Suggested LA And San Diego FM Repeaters -- With Map, For Use when Traveling in Southern Cal or Escaping From It -- By Dave AD7DB

Southern California Repeater List -- Via TASMA
Southern California Repeater List -- California, San Fernando Valley -- By Dave AD7DB
San Diego Area Long Range Inter-Tie Systems (WIN, CALZONA, CONDOR, MORE)
San Diego IRLP Nodes
San Diego Packet Radio Nodes, BBS's and DX Packet Cluster Network
220MHz Repeaters - Southern California Repeater List -- Via 220SMA
Pacific Crest Trail Repeater Guide -- Via Bill Jeffrey, AA6J
Six Meters - Southern California List -- Via N6CRO Page - Courtesy of Paul, KB6MIP

REPEATER TECHNICAL INFORMATION & GUIDELINES

1. Repeaters Owners Mail Reflector Repeater-subscribe@Onelist.com -- No TEXT or subject needed

2. Repeater Mail Reflector repeater-request@jerrys.rogerswave.ca (no subject) subscribe

Repeater Band Plans -- From SHARKK
Repeater Band Plans -- From SERA
Repeater Useage GuideLines -- From The ARRL
SHARKK Technical Page -- Loaded
Repeater info, mods, and tips  -- From The South East Iowa Technical Society
Repeater Technical Info -- From SHARKK
The Repeater Builder's Technical Information Page
Theory and Testing Of Duplexers - From Repeater-Builders.com
Amateur Repeater Builders Home Page -- From N6NMZ
Lots Of Repeater Building & Articles -- From The ARRL
TuneUp And Maintenance -- Via The South East Iowa Technical Society
JBRC Repeater Controller - From James Babcock

Guide To Transmitter Range Via Artsci
Line of Sight (LOS) Radio Links
Line Of Sight To The Horizon, Formula & Calculator.
Calculating the Distance To The Horizon
Radio Mobile -- Predict the performance of a radio system -- From VE2DBE

ICOM PL Tone Page
Motorola CTCSS Codes
Motorola -- All About flashcodes, encryption etc.

If you want to know more how repeaters work technically, duplexers, controllers, etc -- see URL: 
Antomy Of A Repeater

Also see: A Typical Repeater Controller.

Another FM Tutorial

Cross Band Repeating -- From N5TIM

Cross Band Repeating -- From WB3GCK

Also See Mods.dk for your radio brand 

OFFSETS AND TONES

The standard offsets for HF/VHF/UHF/SHF are:

29 MHz     100 kHz   (-)	147 MHz   600 kHz    (+)	1.2 GHz   12 MHz   (-)
50 MHz     500 kHz   (-)	222 MHz   1.6 MHz    (-)	2.4 GHz  20 MHz    (-)
145 MHz   600 kHz   (-)	440 MHz   5.0 MHz    (-) **
146 MHz   600 kHz   (+ or -)	900 MHz   25.0 MHz  (-)

** Plus Offset In Some areas - notably Northern California.

When a repeater receives below the transmit frequency it is termed a minus offset. A repeater that transmits on 147.13 MHz and receives on 147.73 has a plus offset. Repeater input frequencies are given as either + or - signs to indicate whether the user's transmit frequency is above or below the repeater transmit frequency. Repeaters that have outputs in the lower part of the 146 MHz portion are often plus offsets while those operating in the upper portion of 146 MHz are minus offsets. See your repeater guides. Most of the new rigs default to the accepted offsets.

  INTERNET LINKED REPEATERS, ILINK, ECHOLINK, WIRES II

There are now nearly 759+ repeaters around the world connected by the internet through the internet radio linking project (IRLP) 24 hours per day 7 days a week.  The most remote repeater on the system is on Antarctica. To call a repeater on the system you just dial a 4 digit DTMF code.

About IRLP - From eHam.net

Official Home of The Internet Radio Linking Project

IRLP Node Codes and Locations - 759+ of em

IRLP Nodes Map - North America

IRLP Operating Guidelines -- From The Kitchener-Waterloo ARC

Typical IRLP Guidelines -- Via the KD4RAA Repeater Group

Live Audio from IRLP -- Hear It Here

NEW 440 MHz PALOMAR MTN SITE WITH IRLP -- San Diego

ECHOLINK -- Introduction

ECHOLINK -- Another New Innovation

ILINK - Introduction

I-LINK***ECHOLINK Boards -- From WB2REM & G4CDY

ILINK -- Newest Rage

ILink Software information

WIRES II^TM -- (Wide-Coverage Internet Repeater Enhancement System) Another VoIP (Voice Over IP) Innovation Via Yaseu

All About Wires II^TM By Jim Baudo,  N0UQZ