On 04/07/2012 01:30 PM, Tom Van Baak wrote:
It might be a stupid question, but what is the spike at the top for?
It's just plastic; not for lightning. For me it keeps birds from sitting
on the top of the radome and dropping liquid gps signal attenuators.
This is actually an improvement over
Chuck,
I usually see GPS antennae flashed by lightning: have succedeed opening and
repairing a couple of them but at times they are too bad to do anything. I
use a network analyzer to test them after repairing here at work.
On Tue, Apr 3, 2012 at 8:24 AM, gary li...@lazygranch.com wrote:
Going
On Mon, 02 Apr 2012 15:28:40 -0700, Bob Martin wrote:
Bill--
The Thunderbolt wants a higher gain antenna than most standard GPS
receivers. I tried standard Garmin active antennas, and while they
worked (I have a good view of the sky), signal levels could be better.
Best match probably
The Symmetricom item 300571554900 you listed below includes a GPS.
It is not just an antenna.
Rob Kimberley
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of cfo
Sent: 03 April 2012 15:31
To: time-nuts@febo.com
Subject: Re: [time-nuts
On Tue, 03 Apr 2012 15:40:05 +0100, Rob Kimberley wrote:
The Symmetricom item 300571554900 you listed below includes a GPS.
It is not just an antenna.
Rob Kimberley
Oopzz , good catch (sorry)
280847506469 (us)
320878139168 (cn)
Might be better
cfo
They look OK.
:-)
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of cfo
Sent: 03 April 2012 15:51
To: time-nuts@febo.com
Subject: Re: [time-nuts] Antenna for T-bolt
On Tue, 03 Apr 2012 15:40:05 +0100, Rob Kimberley wrote
Reply-To: Discussion of precise time and frequency measurement
time-nuts@febo.com
Subject: Re: [time-nuts] Antenna for t-bolt
Hi Didier,
I have one of the Trimble Bullet antennas, that was supposed to be from
a working system, but it is deaf as a post... really dead. Given
: [time-nuts] Antenna for t-bolt
Sent: Apr 3, 2012 12:15 AM
c...@omen.com said:
Presumably a timing antenna would block low elevation signals to reduce
multipath.
Maybe, but there is a software aspect to the filter. You get to select the
elevation angle.
I don't remember seeing any specs
and such, so it is definitely not useless, but it is not the
same as having a good antenna in the first place.
Didier KO4BB
--Original Message--
From: Hal Murray
Sender: time-nuts-boun...@febo.com
To: Time-Nuts
ReplyTo: Time-Nuts
Subject: Re: [time-nuts] Antenna for t-bolt
Sent
: [time-nuts] Antenna for t-bolt
Of course the elevation mask is only software and doesn't prevent the bad
signal from entering the antenna but then the signal will not despread and
should cause no harm to the computations.
On Tue, Apr 3, 2012 at 9:19 PM, shali...@gmail.com wrote:
The elevation
time-nuts@febo.com
Subject: Re: [time-nuts] Antenna for t-bolt
Of course the elevation mask is only software and doesn't prevent the bad
signal from entering the antenna but then the signal will not despread and
should cause no harm to the computations.
On Tue, Apr 3, 2012 at 9:19 PM
Typical chokerings are L1/L2 geodetic antennas. There is however simple
L1-only chokerings available from time to time on *bay. I have often seen
them as low as in the $50 range. Orginal use I think was for DGPS
reference stations. Most seem to be the Aeroantenna model in the url
below.
Yes, there was an antenna with the sting months ago, now that I see your
PDF I remember but can't remember the price and the brand.
On Tue, Apr 3, 2012 at 10:05 PM, b...@lysator.liu.se wrote:
Typical chokerings are L1/L2 geodetic antennas. There is however simple
L1-only chokerings available
shali...@gmail.com said:
I got it with a red box Thunderbolt I bought from a lit member a long time
ago. It has some obvious signs of experience being outside. It is possible
that moisture got inside. Maybe I should try to take it apart? Not sure how
to open it without breaking the radome.
I found these at a local surplus shop. $15 each. It worked on the
Starloc. I got the 240 version which has high gain. The Starloc is a bit
deaf. So to pick an antenna for the Tbolt, it should meet gain
requirements and voltage. Marine grade is kind of overkill. Potentially
the marine grade
The booster amps used for satellite dishes work on GPS as well.
I used one when I was feeding two Thunderbolts thru a splitter.
On 04/02/2012 03:28 PM, Bob Martin wrote:
Bill--
The Thunderbolt wants a higher gain antenna than most standard GPS receivers.
I tried standard Garmin active
Here is the antenna I purchased from Ebay (China). This is a Lucent 40dB timing
antenna that should work
for any GPS receiver. Mine took about 2 weeks to get here and there were no
problems getting it. This unit
is currently available for 'buy it now at $28 dollars.
On Mon, Apr 2, 2012 at 3:28 PM, Bob Martin k6...@comcast.net wrote:
Bill--
The Thunderbolt wants a higher gain antenna than most standard GPS receivers.
I tried standard Garmin active antennas, and while they worked (I have a
good view of the sky), signal levels could be better.
Best
All gone .. I got one. I'm happy for $26 but the thing was pretty
badly treated in its life and the seal did not
look well. If yours is as knocked around I'd suggest pulling it apart
and use a bit of sealer (RTV etc)
Now to come up with a mount, they are more rare and usually go for
more then the
On Mon, Apr 2, 2012 at 4:00 PM, Jerry Mulchin jmulc...@cox.net wrote:
Here is the antenna I purchased from Ebay (China). This is a Lucent 40dB
timing antenna that should work
for any GPS receiver. Mine took about 2 weeks to get here and there were no
problems getting it. This unit
is
There are still some listed at GBP 19.00. Search for lucent 40db.
Orin.
On Mon, Apr 2, 2012 at 4:14 PM, Pete Lancashire p...@petelancashire.comwrote:
All gone .. I got one. I'm happy for $26 but the thing was pretty
badly treated in its life and the seal did not
look well. If yours is as
There's a lot of five Racal survey antennae on eBay, lot 370600485855
which have been round at least once before. I use one of these with a
T'bolt and it performs extremely well; I'm not sure what one would do
with the other four however...
5 Volt operation, TNC connector, c. 30 dB gain.
I have a Symetricom 58532A which I bought on eBay for $50 with shipping.
That is probably the best antenna you can get, and it won't break the bank.
I also have a Trimble Bullet, the antenna that was designed to go with the
Tunderbolt. It is a very good antenna also, but harder to find, and it has
On 4/2/2012 5:39 PM, Bill Riches wrote:
Question is that I am looking for suggestions for GPS antenna for t-bolt.
I use an Andrew GPS-QBW-26N (quadrifilar). 26 db amp + 4 db antenna
gain, through an HP 58516 distribution amp. Works well for me.
Hi Didier,
I have one of the Trimble Bullet antennas, that was supposed to be from
a working system, but it is deaf as a post... really dead. Given that
it is supposed to be more than 30db gain, it should do better than any
of the hockey puck antennas.
I wonder if there is a common failure
Here is a picture of the guts of the antenna that was made for
the Thunderbolt. They don't appear to have gone to much effort
to have a high horizon.
-Chuck Harris
Chuck Forsberg WA7KGX N2469R wrote:
I got a mushroom shaped antenna along with my Thunderbolt.
It came with some rg58 terminated
c...@omen.com said:
Presumably a timing antenna would block low elevation signals to reduce
multipath.
Maybe, but there is a software aspect to the filter. You get to select the
elevation angle.
I don't remember seeing any specs about the filtering angles of various
antennas. Has anybody
These antennas work very well with the Thunderbolt:
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItemitem=280228924879
Pyrojoseph is a great seller. I've bought a lot of stuff from him over the
years.
This antenna will need a BNC-male/SMA-female adapter for use with the BNC-F
adapter packaged with
I have a Trimble Bullet, a Symmetricom HP 58532 and an inexpensive mag-mount
patch antenna. All are amplified. As far as how many sats they see, they are
roughly equivalent. Of course, the Bullet and HP units have narrow filters
and better defined capture range (to reject reflections from the
TAPR is selling a nice antenna for $10.
73, Dick, W1KSZ
-Original Message-
From: Mark Amos [EMAIL PROTECTED]
Sent: May 20, 2008 3:12 PM
To: time-nuts@febo.com
Subject: [time-nuts] antenna for t-bolt
tvb or others on the list,
Any recommendations on an inexpensive antenna to use with
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