repeaters what is a repeater? receiver, transmitter, controller, duplexer, power supply and an...
TRANSCRIPT
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