Hi Joe,
40dB is not needed when you have a short (<10m) /good antenna cable. Then
26dB will be plenty fine. Howver going to 20 or 30+ meters using standard
RG58 will be a problem with 26dB. Ofcause what matters is the attenuation
at L1 with your cable. Better cable can be longer...
You do not need an spectrum/network analyzer. Take a your antenna and
receiver to a good site, if you installation site might be marginal. Your
C/N0 (snr) should be around or above 50dBHz for high elevation satellites.
Then compare the C/N0 values for you antenna at your workshop, to see how
much worse than "perfect" that site is. If using a Tbolt remember to
change from Trimble AMU into dBHz.
Note that LNA dB amplification not generally translate direcly into dB
carrier to noise ratio.
--
Björn
PS I got a small batch of HP timing antennas new in box for around $25 a
piece some years ago... :-) DS
Mine arrived in the same manner. It works but I can't tell any real
difference between it and my 26 dB antenna, switching between them when
mounted on the corner of the roof of my workshop.
Joe
-----Original Message-----
From: time-nuts-bounces@febo.com [mailto:time-nuts-bounces@febo.com] On
Behalf Of Steve Krull
Sent: Friday, April 13, 2012 1:40 PM
To: time-nuts@febo.com
Subject: Re: [time-nuts] Lucent 40 dB Antenna
Just got mine, from "Just_for_survive" on eBay. Poorest packing job I've
ever seen for an international package. Three wraps of newsprint and a
thin padded envelope. I'll know this weekend if its operational.
Steve
On Tue, Apr 10, 2012 at 11:14 PM, Chuck Forsberg WA7KGX N2469R wrote:
My Lucent antenna arrived today. I scrounged some adapters
and connected it to my Thunderbolt. Two birds were visible
with AMU > 4 when I held the antenna. My Droid 3 could not
see any birds through the wet roof.
The unit has some dings and scrapes but no visible corrosion.
I am tempted to take it apart but don't wish to break a unit
which seems to be working well.
Has anyone compared this antenna with the mushroom that
came from China with the used Thunderbolts???
--
Chuck Forsberg WA7KGX N2469R caf@omen.com www.omen.com
Developer of Industrial ZMODEM(Tm) for Embedded Applications
Omen Technology Inc "The High Reliability Software"
10255 NW Old Cornelius Pass Portland OR 97231 503-614-0430
time-nuts mailing list -- time-nuts@febo.com
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Hi
You were lucky with your HOA. Around here, things aren't quite that easy. Even spending the bucks about the only thing you can put up are a single 1 meter DISH antenna.
Bob
On Apr 13, 2012, at 9:37 PM, lists@lazygranch.com wrote:
For the dishes and HD antennas, I just found the FCC rules and gave them to the person that wanted to put up the antennas. Basically you cite chapter and verse and the HOA caves.
The TV stations and dish companies did all the federal lobby work, and federal law trumps everything.
-----Original Message-----
From: Bob Camp lists@rtty.us
Sender: time-nuts-bounces@febo.com
Date: Fri, 13 Apr 2012 21:12:44
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] Lucent 40 dB Antenna
Hi
The problem is that you can easily spend $10K proving to them that they can't enforce the silly rules….
Bob
On Apr 13, 2012, at 8:49 PM, lists@lazygranch.com wrote:
Most of those no antenna rules can't be enforced. They can control the color of the antenna. Yes, really. For example, CONUS, you can have any number of 1 meter dishes. You might have to paint the dish.
-----Original Message-----
From: Steve steve-krull@cox.net
Sender: time-nuts-bounces@febo.com
Date: Fri, 13 Apr 2012 19:31:16
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] Lucent 40 dB Antenna
Paul,
I believe I read in an earlier post that someone was using one of these with a Tbolt, which is 5 volts to the antenna. Hope I'm not mistaken! I didn't hear any rattles when I shook the unit so I'm keeping my fingers crossed. They do appear to be pretty rugged so I'm hoping for the best. The reply from the seller ignored my poor packing complaint and said "this is used, it can not all are the same. our guaranteed is you can ask for refund if it can not works." I assume they have a boatload of them bought very cheaply and they are playing the odds that they will make more from replacing a few that don't survive shipping than they would if they spent a bit more on packing material for all shipments.
We live in a National Historic District so no outdoor antennas here. My antennas are in the attic above the third floor, putting them about 40 ft AGL. So far the shingled roof hasn't been a major obstacle and the GPS antennas are above the HVAC ductwork. I'll see if there's any difference between this antenna and the HP that's on the Z3816 now.
73,
Steve
WB0DBS
On Apr 13, 2012, at 1:52 PM, paul swed paulswedb@gmail.com wrote:
Steve will be interesting to hear how it goes. Thats a reasonable price it
seems and the antenna looks like it could handle abuse pretty well. Any
idea if its a 5 volt unit or actually any other detail?
Regards
Paul
WB8TSL
On Fri, Apr 13, 2012 at 2:39 PM, Steve Krull steve-krull@cox.net wrote:
Just got mine, from "Just_for_survive" on eBay. Poorest packing job I've
ever seen for an international package. Three wraps of newsprint and a thin
padded envelope. I'll know this weekend if its operational.
Steve
On Tue, Apr 10, 2012 at 11:14 PM, Chuck Forsberg WA7KGX N2469R wrote:
My Lucent antenna arrived today. I scrounged some adapters
and connected it to my Thunderbolt. Two birds were visible
with AMU > 4 when I held the antenna. My Droid 3 could not
see any birds through the wet roof.
The unit has some dings and scrapes but no visible corrosion.
I am tempted to take it apart but don't wish to break a unit
which seems to be working well.
Has anyone compared this antenna with the mushroom that
came from China with the used Thunderbolts???
--
Chuck Forsberg WA7KGX N2469R caf@omen.com www.omen.com
Developer of Industrial ZMODEM(Tm) for Embedded Applications
Omen Technology Inc "The High Reliability Software"
10255 NW Old Cornelius Pass Portland OR 97231 503-614-0430
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40 dB gain for me.
Joe
-----Original Message-----
From: time-nuts-bounces@febo.com [mailto:time-nuts-bounces@febo.com] On
Behalf Of Tom Knox
Sent: Friday, April 13, 2012 10:55 PM
To: Time-Nuts
Subject: Re: [time-nuts] Lucent 40 dB Antenna
Is everyone buying these because they have 40dB gain or because they are the
only reasonably priced GPS timing antennas on eBay right now?
Thomas Knox
Date: Fri, 13 Apr 2012 23:05:05 -0400
From: paulswedb@gmail.com
To: time-nuts@febo.com
Subject: Re: [time-nuts] Lucent 40 dB Antenna
Boy thats pretty nasty indeed
On Fri, Apr 13, 2012 at 10:23 PM, Tom Knox actast@hotmail.com wrote:
The seller should be ashamed for selling something that beat up as
working.
Thomas Knox
Date: Fri, 13 Apr 2012 18:57:40 -0700
From: pete@petelancashire.com
To: time-nuts@febo.com
Subject: Re: [time-nuts] Lucent 40 dB Antenna
Here is what looks like from the inside
Photo 2 and 3 show what impact to the screws to hold the two
pieces together can do.
-pete
On Fri, Apr 13, 2012 at 12:47 PM, Pete Lancashire
pete@petelancashire.com wrote:
That is the seller I got mine from. I still argee with Paul,
unless
you think
the seal between the two halves has been broken don't pull it
apart.
I'll
post the photos I took of mine. And when I get it back from
being
resealed
will see if it works or not (Should have done that first ..
duh).
-pete
On Fri, Apr 13, 2012 at 11:39 AM, Steve Krull
steve-krull@cox.net
wrote:
Just got mine, from "Just_for_survive" on eBay. Poorest packing
job
I've
ever seen for an international package. Three wraps of
newsprint and
a thin
padded envelope. I'll know this weekend if its operational.
Steve
On Tue, Apr 10, 2012 at 11:14 PM, Chuck Forsberg WA7KGX N2469R
wrote:
My Lucent antenna arrived today. I scrounged some adapters
and connected it to my Thunderbolt. Two birds were visible
with AMU > 4 when I held the antenna. My Droid 3 could not
see any birds through the wet roof.
The unit has some dings and scrapes but no visible corrosion.
I am tempted to take it apart but don't wish to break a unit
which seems to be working well.
Has anyone compared this antenna with the mushroom that came
from China with the used Thunderbolts???
--
Chuck Forsberg WA7KGX N2469R caf@omen.com www.omen.com
Developer of Industrial ZMODEM(Tm) for Embedded Applications
Omen Technology Inc "The High Reliability Software"
10255 NW Old Cornelius Pass Portland OR 97231 503-614-0430
time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to
https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.
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Bjorn,
My setup is a Lucent 26 dB antenna on a bracket on the edge of the roof at
the corner of my workshop feeding about 20 feet of 9913 coax (7.5 dB
attenuation per 100 feet @ 2.4 GHz) to a 58536A four way splitter that feeds
a Z3816A, Z3805A, TBolt, with a 'spare' for playing with. The splitter uses
about 2 feet of 9913 to the Z3816A and the Z3805A and the TBolt is fed with
about 6 feet of RG58 with BNC connectors and adapters for BNC to F and BNC
to N.
With SatStat and a Z3816A, C/N is typically 30 to 50. With TBoltMon or Lady
Heather and a TBolt, dBc also typically 30 to 50. I didn't see much
difference on either with switching antennas but I suspect I have a fair
amount of signal to start with (Lat of 30 degrees but under trees).
Joe
-----Original Message-----
From: time-nuts-bounces@febo.com [mailto:time-nuts-bounces@febo.com] On
Behalf Of bg@lysator.liu.se
Sent: Saturday, April 14, 2012 5:52 AM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] Lucent 40 dB Antenna
Hi Joe,
40dB is not needed when you have a short (<10m) /good antenna cable. Then
26dB will be plenty fine. Howver going to 20 or 30+ meters using standard
RG58 will be a problem with 26dB. Ofcause what matters is the attenuation
at L1 with your cable. Better cable can be longer...
You do not need an spectrum/network analyzer. Take a your antenna and
receiver to a good site, if you installation site might be marginal. Your
C/N0 (snr) should be around or above 50dBHz for high elevation satellites.
Then compare the C/N0 values for you antenna at your workshop, to see how
much worse than "perfect" that site is. If using a Tbolt remember to
change from Trimble AMU into dBHz.
Note that LNA dB amplification not generally translate direcly into dB
carrier to noise ratio.
--
Björn
PS I got a small batch of HP timing antennas new in box for around $25 a
piece some years ago... :-) DS
Mine arrived in the same manner. It works but I can't tell any real
difference between it and my 26 dB antenna, switching between them when
mounted on the corner of the roof of my workshop.
Joe
-----Original Message-----
From: time-nuts-bounces@febo.com [mailto:time-nuts-bounces@febo.com] On
Behalf Of Steve Krull
Sent: Friday, April 13, 2012 1:40 PM
To: time-nuts@febo.com
Subject: Re: [time-nuts] Lucent 40 dB Antenna
Just got mine, from "Just_for_survive" on eBay. Poorest packing job I've
ever seen for an international package. Three wraps of newsprint and a
thin padded envelope. I'll know this weekend if its operational.
Steve
On Tue, Apr 10, 2012 at 11:14 PM, Chuck Forsberg WA7KGX N2469R wrote:
My Lucent antenna arrived today. I scrounged some adapters
and connected it to my Thunderbolt. Two birds were visible
with AMU > 4 when I held the antenna. My Droid 3 could not
see any birds through the wet roof.
The unit has some dings and scrapes but no visible corrosion.
I am tempted to take it apart but don't wish to break a unit
which seems to be working well.
Has anyone compared this antenna with the mushroom that
came from China with the used Thunderbolts???
--
Chuck Forsberg WA7KGX N2469R caf@omen.com www.omen.com
Developer of Industrial ZMODEM(Tm) for Embedded Applications
Omen Technology Inc "The High Reliability Software"
10255 NW Old Cornelius Pass Portland OR 97231 503-614-0430
time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to
https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.
time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to
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I think I got lucky. Despite the almost nonexistent packing, my antenna looks like "reasonable wear and tear" for a used item and didn't suffer much from shipping, and it passed an operational check on the bench today. Setup was an 8566B SA as receiver, bias tee on the input, 5vdc to the antenna, and about 10 inches of RG8 to the Lucent antenna, which was hand held. The source was a GS-100 GPS simulator into a log periodic that was only designed for 400 - 1000MHz but it was what I had in reach. Distance between the source antenna and the DUT was about 12". A far from optimal, cobbled together setup but it was quick and easy. With the GS-100 output connected to the SA through 18" of RG8, the signal level was set to -70 dbm for a reference. When the aforementioned crude lash up was put in place with the antenna powered up, the signal level on the SA increased 10-12 db.
This was far from scientific but it gives me enough confidence that at next opportunity I can take it up into the attic for further testing.
Steve
On Apr 13, 2012, at 8:57 PM, Pete Lancashire pete@petelancashire.com wrote:
Here is what looks like from the inside
https://plus.google.com/u/0/photos/111617808980322733757/albums/5731068554075953249
Photo 2 and 3 show what impact to the screws to hold the two pieces
together can do.
-pete
On Fri, Apr 13, 2012 at 12:47 PM, Pete Lancashire
pete@petelancashire.com wrote:
That is the seller I got mine from. I still argee with Paul, unless you think
the seal between the two halves has been broken don't pull it apart. I'll
post the photos I took of mine. And when I get it back from being resealed
will see if it works or not (Should have done that first .. duh).
-pete
On Fri, Apr 13, 2012 at 11:39 AM, Steve Krull steve-krull@cox.net wrote:
Just got mine, from "Just_for_survive" on eBay. Poorest packing job I've
ever seen for an international package. Three wraps of newsprint and a thin
padded envelope. I'll know this weekend if its operational.
Steve
On Tue, Apr 10, 2012 at 11:14 PM, Chuck Forsberg WA7KGX N2469R wrote:
My Lucent antenna arrived today. I scrounged some adapters
and connected it to my Thunderbolt. Two birds were visible
with AMU > 4 when I held the antenna. My Droid 3 could not
see any birds through the wet roof.
The unit has some dings and scrapes but no visible corrosion.
I am tempted to take it apart but don't wish to break a unit
which seems to be working well.
Has anyone compared this antenna with the mushroom that
came from China with the used Thunderbolts???
--
Chuck Forsberg WA7KGX N2469R caf@omen.com www.omen.com
Developer of Industrial ZMODEM(Tm) for Embedded Applications
Omen Technology Inc "The High Reliability Software"
10255 NW Old Cornelius Pass Portland OR 97231 503-614-0430
time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to
https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.
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and follow the instructions there.
RAF Mormond Hill in Scotland, and what was referred to back then as
"Site 41, NATO, Location Classified". Getting there and back was a real
hoot, and all my expense reports said on them was "Top Secret - pay as
recorded, no receipts allowed"
I was told that just before decommissioning in (I think) 1992, NATO, the
Danish Air Force, and the USAF acknowledged the presence of a "radar and
communications station known as Site 41" in the Faeroe Islands. There
was also a LORAN-C station there, and some Navy comm equipment of some
sort in one of the tropo radio rooms. Don't know why the location was
classified - the Russian Navy watched it being built and monitored it
continuously...
Steve
On 4/13/2012 9:09 PM, J. L. Trantham wrote:
Where did you do troposcatter? I was a co-op student with AT&T and worked
on their troposcatter system from Homestead, FL, to Nassau, Bahamas.
Joe
-----Original Message-----
From: time-nuts-bounces@febo.com [mailto:time-nuts-bounces@febo.com] On
Behalf Of Steve Krull
Sent: Friday, April 13, 2012 8:06 PM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] Lucent 40 dB Antenna
Too bad there wasn't an amateur radio allocation at 902 MHz in the early
1970's - the troposcatter stations I serviced would have been awesome -
2x 10Kw into paired 60' dishes, but no az or el control!
73,
Steve
On 4/13/2012 7:50 PM, paul swed wrote:
Hmmm nat hist. Makes for a good challenge.
I was successful in the Navy at hiding antennas on the ships mast and
barracks.
Suspect I could have had a bit more trouble as I think about it these
days.
Regards
Paul
On Fri, Apr 13, 2012 at 8:31 PM, Stevesteve-krull@cox.net wrote:
Paul,
I believe I read in an earlier post that someone was using one of these
with a Tbolt, which is 5 volts to the antenna. Hope I'm not mistaken! I
didn't hear any rattles when I shook the unit so I'm keeping my fingers
crossed. They do appear to be pretty rugged so I'm hoping for the best.
The
reply from the seller ignored my poor packing complaint and said "this is
used, it can not all are the same. our guaranteed is you can ask for
refund
if it can not works." I assume they have a boatload of them bought very
cheaply and they are playing the odds that they will make more from
replacing a few that don't survive shipping than they would if they spent
a
bit more on packing material for all shipments.
We live in a National Historic District so no outdoor antennas here. My
antennas are in the attic above the third floor, putting them about 40 ft
AGL. So far the shingled roof hasn't been a major obstacle and the GPS
antennas are above the HVAC ductwork. I'll see if there's any difference
between this antenna and the HP that's on the Z3816 now.
73,
Steve
WB0DBS
On Apr 13, 2012, at 1:52 PM, paul swedpaulswedb@gmail.com wrote:
Steve will be interesting to hear how it goes. Thats a reasonable price
it
seems and the antenna looks like it could handle abuse pretty well. Any
idea if its a 5 volt unit or actually any other detail?
Regards
Paul
WB8TSL
On Fri, Apr 13, 2012 at 2:39 PM, Steve Krullsteve-krull@cox.net
wrote:
Just got mine, from "Just_for_survive" on eBay. Poorest packing job
I've
ever seen for an international package. Three wraps of newsprint and a
thin
padded envelope. I'll know this weekend if its operational.
Steve
On Tue, Apr 10, 2012 at 11:14 PM, Chuck Forsberg WA7KGX N2469R wrote:
My Lucent antenna arrived today. I scrounged some adapters
and connected it to my Thunderbolt. Two birds were visible
with AMU> 4 when I held the antenna. My Droid 3 could not
see any birds through the wet roof.
The unit has some dings and scrapes but no visible corrosion.
I am tempted to take it apart but don't wish to break a unit
which seems to be working well.
Has anyone compared this antenna with the mushroom that
came from China with the used Thunderbolts???
--
Chuck Forsberg WA7KGX N2469R caf@omen.com www.omen.com
Developer of Industrial ZMODEM(Tm) for Embedded Applications
Omen Technology Inc "The High Reliability Software"
10255 NW Old Cornelius Pass Portland OR 97231 503-614-0430
_____________**
time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to https://www.febo.com/cgi-bin/**
mailman/listinfo/time-nuts<
and follow the instructions there.
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To unsubscribe, go to https://www.febo.com/cgi-bin/**
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and follow the instructions there.
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Is everyone buying these because they have 40dB gain or because they are
the only reasonably priced GPS timing antennas on eBay right now?
Thomas Knox
Thomas,
I bought mine because of the gain, but on +5V it performs worse than a "38
dBi" antenna, quite a lot worse. I'm wonder whether it needs more volts,
or whether it's simply broken. It was ex-equipment, and not in very good
shape, but it was described as "used" so I'll just write off the loss, I
suppose.
BTW: I did appreciate the discussion on Chinese 'scopes - I ended up
getting a DS1052E and I'm delighted with it, considering the price.
SatSignal software - quality software written to your requirements
Web: http://www.satsignal.eu
Email: david-taylor@blueyonder.co.uk
On 04/24/2012 07:40 AM, David J Taylor wrote:
Is everyone buying these because they have 40dB gain or because they
are the only reasonably priced GPS timing antennas on eBay right now?
Thomas Knox
Thomas,
I bought mine because of the gain, but on +5V it performs worse than a
"38 dBi" antenna, quite a lot worse. I'm wonder whether it needs more
volts, or whether it's simply broken. It was ex-equipment, and not in
very good shape, but it was described as "used" so I'll just write off
the loss, I suppose.
BTW: I did appreciate the discussion on Chinese 'scopes - I ended up
getting a DS1052E and I'm delighted with it, considering the price.
Cheers,
David
My Tbolt with a Lucent 40 dB antenna was able to pick up two birds in
my office during a rainy period.
A Droid held next to it did not see any birds.
I have not gotten around to trying the Lucent outside.
--
Chuck Forsberg WA7KGX N2469R caf@omen.com www.omen.com
Developer of Industrial ZMODEM(Tm) for Embedded Applications
Omen Technology Inc "The High Reliability Software"
10255 NW Old Cornelius Pass Portland OR 97231 503-614-0430