I am co located on a tower with an FM transmitter. The FM station runs
at 105Mhz. We were running one AP at 10 half duplex to overcome the
havoc that the FM station created on our ethernet feed. We now need to
run that link at 100 full duplex to be able to handle the traffic
coming through it. Wha
We are located at 400 foot on a FM tower, 100,000 watts at the top of 1400
foot.
The total length of CAT 5 is 440 foot or so, and plug directly into a RB532
at the top of the tower (power at the top as well)
We ran a felexable conduit up the tower, inside, 16awg solid copper, one
black, one whit
I did run on the other leg opsite of the transmistion line. We are
above the FM radio antenna so our CAT5 run passes the back side of at
25,000 watt transmitter.
Why the 110v in that conduit?
On 5/22/07, Dennis Burgess <[EMAIL PROTECTED]> wrote:
We are located at 400 foot on a FM tower, 100,000
Again,
Check your local code before you copy this. No ground is not allowed
here, unless somehow you can prove it is a temporary extension cord.
Neither is low voltage in same conduit at 120VAC.
That said, small changes to Dennis' configuration will make good
installation.
Run the cat5 in
So how do you secure the conduit to the tower legs? Zip ties?
On 5/22/07, Scott Reed <[EMAIL PROTECTED]> wrote:
Again,
Check your local code before you copy this. No ground is not allowed
here, unless somehow you can prove it is a temporary extension cord.
Neither is low voltage in same conduit
Would going to fiber help? I use these to separate my ground equipment
from tower equipment to avoid lightning damage:
http://www.sfcable.com/cable/p/LKS-MC110SC.html
One of the uses listed in their instructions is to avoid electrical
noise through industrial environments. So far they work j
YOU DO NOT WANT TO RUN A GROUND WIRE! The reason for that, is that then it
gives lightning etc the ability to go though your equipment vs the tower
ground! B
On 5/22/07, Scott Reed <[EMAIL PROTECTED]> wrote:
Again,
Check your local code before you copy this. No ground is not allowed
here,
If properly grounded, the opposite is true. The ground wire should
direct the lightning to ground (hence the name) and away from your
equipment.
Not to mention that in the case of an equipment failure that causes the
power supply to put 120VAC on the case, etc., the ground wire directs
the c
s well grounded
appear to do well but the local ordinances need to be heeded.
. . . j o n a t h a n
-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On
Behalf Of Scott Reed
Sent: Tuesday, May 22, 2007 5:35 PM
To: [EMAIL PROTECTED]; WISPA General List
Subject: Re: [WIS
l List
Subject: Re: [WISPA] FM Radio and Ethernet
If properly grounded, the opposite is true. The ground wire should
direct the lightning to ground (hence the name) and away from your
equipment.
Not to mention that in the case of an equipment failure that causes the
power supply to put 120VAC
: 281-352-8214
-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On
Behalf Of Scott Reed
Sent: Tuesday, May 22, 2007 8:33 PM
To: WISPA General List
Subject: Re: [WISPA] FM Radio and Ethernet
Nothing stops direct hits. A spark that traveled through miles of air
isn&#
L PROTECTED] [mailto:[EMAIL PROTECTED] On
> Behalf Of Scott Reed
> Sent: Tuesday, May 22, 2007 5:35 PM
> To: [EMAIL PROTECTED]; WISPA General List
> Subject: Re: [WISPA] FM Radio and Ethernet
>
> If properly grounded, the opposite is true. The ground wire should
> direct the light
I am 54. My grandma (94) tells a story about lightening and my mother
(73) verifies it.
In the olden days (when men were men and sheep ran scared), grandpa ran
a phone line thru the brush for a few miles to get to the homestead on
the ranch. It was only a few feet off the ground, say ten may
From: "Scott Reed" <[EMAIL PROTECTED]>
To: "WISPA General List"
Sent: Tuesday, May 22, 2007 8:32 PM
Subject: Re: [WISPA] FM Radio and Ethernet
Nothing stops direct hits. A spark that traveled through miles of air
isn't really going to care what else is betwe
ke Hammett
Intelligent Computing Solutions
http://www.ics-il.com
- Original Message - From: "Scott Reed" <[EMAIL PROTECTED]>
To: "WISPA General List"
Sent: Tuesday, May 22, 2007 8:32 PM
Subject: Re: [WISPA] FM Radio and Ethernet
Nothing stops direct hits. A spar
, May 23, 2007 10:24 AM
Subject: Re: [WISPA] FM Radio and Ethernet
Mike Hammett wrote:
Why is it, then, that there aren't more radio\TV station outages due to
lightning? They have to have done something to reduce their chances of a
direct hit on those 1200' towers.
A good groundin
skine (804) 436-9428"
<[EMAIL PROTECTED]>
To: "WISPA General List"
Sent: Wednesday, May 23, 2007 10:24 AM
Subject: Re: [WISPA] FM Radio and Ethernet
Mike Hammett wrote:
Why is it, then, that there aren't more radio\TV station outages due
to lightning? They have
arges.
JohnnyO
- Original Message -
From: "Michael Erskine (804) 436-9428" <[EMAIL PROTECTED]>
To: "WISPA General List"
Sent: Wednesday, May 23, 2007 11:02 AM
Subject: Re: [WISPA] FM Radio and Ethernet
Mike Hammett wrote:
Then why don't WISPs deploy a pro
ttp://www.ics-il.com
- Original Message - From: "Scott Reed" <[EMAIL PROTECTED]>
To: "WISPA General List"
Sent: Tuesday, May 22, 2007 8:32 PM
Subject: Re: [WISPA] FM Radio and Ethernet
Nothing stops direct hits. A spark that traveled through miles of
air isn't r
We have one tower, that as a test, we did not do any grounds other than the
power ground. Everything else is grounded by "default". What I mean is the
mast attached to the tower is grounded simply because it is attached to the
tower, etc.
This site has been up for 2 years with no issues. The lu
After many hits, I ungrounded, added inductance and lots and lots of surge
suppression (not little ethernet supressors) - my experience (or luck) has
been that it is better to un-ground. My location has 100 percent clay soil
(clay was used as an insulator in the old days), so that may be a factor
There's been a lot of talk in here about how to ground the towers. I
hope everybody's actually read up on the topic, but just in case someone
isn't, get a book. Don't guess.
Proper grounding is hard. It's expensive.
One such book is put out by PolyPhaser. It's obviously biased toward
using th
I forgot to mention, most of the lightning damage (more than 90 percent) I
have had has been after long periods with no rain, so the clay had a lot of
time to dry out and turn in to an insulator. One Summer my main tower and
about 10 percent of my clients were destroyed from one lightning storm.
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