Hi
Like the Lucent antennas, they are ceramic patch antennas inside a fairly
rugged enclosure. They are fine antennas, but they aren't choke ring designs.
Bob
On Mar 10, 2013, at 12:07 AM, Peter Gottlieb n...@verizon.net wrote:
I'd like to get a better antenna for my Thunderbolt.
I see
Yes, the Trimble Bullet is the originally suggested antenna for the TBolt
but it is nothing special. Any patch timing antenna can do (Symmetricom
58532, Motorola Timing2000, Panasonic VIC100 and similar). To deviate from
the usual patch type antenna, there is the Procom GPS4 quadrifilar helix
and,
Hi Peter,
Why not. The antenna is optimized for that purpose (receiving GPS L1),
omnidirectional and tuned to the GPS frequency, snow skids down, birds
can't land on it. As N0UU affirms, there's nothing further sensational
inside.
I don't know, how proficient you are with radio frequency
The seller had a make offer so I tried $20 and it was set to auto accept. I
figure for $25 (with shipping) it's worth a shot for a new unit. The Trimble
data sheet says it is good for up to 75 feet of coax, I think I'll end up with
about 50 here. The antenna I have been using is a no-name
Hi
How long a run of coax will you have? Do you have a power splitter at the
receiver end?
You probably need 10 db of gain between the antenna and the receiver. If the
antenna has 25 db of gain, you have 15 db to waste on cable loss and power
splitting. With no power splitter, you could run
Thank you. The antenna spec is 35 dB gain and I'll end up with 50-75 feet of
RG-6. Maybe I'll just put in a TNC-F adapter as there are F connectors made
especially for RG-6, and probably no TNC connectors like that!
Thanks again.
Peter
On 3/10/2013 12:35 PM, Bob Camp wrote:
Hi
How long
Exactly. I'll probably wait until NEARfest up here and pick one up there. You
know, more justification to go.
Peter
On 3/10/2013 12:45 PM, George Dubovsky wrote:
It seems, just go with quad shield RG-6 and be done with it. I even have
part of a spool of that laying around.
It seems, just go with quad shield RG-6 and be done with it. I even have
part of a spool of that laying around. Maybe more of an issue is how do
you properly connect a TNC to that stuff (the antenna has a TNC).
Peter
Here is one solution:
On Sat, Mar 9, 2013 at 9:07 PM, Peter Gottlieb n...@verizon.net wrote:
I'd like to get a better antenna for my Thunderbolt.
I see Trimble bullet antennas type 57860-00 on ebay for $30 or so, specs
look to be 5 volt 35 dB gain.
Would something like this be a good choice?
Yes. They work well
On 3/10/2013 12:04 PM, Peter Gottlieb wrote:
RG-5910.4 dB/100 ft
RG-68.4 dB/100 ft
Heliax 7.4 dB/100 ft FSJ1-50A
RG-11 5.7 dB/100 ft
(Yes, I'm aware of the impedance differences)
I used LMR-400. 5.1 dB @1.5 GHz /100 ft, 90 dB shield.
And, it's
Also available from Times Microwave in 75 Ohm. Google LMR400-754.9 dB per 100
ft. @ 1.5 GHz.
-- FL
--- Den søn 10/3/13 skrev Mike S mi...@flatsurface.com:
Fra: Mike S mi...@flatsurface.com
Emne: Re: [time-nuts] Thunderbolt antenna
Til: time-nuts@febo.com
Dato: søndag 10. marts 2013 11.22
On 3
I bought one of the 40 db gain GPS antennas that were on Ebay
some time ago. I had been using a mushroom style antenna with
an rg-59 lead that came with one of the Thunderbolts. I have
maybe 75 feet of rg-6 lead in.
Rg-6 sold for satellite dishes or cable companies should do just fine
without
Hi
You do need to be a little careful with gain. Past a certain point, you do no
more good for the noise figure of the system , but you do degrade the overload
performance.
Bob
On Mar 10, 2013, at 3:40 PM, Chuck Forsberg WA7KGX N2469R c...@omen.com wrote:
I bought one of the 40 db gain GPS
To me, that seems to be a much more important issue than suggestions
about the right cable.
Volker
Am 10.03.2013 21:48, schrieb Bob Camp:
Hi
You do need to be a little careful with gain. Past a certain point, you do no
more good for the noise figure of the system , but you do degrade the
I'd like to get a better antenna for my Thunderbolt.
I see Trimble bullet antennas type 57860-00 on ebay for $30 or so, specs look to
be 5 volt 35 dB gain.
Would something like this be a good choice?
Peter
___
time-nuts mailing list --
That's a dramatic and impressive difference Mark! Were the other
choke-rings similarly better than the ordinary conical, or was this
one heads and shoulders better than the rest? I was just wondering if
it was the choke-ring concept that gave the major improvement, with
this one just being
All the choke ring antennas were similar in performance. The Aero/Leica one
is optimized for the L1 freq only.
All the other choke rings that I tested did L1/L2 which compromises performance
a bit which did show up in the data (but at a level that could just have been
random luck of the
Good information to know, if one is doing survey work.
But some NON-Nut needs to ask, SO WHAT?
A 3 foot error may cause + - 3ns of additional phase time error, which is
well below the short term GPS noise level.
If that is averaged over the 500 or so second TC loop or the 48 hrs supper
survey
-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of Dave hartzell
Sent: Thursday, March 11, 2010 10:23 PM
To: Discussion of precise time and frequency measurement
Subject: [time-nuts] Thunderbolt antenna?
Hello,
I'm looking for a decent outdoor antenna for my
Hi
That's quite an antenna. 10 lbs and 14 diameter
Bob
On Mar 11, 2010, at 11:29 PM, Mark Sims wrote:
It doesn't get any better than Ebay item 270262189976... I've tested a
couple dozen antennas and nothing comes close to what it does... It's big.
It's pricey (but FAR less than
Looks like a standard choke ring antenna.
Bruce
Bob Camp wrote:
Hi
That's quite an antenna. 10 lbs and 14 diameter
Bob
On Mar 11, 2010, at 11:29 PM, Mark Sims wrote:
It doesn't get any better than Ebay item 270262189976... I've tested a couple
dozen antennas and nothing comes
Mark wrote:
It doesn't get any better than Ebay item 270262189976... I've
tested a couple dozen antennas and nothing comes close to what it
does... It's big. It's pricey (but FAR less than the $2000+
original cost). It's good.
On Mark's advice, I got one of these a few months ago. It
Hello,
I'm looking for a decent outdoor antenna for my Thunderbolt... I need to
graduate beyond the puck-antenna in the window sill.
Any recommendations and/or sources (the lower cost, the better of course!)?
Thanks,
Dave
___
time-nuts mailing list
It doesn't get any better than Ebay item 270262189976... I've tested a couple
dozen antennas and nothing comes close to what it does... It's big. It's
pricey (but FAR less than the $2000+ original cost). It's good.
---
I'm looking for a decent outdoor antenna for my Thunderbolt...
24 matches
Mail list logo
