So, you want to build a repeater?
The Repeater Builder's Technical
Information Page® is an informational help site by Kevin Custer WJ8G.
This is the largest repeater information site in the world!
Below is a Google ad (to help pay the bandwidth and hosting bill). No endorsement of
the products is implied.
Donations are appreciated for the continued availability and upkeep
of this site. We have over 9,000 publicly-accessible files occupying
10GB of server space. All of it is freely downloadable information,
and our server transfers (i.e. downloads) over 250GB per month!
The repeater-builder Yahoogroup that is associated with this web site has
over 5,200 members worldwide and is a tremendous resource of technical
knowledge on repeaters and repeater-building, be they amateur, commercial,
GMRS, public safety, CAP, or ...
The contents of the information pages at this web site are totally
dependent on donations of information. If you have expertise on a
particular piece of equipment, or detailed knowledge on a topic,
please consider contributing an article or two to this web site.
This web site is privately owned and operated; all financial support
comes from donations from individuals. There is little advertising on
this web site except for a few small amateur-owned companies that
manufacture boards and parts of interest to the repeater community,
and a few Google ads like the one above that help pay the hosting
Please help support this site.
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We accept most Credit Cards via Pay-Pal.
Remember seeing something you are interested in but can't
Search Engine to find it!
Type your search terms in the box above to search this site.
Due to the fact that we are using the free Google search there will be advertisements in
the Google search results.
The Concept of This Site:
- To educate: As an example, "What's a repeater?"
- To supply quality information relating to amateur, and commercial repeater stations.
- To make available technical
people who may answer repeater related questions.
- This site deals mainly with various Motorola®, and GE® Mobile
modifications for duplex repeater operation.
- To provide availability to some conversion parts for Motorola®,
GE® and Hamtronics® equipment.
- To supply information on construction projects & technical information relating to
- To furnish links to modifications for Motorola®, GE®,
Hamtronics® and other manufacturers equipment.
- To make available email lists for those seeking information about repeaters.
Like this one.
- To provide links to Service and Equipment providers.
- Here is one example of the service provided by this site.
Ray's first repeater.
Main Modification & Information Index
Everything here was donated by somebody in
the spirit of sharing.
What information do you have to contribute?
(If you don't see the one you are looking for, see the "Other Manufacturers" listing at the end).
(Advanced Computer Controls) No longer in business; support is available
through other sources.
(Advanced Electronic Applications, Inc.) We have a number of AEA equipment
Aerotron and/or Aerotron-Repco
Now out of business.
Information on radios and other equipment by Alinco.
Information on Arcom Repeater Controllers and related products.
Information and modifications for Astron linear and switching power supplies.
Information on Bendix-King two-way radio equipment.
Information on CES two-way radio accessories.
Information on audible and sub-audible tone encoders and decoders.
Computer Automation Technology
Information on the CAT line of repeater controllers.
Inc. Information on CSI communications products.
Creative Control Products
Now out of business, here is almost all the information available on Creative
Control Products equipment.
Information on Daniels Electronics equipment.
E. F. Johnson
Information on E. F. Johnson two-way radio equipment.
General Electric /
The "Mastr" Index of conversion information and sites, plus various links to
other GE information (including over 1.8 GB of downloadable LBI manuals).
Now out of business, this page seems to be the last source of manuals and
information on their synthesizer products.
Information on Granger radio equipment.
Modifications and information on Hamtronics equipment.
Information and modifications for Icom two-way radio equipment.
Information and modifications for ICS repeater controllers.
Kendecom / ACS / MCS / Micro Control
Specialties Information and modifications.
Information on Kenwood two-way radio equipment.
Information on LDG Electronics voter products.
(Link-Comm) Information on the RLC series of repeater controllers.
Maggiore "Hi-Pro" Repeaters
Information on Maggiore "Hi-Pro" repeater products.
Information on MFJ equipment and accessories.
Micro Computer Concepts
Information on the RC-100 and RC-1000 repeater controllers.
Information on Midland two-way radio equipment.
Information on Dingbat products.
Information on Batwing products.
NHRC Repeater Controllers
Information and modifications for NHRC controllers.
Pacific Research Solutions
Information on Pacific Research Solutions repeater controllers and related
Pion and Simon Electronics
Information on Pion and Simon Electronics repeater controllers for the GE MASTR II.
Information on Radio Shack amateur transceivers and weather receivers.
Information on Ramsey radio and test equipment products.
Information on RCA two-way radio equipment.
Regency / RELM / Wilson
Information on Regency, Relm, and Wilson equipment.
Repeater Builder (the company)
Custom Repeaters and Products for the repeater builder or owner.
Information on Ritron two-way radio equipment.
Information on the 5K, 6K, 7K and other Scom repeater controllers and accessories.
Information on the Spectrum repeaters.
Information on Standard two-way radios and repeaters.
Information on Tait two-way radio equipment.
Information on Uniden and Bearcat two-way radios and scanners.
Information on VHF Engineering repeaters and modules.
West Mountain Radio
Products for DC Power, Amateur Radio, and R/C Hobbies.
Yaesu / Vertex and
Vertex / Standard
Information on Yaesu, Yaesu/Vertex, and Vertex/Standard equipment.
Information on Zetron controllers and tone panels.
Other Manufacturers' equipment
Information, Manuals and mods for equipment made by manufacturers not listed above.
If you can't find it anywhere else, check here!
Other Pages on Various Repeater Related
Antenna System Information The
antenna system is made up of everything that connects to the repeater transmitter and receiver
Backup and Alternative Power
Equipment modification and setup articles plus reference material.
Projects Repeater related construction projects.
downloads (software, powerpoint files, data files).
IRLP The Internet Radio Linking
Project is a worldwide community of radio/repeater systems. Here's an overview page with a lot of
Repeater Equipment Suppliers
Antennas, Controllers, Duplexers, Feedline, Repeaters, Voters, etc.
Repeater Jamming and how
to solve it / deal with it Information on catching
a repeater jammer.
Information on linking repeaters together.
Repeater-oriented articles, by Peter Policani,
K7PP These arrticles were published on his own site that has since left the
web. Peter gracioiusly gave Repeater-Builder permission to host certain relevant articles here.
related e-mail lists Links to several e-mail lists and reflectors
relating to repeaters.
Radio Mobile is a free and powerful
computer-aided tool witten by Roger Coudé VE2DBE. You can obtain a copy of RM from
It is used to plot antenna patterns and to predict the performance of radio systems from 20
MHz to 20 GHz. RM does, however, lack good, easy to understand documentation. The best place
for beginner info is the web site at
http://www.g3tvu.co.uk/Radio_Mobile.htm or at
(both are offsite links).
A Sample Set of Repeater Radio
Site Rules Here's a sample of what to expect when you rent space at a commercial
2-way radio site.
Here's another set from N9ZIA (offsite link).
customizable tower site lease agreement DOC file Here's a tower site
lease agreement you can download and fill in with your specific information when you are
looking to rent space at a commercial site. Lawyer-approved. Provided by Martin Flynn W2RWJ.
Amateur Radio Club Repeater Operation Rules Here are some samples
from various radio clubs: (all are offsite links except for the last one)
The Target System
WB1GOF Repeater Rules of Conduct
K5QHD Repeater Usage Rules and
Mount Diablo Amateur Radio Club Repeater Operation
The Great South Bay Amateur Radio Club of New York
Interstate Repeater Society of New Hampshire Repeater
Arlington Radio Public Service Club
Condor Connection Guidelines from
a open linked system that runs from Phoenix west to San Diego and north into Oregon
Private system policies and rules from
a now-defunct linked private system (this is here mostly as a set of ideas that others can borrow from).
Information Various technical articles & reference material.
A menu page with data sheets, manual PDFs, articles and pointers to test equipment,
including IFR / Aeroflex, HP / Agilent, Cushman, and others.
There are also a few articles on home-brew test equipment.
Two-Way Directory Page (offsite link) This web site, run by
Rik Rasmussen WA4BAN, is a directory of the Land Mobile (commercial 2-way radio)
industry. Over 1600 links plus a interesting commentary page (scroll down
to the "Two Way Radio Web Log").
Information on VoIP controllers and linking practices.
The R-B Mailing List / Reflector:
Miscellaneous stuff that
doesn't seem to fit anywhere else:
Hungry Spam Bots! Dinner_Served Here!
the Awards page. See the awards this site has received.
Legal and other important stuff......
GENERAL DISCLAIMER - - This site and its entire
contents is for informational purposes only!
If you chose to follow any link or procedure outlined herein, you do
so at your own risk.
Note that the repeater operational rules vary from country to country. What
is legal in one place will in many cases get you in trouble elsewhere. The
staff of this web site assume no responsibility for anything YOU do.
Our authors are not looking over your shoulder as you do surgery on a
radio - we and they cannot, nor will not, be responsible for any possible damage
to radio equipment, to yours or anothers personal property, to yourself or to
others caused by modifications that you or someone else may make to any
equipment as a result of your reading of the contents of any web page at this
web site, or any web site we link to.
The Repeater Builder's site does not evaluate the accuracy of materials created by persons beyond
its control or supervision. Therefore, although this site links to many additional web sites,
the Repeater Builder's site is not responsible for the availability of, completeness of, or the
accuracy of any materials contained within those web sites.
The terms Repeater Builder®, Repeater-Builder®,
Repeater Builders®, Repeater Builder Dot Com®, and
Repeater Builder's Technical Information Page®, are registered
trademarks of Repeater Builder and are registered in the United States under the
US Patent and Trademark Office (USPTO).
All trademarks, trademark names, service mark names, trademark images
and logos used on this web site are done so with an educational or informative
intent. All trademarked names belong to the owner and no violation or
infringement is intended.
Click here for information on
Click here for information
on the "fair use" doctrine & U.S. copyright law
This site and its contents are protected under US copyright laws. You
may reproduce the contents of this site (partial or full) for your own use,
but you may not reproduce it in quantity or sell the contents (partial
or full) for any profit without written consent of the originating author(s).
Links to this index page are allowed from other private web sites, but you
are not allowed to link to this site (or any pages contained within)
from public auction sites like eBay, or any other public web site without prior
arrangements from the site owner and the article author. Besides - links
to specific pages will break sooner or later as we move things around (and on top
of that we are exploring changing this web site into a wiki-like system). So
it's best to link to the index page and provide directions to get to a specific
This site and its contents are the intellectual property of Kevin Custer
and the contributing authors. The information contained within it
cannot be used for any form of personal gain by anyone outside of the
originating authors or those given permission to do so (in writing) by
Note: The appearance of any email addresses,
phone numbers or fax numbers on any web page that is a part of this web site
is intended solely for the convenience of persons wishing to contact us regarding
this Internet web site or the information contained here. Permission to use
such information for the purpose of email, fax or telephone solicitation by
others is absolutely and specifically denied.
web site, and the information presented in and on its pages is ©
Copyrighted 1995 - current by Kevin Custer WJ8G and multiple originating
Read this disclaimer!!
Information - Click Here
This page was initially created and copyrighted © 20
March 1995 by Brian L. Fritz and Kevin K. Custer