I'm not using any at the moment, but then all my GPS antennae are indoors
(long story!).
Have been involved with supplying protection to clients over the years, and
in the main, have been RF surge suppressor devices such as used by Meinberg
http://www.meinberg.de/english/products/cn_ube.htm
My Trimble ACE-III Has been tracking PRN32. Works AOK.
Bruce
- Original Message -
From: Morris Odell [EMAIL PROTECTED]
To: time-nuts@febo.com
Sent: Friday, February 29, 2008 1:22 AM
Subject: Re: [time-nuts] SVN23/PRN32 useable
Date: Wed, 27 Feb 2008 12:49:40 +0100 (CET)
From: Magnus
At 04:40 PM 2/28/2008, Matthew Smith wrote...
Is anyone implementing any form of lightning protection for their
GPS-attached equipment?
I use an arrestor, something like this:
http://www.alphadeltacom.com/tt3g50.html . That's not the brand I have,
but it's similar.
Have a pair of HP 58532 GPS antennas mounted four feet apart
on an outdoor mast that is below the horizon due to hills.
Bought a 100 foot roll of RG-8U, cut it in half and attached
N connectors to both ends. Physical distance from radio to
antenna is about 40 feet, but I wanted identical lengths.
I have lightning protector that uses those gas tubes. I have yet to hook it
up though... My GPS antenna is mounted on a metal building so I'm probably a
prime candidate for a lightning attractor. The antenna is mounted on a
plastic pole giving a little isolation from the building itself though...
RF gas-based lightning surge protectors are widely available;
look on eBay for items with words like:
Huber Suhner
Polyphaser
EMP surge lightning suppressor protector RGT gas
For example,
http://search.ebay.com/search/search.dll?satitle=Polyphaser+protector
Hi all,
I wonder if anyone can help me with a problem I'm having with a VP Oncore
receiver
I am building something which includes one of these receivers and it
communicates with the host microcontroller via the VP's serial binary link.
The host receives messages from the VP just fine. The
ICE Electronics also has a line of surge protectors. Unlike others, they
include a resistor to ground to bleed off static build-up. I se these
on all my antennas.
73, Dick, W1KSZ
-Original Message-
From: Tom Van Baak [EMAIL PROTECTED]
Sent: Feb 29, 2008 3:50 PM
To: Discussion of precise
TVB Et al,
In my experience (horror stories from the field) they have worked well. RF
characteristics are pretty good for all. I have used several of the Citel
units myself.
Remember, the surge protector will do ABSOLUTELY NOTHING to protect the
antenna. Their sole intent is to prevent large
Morris,
Are you getting real responses, or is the VP just reporting its current
settings? If it receives a message it does not recognize due to formatting
errors it will just report what its current settings are instead of acting
on the command. I'm not sure what would happen if it got a series
Hi Tom,
couple of problems with these gas discharge devices: they need a significant
voltage to trip, and usually may only help when the hit is a vicinity hit,
not a direct hit. For direct hits, the goal is to prevent human casualties,
and fires. I don't think any sensitive RF receiver
Quoth randy warner at 2008-03-01 09:51...
...
Remember, the surge protector will do ABSOLUTELY NOTHING to protect the
antenna. Their sole intent is to prevent large surges from getting into your
electronics, house wiring, fingers, toes, etc. The receiver will be toast
most likely, unless the
Hi Matt,
this may not work for you, but the new receivers coming onto the market are
amazingly sensitive.
I get full signal strength inside our wooden house on a Sirf-based receiver
we are evaluating. I also get 8 Sats and more inside a metal building where we
don't even get Cell-phone
Hi!
So, now the report of GPS failures due to SVN23/PRN32 starts to show up...
lots of Swedish Sea-authority had several of their ships dissapearing from
the AIS system on Wen. They already claim correlationto SVN23/PRN32 set to
healthy...
Forgot to mention,
I put that diode and inductor inside my HP GPS Distribution amps
retrofitting all of them, it fits quite well. HP uses a similar inductor (but
smaller
current capacity) to feed antenna power into the Antenna, so the effect of
this
is negligible.
But caveat-emptor:
Hello The Net:
At one time the ICE lightning arrestors did not pass DC, so DC on the
coax center conductor
will be blocked and will not get to the preamplifier, up front at the
antenna element.
Other lightning arrestors are simply a 50 ohm coaxial line with a gas
discharge tube
between the
Hi All, all the comment has been about in-line protectors so far. We in the
UK do dot have the ferocity of lightning that is seen in some parts of the
USA but surely like all problems prevention is better. It is probably not
100% but would it not be better to have a higher metal rod say 6 feet
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