctly you can skip the choke ring if you mount
the
antenna on top of a 2 meter or longer mast. Iron pipe comes on 10 foot
lengths. The choke ring is for portable survey antenna that can't b
On 4/18/13 12:01 AM, Chris Albertson wrote:
If I read the paper correctly you can skip the choke ring if you mount the
antenna on top of a 2 meter or longer mast. Iron pipe comes on 10 foot
lengths. The choke ring is for portable survey antenna that can't be
placed on tall rooftop masts. I th
If I read the paper correctly you can skip the choke ring if you mount the
antenna on top of a 2 meter or longer mast. Iron pipe comes on 10 foot
lengths. The choke ring is for portable survey antenna that can't be
placed on tall rooftop masts. I think a 2 meter pole on a roof pretty
much meets
From: li...@lazygranch.com
But the pan is just a ground plane. It isn't a reflector based on the type
of antennas I saw in the photograph.
=
If you are referring to my antenna farm photo, that's correct. It is also
magnetic, so it holds the pucks in place.
Chee
On 4/17/13 12:18 PM, Chris Albertson wrote:
Another way to ask this question is "what is the effect of a small
deviation form the ideal dimensions?"
If we assume deviations of about 1/20th of a wavelength are OK then we can
allow about 1cm of dimensional error. Almost anyone using simple hand
t
time and frequency measurement
Reply-To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] antennas was Re: Common-View GPS Network
Another way to ask this question is "what is the effect of a small
deviation form the ideal dimensions?"
If we assum
Another way to ask this question is "what is the effect of a small
deviation form the ideal dimensions?"
If we assume deviations of about 1/20th of a wavelength are OK then we can
allow about 1cm of dimensional error. Almost anyone using simple hand
tools can do better.
With care using primitive
From: Sarah White
I just have to ask though... cake pans? really? I can't imagine it would
even be possible to modify a cake pan with enough accuracy to get a
usable antenna.
-- Sarah
Well, my GPS antenna farm uses an inverted baking tray
http://w
On 4/16/13 5:19 PM, Sarah White wrote:
I just have to ask though... cake pans? really? I can't imagine it would
even be possible to modify a cake pan with enough accuracy to get a
usable antenna.
Sure.. cake pans, like other stamped goods, are actually pretty high
precision, because they're
On 4/16/2013 1:55 AM, Jim Lux wrote:
> On 4/15/13 10:22 PM, Jim Lux wrote:
>> On 4/15/13 9:27 PM, Tom Van Baak wrote:
>>> NIST SIM GPS common view pinwheel
>> described in one of the NIST reports as an aperture coupled slot fed
>> array that is better than a patch, but not as large and heavy as a c
On 4/15/13 10:22 PM, Jim Lux wrote:
On 4/15/13 9:27 PM, Tom Van Baak wrote:
NIST SIM GPS common view pinwheel
described in one of the NIST reports as an aperture coupled slot fed
array that is better than a patch, but not as large and heavy as a choke
ring.
W. Kunysz, 2000, “High Performance
Read through the comments at the start of the file heather.cpp
There is an option for Heather to control the temperature of the Tbolt. This
is most easily done by enclosing it in a box and using a small fan to pump
ambient air into the box. Heather has a nice PID controller (that Warren
Sark
On 09/28/2010 09:38 AM, Hal Murray wrote:
What is the purpose of the temperature sensor chip on the PCB, anyway? Isn't
the temperature inside the OCXO much more important?
The OCXO isn't perfcet. The frequency will shift slightly with environmental
temperature changes.
Let's consider a the
; Russell (newbie)
>
>
> - Original Message - From:
> To: "Discussion of precise time and frequency measurement"
>
> Sent: Tuesday, September 28, 2010 12:32 AM
> Subject: Re: [time-nuts] antennas
>
>
> Instead of reacting to a change in th
> What is the purpose of the temperature sensor chip on the PCB, anyway? Isn't
> the temperature inside the OCXO much more important?
The OCXO isn't perfcet. The frequency will shift slightly with environmental
temperature changes.
It may have been more important without the high-quality OCXO
ommand do? It prompts you to
"enter desired operating temperature". What could it control?
Russell (newbie)
- Original Message -
From:
To: "Discussion of precise time and frequency measurement"
Sent: Tuesday, September 28, 2010 12:32 AM
Subject: Re: [time-nuts
Instead of reacting to a change in the OCXO, the control software can be
proactive wrt a change that is heading towards the inside of the oven.
--
Björn
> What is the purpose of the temperature sensor chip on the PCB, anyway?
> Isn't the temperature inside the OCXO much more important?
>
> -
What is the purpose of the temperature sensor chip on the PCB, anyway? Isn't
the temperature inside the OCXO much more important?
--
Mark J. Blair, NF6X
Web page: http://www.nf6x.net/
GnuPG public key available from my web page.
___
time-nuts ma
Long term stability is pretty much totally irrelevant for Tbolts. What is
important is resolution of the temperature readings. The Tbolt responds much
more to changes in temperature, not absolute temperature.
Since few of us have an oil bath to chec
Hi
Based only on the fact that they never fixed the problem with the chip - I
don't think they do a lot of fine grain temperature correction. They certainly
went on shipping the units as spec compliant.
Bob
On Sep 27, 2010, at 10:20 PM, Hal Murray wrote:
>
>> Bottom line appears to be - f
> Bottom line appears to be - fine for day to day checks. I would not trust
> any of these chips to be long term stable to sub 10 mK levels.
I think the temperature correction is only used in holdover.
What's the time constant on learning the temperature profile of the OCXO? As
long as the agi
of data out
> there somewhere...
>
> Thanks again...
>
> 73 Brice KA8MAV
>
> - Original Message ----- From:
> To:
> Sent: Monday, September 27, 2010 10:50 AM
> Subject: Re: [time-nuts] antennas
>
>
>> Rather than put up two antennas, why not use one, a
nd any long term
stability data on them? Seems there should be almost a decade of data out
there somewhere...
Thanks again...
73 Brice KA8MAV
- Original Message -
From:
To:
Sent: Monday, September 27, 2010 10:50 AM
Subject: Re: [time-nuts] antennas
Rather than put up two ante
itself...
Didier KO4BB
Sent from my Verizon Wireless BlackBerry
-Original Message-
From: k6...@comcast.net
Sender: time-nuts-boun...@febo.com
Date: Mon, 27 Sep 2010 14:50:15
To:
Reply-To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] antennas
.net
Sent: Monday, September 27, 2010 10:50 AM
To: time-nuts@febo.com
Subject: Re: [time-nuts] antennas
Rather than put up two antennas, why not use one, and pick up a
HP/Symmetricom GPS splitter? (Mini-Circuits makes a similar unit). You can
find them on eBay for various prices. The Symmetricom
Rather than put up two antennas, why not use one, and pick up a HP/Symmetricom
GPS splitter? (Mini-Circuits makes a similar unit). You can find them on eBay
for various prices. The Symmetricom one, the 58535A, supports 2 GPS receivers.
It has a built-in amplifier and filters, so it provides high
In message <619502179.1235901234946739463.javamail.r...@sz0108a.emeryville.ca.m
ail.comcast.net>, d.sei...@comcast.net writes:
>> A slightly crazy idea... Has anybody poked antennas up inside a skylight?
Yes, it works, I have a M12T running that way. It is an acrylic
or polycarbonate (not sure)
p up the existing roof and put everything in place.
Sigh...
- Original Message -
From: "Ken Winterling"
To: "Discussion of precise time and frequency measurement"
Sent: Tuesday, February 17, 2009 6:33:40 PM GMT -07:00 US/Canada Mountain
Subject: Re: [time-nu
Hello Hal,
You can find roof penetrations in the plumbing dept of Home Depot or Lowes.
Some will handle from a 4" (ID) PVC pipe used as a drain vent, down to a
1" trade size pipe.
I prefer the rubber gland on sheet metal, vs. the rubber gland on plastic.
Using the white DWV (drain waste vent) P
Depending where you are most homes have sewer vents. I have used this
repeatedly in the US and in Germany. This is a PVC pipe going through the roof
and
normally well sealed by the roofer, but open on the top. In the past Radio
Shack had pipe to pipe clamps the pair for less than $10. You ch
Hal,
If your new roof will have a ridge vent you can poke the antenna cables
through it to the outside leaving enough slack to create a drip loop before
continuing to the antenna(s). Since the ridge vent follows the slope of the
roof the cable will exit on the down side so water will run off.
Ke
Yup, running my T-bolt on an indoor patch antenna hoisted to the apex of a
skylight. Works fine.
My GPS NTP server uses a bullet antenna mounted on a short (~1ft) pole
bolted to a block of wood on the side of the house, feedthrough is PVC pipe
going through the wall with a 45-degree coupler on th
Hi Hal,
A metal roof is generally used for those areas that have heavy snow. Such a roof
would be disastrous for the GPS if the antenna is low on top of the roof because
of reflections. A metal roof would be harder to seal, I would think, for holes
drilled through it. Also a metal roof can be qu
> I really need to put in a feed through to the roof because my Z3801A
> is struggling with an indoor antenna too; but the roof needs to get
> replaced first...
Speaking of antennas and roofs
Currently, my antennas are inside. That's good enough most of the time.
It's also good for provi
Neon John wrote:
> On Mon, 17 Dec 2007 13:43:41 -0500, Chuck Harris <[EMAIL PROTECTED]> wrote:
>
>> Neon John wrote:
>>> Federal law says that landlords cannot prohibit satellite TV dishes.
>>> Another one of
>>> those "best laws money can buy". The implication for a solution to the GPS
>>> ant
ndlord, if he asks, the use is classified.
73, Dick, W1KSZ/7
-Original Message-
>From: Chuck Harris <[EMAIL PROTECTED]>
>Sent: Dec 17, 2007 11:43 AM
>To: Discussion of precise time and frequency measurement
>Subject: Re: [time-nuts] Antennas in apartments
>
>N
On Mon, 17 Dec 2007 13:43:41 -0500, Chuck Harris <[EMAIL PROTECTED]> wrote:
>Neon John wrote:
>> Federal law says that landlords cannot prohibit satellite TV dishes. Another
>> one of
>> those "best laws money can buy". The implication for a solution to the GPS
>> antenna
>> problem is fairly o
Neon John wrote:
> On Sun, 16 Dec 2007 22:57:49 -0800, Hal Murray <[EMAIL PROTECTED]> wrote:
>
>
>> Talk to your building superintendent. Offer to provide NTP service to the
>> whole complex if he will help you setup a GPS antenna.
>
> I can see it now. "Duh, how's this NTP stuff gonna hel
On Sun, 16 Dec 2007 22:57:49 -0800, Hal Murray <[EMAIL PROTECTED]> wrote:
>Talk to your building superintendent. Offer to provide NTP service to the
>whole complex if he will help you setup a GPS antenna.
I can see it now. "Duh, how's this NTP stuff gonna help me unstop the
toilet in
23?"
> i thought of tha balcony option. The balcony as an overhang which
> effectively blots out the other half of ths sky not covered by the
> building. I cannot hang any antenna over the railing or on it(in my
> lease and enofrce;I asked), plus there are birds and squirrels which
> would get into
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