The Utah VHF Society
"So, you want to
put
up a repeater?"
or
"I have a lot of time
to kill and a big wad of cash burning a hole in my
wallet..."
Ok. Somehow you've gotten to the point of deciding that you
want to put up a repeater. At the moment of this
realization, you
should ask yourself two questions:
- Am I crazy?
- Was I dropped on my head when I was really
young?
How a
coordination happens:
Here are the steps typically
required to obtain repeater coordination:
- A potential repeater trustee
decides that there is a need
for a
repeater
in a particular location to fill a yet-unfilled
requirement for service
and/or coverage.
- Read this document,
the Policies
of
the Frequency Coordinator, the Frequency
Coordination FAQ, and the Frequency
Coordination
Form. Preliminarily fill out the Frequency
Coordination
form and make note of any questions that this might
bring up.
- Contact the frequency coordinator
informally via telephone
or email and
explain your needs. Remember that the Frequency
Coordinator is
charged
with coordinating frequencies so that they will do the
most good - and
it is possible that your idea, while it might be
sound, may be asking
too
much of limited resources.
- This first contact with the
frequency coordinator may
reveal that your
original idea was or was not practical and you may
need to revise your
plans.
- If you are able to derive a plan
that will fit within
available
resources,
you may then submit the completed Frequency
Coordination Form
and sign
and mail it to the frequency coordinator.
While email
submissions
are permitted for minor updates and informal
notifications, a
paper
trail (with real paper!) is an
invaluable resource
should
some (unforeseen!) issue arise in the future.
- Remember: While you may make
suggestions of
frequencies
that
you might operate on, it is the frequency coordinator
that makes the
final
determination. The frequency coordinator has an
extensive
database and relies on this information and experience
to determine a
suitable
frequency/location combination. It is
entirely possible that nothing
is available for your needs (as is the likely case
of 2 meters along
the
Wasatch Front.)
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After answering these questions to your
satisfaction (or simply
ignoring
them and thereby proving that there may be something to them...)
there
are several other questions that you need to ask.
- What wonderful thing will this
repeater do that other
repeaters
around me do not do.
- Do we (as a ham community) really need another
repeater?
- Is there a repeater near you in where the
owner could really
use
some help in improving, rather than you duplicating
some effort?
- Can I really afford to spend the
time/money that it takes
to
get
a site (and permission,) put a repeater on the air, and
keep it
running?
- Do I even know how to do any of this?
Before going further, let me state a few simple facts:
- There are far too many repeaters in many
metro areas and most of
these
are rarely used!
- There are a lot of repeaters that have
turned into private
intercom
frequencies
where no-one is welcome except for a small, select
group.
Sometimes
this exclusivity is compounded by the existence of an
autopatch.
- There are too many repeaters that are
poorly located (i.e. a low
valley
location) and/or poorly maintained (making them difficult to
get into)
and are all but useless.
In short, if there is a group or individual that can
put
up a repeater/system that will genuinely benefit the ham community
(i.e.
provide or improve a service or further the state-of-the art)
he/she is
often prevented from doing so by a number of mediocre or poor
repeaters
tying up frequencies.
Now don't go away assuming that the answer to
a frequency
coordination
request will automatically be no. Think carefully
about
what
it is that you are trying to accomplish. Quite
frankly, if
you
want to put up a 2 meter repeater at your house with an
autopatch on it
for your personal use, you should really ask yourself if this
is a good
use of (already tight) resources!
If your intents are really altruistic
(i.e. you genuinely
wish
to help the amateur community by providing a genuinely valuable
service,
cover an area that isn't already covered well, demonstrate a new
aspect
of the communications technology, or something else that
dovetails
nicely
into the basis and purpose of amateur radio) then there are
numerous
groups
and individuals that already have their repeaters on the
air. You
may be able to offer your help or expertise to improve that
system.
It may be possible that you have identified a repeater that,
well,
"needs
help." In this case, befriending the owner/operator of
that
system
may prove productive
Assuming that you can justify (to yourself and
the ham community at
large) the need for yet another repeater, it needs to be
coordinated.
First, read the Frequency
Coordination
FAQ (Frequently Asked Questions) page. Then,
read
it again. Then make sure you read the frequency
coordination policies page. It is on this latter
page that
the
bulk of this document is based.
The frequency coordinator is
your friend!
Putting up even a "low-budget" repeater is
time-consuming and can still be fairly expensive, so before you
start spending much time or money on a repeater or the
equipment, please contact the repeater coordinator
to determine if what you propose is practical! One of the
worst things that can happen - and it happens too frequently -
is that someone buys the gear for a repeater somewhere and,
having spent the time and money, finds out that it's not going
to work out - perhaps because there's no frequency available,
the location that was planned for the repeater (say, the house)
is just not very good - or, perhaps too good for "local"
coverage, or because of some other technical issue that a
first-time repeater owner may not have been able to foresee!
PLEASE work with the frequency
coordinator to learn the "ins and outs" before
you spend the money and time! If your proposed repeater
turns out to be practical, there's a good chance that the
coordinator can offer advice that would improve the repeater's
performance and even save you money on the equipment when you do
buy it!
In the process of supplying coordination
information there may be some aspects/parameters with which you
may not be familiar or need help in determining: Again,
the coordinator is there to help you!
Supplying Coordination Information:
In order to make an
informed decision, both you
and
the coordinator must have complete and accurate
information.
Here is an overview on a point-by-point basis:
- An applicant for coordination may request a
certain frequency.
However
the final decision will rest with the Frequency Coordinator.
If you request a frequency, you had better have
done
your due diligence to make sure that this frequency and
the
proposed
location of the repeater are compatible with other systems.
Again,
the frequency coordinator is under no obligation to
coordinate
to
you the specific frequency that you request.
- An applicant may wish to share a frequency
with another existing
system,
by whatever means, and Letters from all parties concerned (and
those
parties
are to be determined by the Frequency Coordinator) should be
submitted
with the application for coordination. Coordination of a
Repeater
Pair, Control Link, Aux Link, etc. is for a specific:
What is "HAAT?"
HAAT stands for Height Above
Average Terrain.
This number is derived from a contour maps (such as 7.5
minute USGS
maps.)
It is the "average" height of the land around the site
based on the
averaging
of the elevation of points on lines extending out for 10
miles,
starting
at 2 miles, and the elevation at each one mile increment
on the eight
cardinal
compass points. This means 9 points per radial, or
the average of
72 data points. This value could be either
be positive
(if
the site is atop a peak) or negative (if the repeater is
in a valley
location.)
If you do not have this information,
the frequency
coordinator can calculate
it, provided that an accurate
description of the
location
(site name, precise latitude and longitude - from GPS,
etc.) is given.
If you wish to have the coordinator
calculate HAAT and a few other parameters, he'll be
happy to help!
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- Frequency or Frequencies
- Transmitter Location
- Receiver Location
- Effective Radiated Power (ERP)
- Radiation Pattern
- Elevation (HAAT)
- Owner (Club or Individual)
- Time Frame
- Subaudible tone access frequency
Frequency sharing is
encouraged
by the Frequency Coordinator. However, frequency sharing
will be
done only where it makes technical sense and there is agreement (in
writing!) from all parties involved. It should
also be
remembered
that the earlier coordination on the frequency has seniority and
will
be
given first consideration should problems arise.
- All coordinations are for a THREE Month
Period. It is the
Responsibility
of the applicant to notify the Utah VHF Society Frequency
Coordinator
Immediately,
in writing, when the coordinated frequencies go into use.
Failure to
notify
the Frequency Coordinator after THREE months or failure to
request an
extension,
will result in cancellation of the coordination.
This three-month period is intended to prevent people from getting
a
coordinated
frequency and then sitting on it, doing nothing. Consider
it to
be
an incentive to action and getting the repeater on the air.
- Final Coordination is based on all data
available to the
Frequency
Coordinator
at the time. It is not a guarantee of a clear frequency.
Suitability of
the frequency or frequencies shall be determined by the
applicant.
This simply means that, in spite of every
precaution
and all research done, just because the frequency coordinator may
approve
the coordination, it does not mean that everything is
guaranteed
to be perfect. Occasionally, there is a hitherto unknown
interference
issue with another system. It is on this point that thorough
research
on the part of the person asking for the coordination and the
experience
of the coordinator can make the difference between a system that
will
work,
and one that will not.
- It is the responsibility of the coordinated
party to keep the
Frequency
Coordinator informed of the status of their Repeater at all
times. Lack
of or insufficient information is counterproductive to and may
delay
the
coordination process.
This should be self-explanatory. It does
no
one
a service to try to keep the details of a repeater system
secret.
If you request that the frequency coordinator do so, certain
details of
the proposed system (such as link frequencies, subaudible tone
frequencies,
system topologies, etc.) may be kept confidential, provided that
it is
appropriate to do so. (This may be particularly true in some
circumstances,
especially where certain negotiations - such as site agreements -
may
be
jeopardized by their being made public prior to their
finalization.)
- A frequency coordinated for a new Repeater
is made with respect
to a
specific
planned location, height and expected coverage area. It is not
an
assignment
to the Repeater Operator for unspecified use. Directional
antenna
systems
and sub-audible tone access, where appropriate, may be an
essential
part
of a given coordination.
All frequency coordinations are based on the
information
supplied at the time of the coordination. If, say, a certain
frequency
is coordinated for a foothill location (one that sees a valley,
but is
not on top of a mountain) then that particular frequency may not
be
suitable
for use on a mountaintop, owing to possible interference
issues.
In situations where there is geographical frequency re-use, the
use of
directional antennas or a site with limited coverage may be
dictated
(according
to arrangement with the frequency coordinator and the other
parties
with
which the frequency is being shared) to minimize
interference.
While
these factors may reduce coverage area, it may be necessary if you
wish
to have any coverage at all.
- All major facility changes affecting the
coverage of a given
repeater
output
or the area from which the repeater will attract input
transmissions,
are
the cause for a new coordination. Any of the following changes
require
re-coordination:
- Transmitter Location Change
- Receiver Location Change
- Addition of Remote Receivers
- Effective Radiated Power Change
- Antenna Elevation Change (HAAT)
- Antenna Radiation Pattern Change
- Ownership Change (Club or Individual)
Again, most of these are self-explanatory, but
if you have questions on any of these points, please contact the
frequency coordinator for help.
Since
the coordination is based on the use of that frequency in
that
location with that equipment, changing that
(whatever that
is...) will affect its operation (and possibly the operations of
other
systems.) Additionally, keeping the Frequency Coordinator
apprised
of changes allows the coordinator to be an effective clearinghouse
for
information, and to spot potential problems before they happen.
- If a coordinated system becomes inactive
for a period of SIX
Months and
the Frequency Coordinator has not been notified, IN WRITING,
then the
coordinated
frequencies will be subject to reassignment.
If your repeater system goes off the air for
any
reason,
it is your responsibility to establish a paper trail to
explain
what happened, and when (or if) the system will go back on the
air.
This is another procedure to help keep "paper" repeaters from
tying up
frequencies. Extended outages of repeaters here in the west
are,
unfortunately, somewhat common owing to the inaccessibility of
some
sites
during the winter months. The frequency coordinator will
consider
these extenuating circumstances as appropriate.
- Coordination requires cooperation. The Utah
VHF Society is a
cooperative
venture, whose success or failure is determined by the
cooperation of
those
who it is working for. The amateur bands are a finite resource
that can
support a large amount of relay activity operating in a
harmonious
manner,
provided all parties realize that, like the environment, it is
a
fragile
entity, and abuse can spoil it for everyone.
- Please send your applications for
Frequency Coordination and
any
comments
to:
Utah VHF Society Frequency Coordinator
John Lloyd, K7JL
2078 Kramer Drive
Sandy, Utah 84092
Click
here
for the email address
Home: 801-943-8830 Work: 801-268-5819
While every attempt has been made to make this page as informative
and
clear as possible, it is likely that something was
overlooked. In
matters of policy, the ultimate authority is a document
called The
Policies of the Frequency Coordinator and its
interpretation by the
frequency coordinator, not this document.
You may obtain a copy of the Frequency
Coordination form by
following
this
link.
Some of your questions may be answered on
the Frequency
Coordination
FAQ (Frequently Asked Questions) page.
Questions, updates, or comments pertaining
to this web page may
be
directed to: uvhfs@utahvhfs.org
Go to the Frequency
Coordination Policies page or the Utah
VHF
Society
home page.
This page was last updated
on 20121221