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
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
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
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
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
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
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
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 12:01 AM, Chris Albertson wrote
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-View
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 portable survey
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)).
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
To: Discussion of precise time and frequency measurementtime-nuts@febo.com
Reply-To: Discussion of precise time and frequency measurement
time-nuts@febo.com
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
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
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.
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 choke
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
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
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
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
: b...@lysator.liu.se
To: Discussion of precise time and frequency measurement
time-nuts@febo.com
Sent: Tuesday, September 28, 2010 12:32 AM
Subject: Re: [time-nuts] antennas
Instead of reacting to a change in the OCXO, the control software can be
proactive wrt a change that is heading
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
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
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
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 one
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 one, the 58535A, supports 2 GPS receivers.
It has a built-in amplifier
? Seems there should be almost a decade of data out
there somewhere...
Thanks again...
73 Brice KA8MAV
- Original Message -
From: k6...@comcast.net
To: time-nuts@febo.com
Sent: Monday, September 27, 2010 10:50 AM
Subject: Re: [time-nuts] antennas
Rather than put up two antennas, why
- From: k6...@comcast.net
To: time-nuts@febo.com
Sent: Monday, September 27, 2010 10:50 AM
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
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 hmur...@megapathdsl.net wrote:
Bottom
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
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 n...@nf6x.net
Web page: http://www.nf6x.net/
GnuPG public key available from my web page.
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?
--
? It prompts you to
enter desired operating temperature. What could it control?
Russell (newbie)
- Original Message -
From: b...@lysator.liu.se
To: Discussion of precise time and frequency measurement
time-nuts@febo.com
Sent: Tuesday, September 28, 2010 12:32 AM
Subject: Re: [time-nuts
everything in place.
Sigh...
- Original Message -
From: Ken Winterling wa2...@frontiernet.net
To: Discussion of precise time and frequency measurement time-nuts@febo.com
Sent: Tuesday, February 17, 2009 6:33:40 PM GMT -07:00 US/Canada Mountain
Subject: Re: [time-nuts] Antennas, roofs
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)
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
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
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
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.
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
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)
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? :-)
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 help me unstop
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 obvious.
I
, 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 time-nuts@febo.com
Subject: Re: [time-nuts] Antennas in apartments
Neon John wrote:
On Sun, 16 Dec 2007 22:57:49 -0800, Hal Murray
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
antenna
problem is
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 it.
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