RepeatersWhat is a repeater?

Receiver, Transmitter, Controller, Duplexer, Power Supply and an Antenna

Types “makes and models.”

•Fundamentals.

•Controllers.

•Audio.

•Duplexers

•Coordination

•Brief description of IRLP, echo_link and other internet related linking systems

Overview of the Basics

Coordination

John Gebuhr WBØCMC2340 N 64th St.Omaha, NE 68104

Mid-America Coordination Council

Nebraska Frequency Coordinator

Requirements

Rpt call Output

Offset LAT/LON

Contact Sponsors

Access Auto-patch

Emergency power Direct access to 911

Gen coverage ARES/RACES/CD

RTTY Mailing address

HAAT ERP

Fundamentals

RX TX

CAT 300 DX

KØASH 145.310

Power Supply Antenna

SiteCoordination

TypesMakes and Models

444.300

147.045

ControllersAccepts incoming logic and applies and outgoing logic

Logic = Audio, VoltageCan be as simple as a switching transistor

The controllers of today come with timers, ider’s, and some formOf remote control via DTMF.

This is true of most home-brew controllers also.

You wont find many features in the aforementioned style controller

BUT the new controllers like

Cat 1000

Features Include: •Voice Synthesizer DTMF Regenerator •Forty Voice Messages •DTMF Pad Test •Digital Voice Clock •DTMF Audio Muting •Grandfather Clock •DTMF Paging •Two CW Identifiers •DTMF or Pulse Dialing •Programmable Courtesy Tones •DTMF Window •(64) Control Functions •DTMF Repeater Access •(60) Position Scheduler •DTMF Command Generator •Full Feature Auto patch •Link Serial Tuning

•(300) User Speed Dials •TS-440 HF Remote Base •(10) Emergency Speed Dials •FT-767GX HF Remote Base •Reverse Auto patch •RS-232 Interface •Last Number Redial •Hardware Inputs •Auto patch Cover Tone •DVR Controller Ready •Auto patch Time Extender •Programmable Prefix Codes •Macro Strings •TTL Computer Interface •Phone Number Read Back •Programmable Timers •Memory Saves •Two-Tone Paging •Caller ID Suppression •300 baud on Board Modem •User Function Switches •Link Auto Disconnect •Phone Number Lock-Out •Area Code Discrimination •Doug Hall RBI-1 Interface •Link Preset Frequencies

Features

Cat 300 DX

NHRC(New Hampshire Repeater Controller)

Voter

4 in Nebraska KØRPT(2), KØLNE, KBØTDY,

RVS-147.045

AudioPre-emphasized or emphasized Or discriminator VS speaker

Brick low and high pass filtering

Flat VS dynamic ranges

Delay

Forwarding the audio to the controller or voter

Hysteresis

Programmable variable switch

Selection Range db0 0% 2.50%1 2.50% 5%2 5% 7.50%3 7.50% 10%4 10% 12.50%5 12.50% 15%6 15% 17.50%7 17.50% 20%

Audio from the RX to comparator where converted into a numeric value then forwarded to Hysteresis module for switching then onto The controller and out to transmitter.

Duplexers

WP 641 WP 639

BpBr circuit

One side pass the high frequencyWhile notching the low

Other side passing the low Frequency while notching the low

Power Supply

Astron RM 50 M, RM 35 M, RM 20 M

Any power supply that will handle the load

Antennas

Hustler G6, G7, HX6-14448DB Products DB224EDiamond X510 and othersComet GP9 and others

Any antenna will work, look out for those that have multiple couplings, Brass fittings with Caesar screws. These need to be soldered over After tuning as they will produce snap, crackle, pop in the signal as well as add potential de-cense.

Internet GatewaysIRLP (Internet Repeater Linking Project)ECHOLINKILINKWIRES (Wide coverage repeater enhancement system)

KØKKV

Taking Measurements

Inventory

Bill Frost WØBX

Tower Company

Overlooking Lincoln

Waiting While Climbing

½ Way There

Still ½ Way There

Setting up Feed Line

Ready to Pull

Final Resting Spot

Heave Ho

Antenna up

Grip

KØKKV

KTØK Rain Dance