Subject: (Curry) (Karow) FW thanks and more info request (fwd)
Date: Thu, 6 May 1999 192129 -0500 (CDT)
From: "Roy L. Beavers" <rbeavers@llion.org>
To: emfguru <rbeavers@llion.org>
--------------------------------------------------
---------- Forwarded message ----------
Date: Thu, 06 May 1999 16:21:03 -0700
From: "Bill P. Curry"
To: "Roy L. Beavers"
Subject: Re: (Karow) FW: thanks and more info request (fwd)
Roy and Hans,
I would like to add to Hans' response to Susan's inquiry, that you should
also find out what kind of antenna is planned. Some communications towers use
microwave dishes that look like drums (because of the weatherproofing
protective structure around the antenna). If so, a well defined beam is
formed and, as long as it is maintained within its original design parameters,
it will probably be too high to bother you - but might trouble someone living
higher than your elevation.
On the other hand, if the antenna structure is a set of sector antennas
(as are often used for cell phone base stations) there will be preferred
radiation directions, and the antenna emissions will be higher in those
directions than in some others. In such a case, ask what the high gain
directions are and what is the gain. The gain (in decibels) is defined
as 10 times the logarithm of the ratio of the actual radiation density
to the radiation density that would occur if all radiation were emitted
equally in all directions at the same power.
For example, if the antenna has a gain of 13 decibels in a particular
direction, the raidation density is 20 times the radiation density that
would be true of an equal direction (or isotropic) radiator at the same
power. If there are simultaneously operating multiple channels (i.e.,
frequency increments in the range of operating frequencies allocated to
this installation) and there are high gain antennas, the effective
radiated power in the direction of maximum emission will be the
product of the power into each channel times the number of channels times the
gain of the antenna. In this way, the modest power level of 4 watts that you
mentioned could be much larger effective radiated power.
Suppose there are 50 channels and a gain of a factor of 20, then the
effective radiated power would be 4,000 watts - and this is a fairly
modest level by industry standards!
Also, when they say that an almost undetectable level of RF radiation will
occur near the tower, ask how much and get them to put it in writing.
Depending on how much background radiaton is already there, you should
probably consider anything above a fraction of a microwatt per square
centimenter as significant. (I live in an area where we already have measured
radiation levels between 1/2 and 2 microwatts per square centimeter, owing to
the presence of a strong UHF TV signal at 600 MHz frequency, a sheriff's
communication facility, a microwave relay facility and several cell phone
antennas on water tanks and other structures, not to mention FM bradcast
facilities.) Because I live on a hillside, we get much stronger radiation
level than folks at lower elevations, where I have measured as little as 0.15
microwatt per square centimeter. Thus, it would probably be advisable for you
to get someone (probably an RF engineer) with an RF radiaton survey instrument
to measure the background level and the dominant frequency before the
communication tower is installed and again after it is installed.
If the radiation levels exceed what the company promises, they can be put
under pressure to rectify the situation - perhaps even remove the tower.
Roy L. Beavers wrote:
>
> ......It seems that Hans has also forwarded an answer to Susan
> Galvin-Noonan. (See the previous message from guru, just sent.)
>
> His suggestions are sound in my opinion..... I particularly note
> items 4 and 5......
>
> Roy Beavers (EMFguru)
> rbeavers@llion.org................
> ...It is better to light a single candle than to curse the darkness...
> .................PEOPLE ARE MORE IMPORTANT THAN PROFITS...............
>
> .......DO YOU KNOW OF OTHERS WHO SHOULD BE ON THIS LIST?????...........
>
> ---------- Forwarded message ----------
> Date: Wed, 5 May 1999 20:10:37 -0700
> From: Hans Karow
> To: "'rbeavers@llion.org'"
> Subject: FW: thanks and more info request
>
> Roy, the thanks and compliments (see e-mail below) I pass to you!
> There you are: "You reep what You sow! "And reep you will, more and more,
> Roy, you deserved it!
>
> As a matter of fact, it's kind of sad that we -you must not think so!-
> almost take all your work for granted.
> NOT SO!
> I remember some time ago, all of a sudden for no apparent reason known to
> me, there were no messages arriving from Roy for days and days, and I
> checked every day finding myself empty! That's, when someone wonders about
> Roy and misses him badly, that's a moment to become aware to take things
> not for granted and once and a while to say THANK YOU!
>
> Roy: THANK YOU!" from me,and I am sure I say this for others as well.
> Please keep on going with emf-guru, a fine site, which helped more people
> than even Roy can think of!
>
> Hans..
> xxxxxxxxxxxxxxxxxxxxxxxxxxxxx
>
> Someone might want to help Susan below, I have never come across a case
> like that.
>
> I suggest:
>
> 1. find out, how many channels are operating on this tower
> 2 find out, what the guaranteed wattage is with each channel (add the
> wattage, then you have the real output of this tower)
> 3 find out which frequencies are used
> 4. get a guaranteed statement, that wattage, number of channels,
> frequencies will not be changed, if so, only with a public hearing
>
> 5 insist that -on the company's cost- you may hire a technician of your
> choice any time at least twice a year (without notification to the
> company) and check for the out put and frequencies
>
> If the company has any objection to above points, then you know, they are
> hiding something and don't like to take any responsibilties at a later
> date!
>
> Hans.
>
> -----Original Message-----
> From: Gavin Noonan [SMTP:gnoonan@telusplanet.net]
> Sent: May 5, 1999 1:50 PM
> To: core@vip.net
> Subject: thanks and more info request
>
> Hans, thank you so much for the information you have sent me and putting
> me on the emf guru site. It is very informative and eye opening. A
> group of us in our neighborhood have been meeting as a result of the
> Telus tower incident. We have been told that the city will not sign a
> lease in this area because of public concerns so Telus has to come up
> with another option.
>
> Now we have a new public notice that a communications tower is being
> proposed. It is to be placed next to a school board office which is
> between two schools. The purpose of this tower we are told is to
> improve communications between the schools - and apparently all schools
> will be "gifted" with one of these. This tower is said to be aprox. 30
> metres high, freestanding, with no guy wires and no lighting. It says,
> in the public notice, that the tower's transmission is not broadcast in
> all directions like a cellular phone tower but is a focused receiver.
> The bulletin says that the power output is very low ( ie max. 4 watts)
> and The communication company Telebyte Inc. advises there is little if
> any RF transmission detectable in the vicinity of the tower.
>
> Hans, what do you know, is there a concern here?
>
> Also I did not recieve the fax you were going to send from Dr. Holt, I
> look forward to receiving any information you can send me and feel that
> would be of interest and use to me. I am certainly grateful for your
> enthusiastic energy in helping spread the word about our responsiblity
> in Industry and our's and our environmental future. Keep up the great
> work.
>
> Susan Spyker-Noonan
> fax 403 340-5173 attention Gavin Noonan
--
----
Bill P. Curry, Ph.D. |Physics is fun.
EMSciTek Consulting Co. |Trying to make a living!
22W101 McCarron Road, |Phone: (630) 858-9377
Glen Ellyn, IL 60137 |Fax: same, but require prior notice
Home page: http://www.EMSciTek.com
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Reprinted with permission of Roy Beavers, http://www.feb.se/EMF-L/EMF-L.html