THE K5RWK REPEATER
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THE THE K5RWK K5RWK REPEATER REPEATER HOW IT WORKS By F Cummings, W5LQU August 2009
description
THE K5RWK REPEATER. HOW IT WORKS By F Cummings, W5LQU August 2009. OUR REPEATER BLOCK DIAGRAM. THE PRESENT RWK REPEATER. BACK OF OUR REPEATER. THE REPEATER. INSIDE THE REPEATER. The repeater is programmed using a PC There are 8 possible channels we set up 4 Set RX and TX frequencies - PowerPoint PPT Presentation
Transcript of THE K5RWK REPEATER
THETHE K5RWK K5RWK
REPEATER REPEATER
HOW IT WORKS
By F Cummings, W5LQU
August 2009
OUR REPEATER BLOCK DIAGRAMOUR REPEATER BLOCK DIAGRAM
THE PRESENT RWK REPEATERTHE PRESENT RWK REPEATER
BACK OF OUR REPEATERBACK OF OUR REPEATER
THE REPEATERTHE REPEATER
INSIDE THE REPEATERINSIDE THE REPEATER
PROGRAMMING THE REPEATERPROGRAMMING THE REPEATER
The repeater is programmed using a PCThere are 8 possible channels we set up 4Set RX and TX frequenciesSet timers for hang time and time outSet TX power out and RX squelchSet CTCSS tones if needed for TX and RX
PROGRAMMIMG THE REPEATERPROGRAMMIMG THE REPEATER
THE CONTROLLERTHE CONTROLLER
THE CONTROLLER CIRCUIT BOARDTHE CONTROLLER CIRCUIT BOARD
PROGRAMMING THE CONTROLLERPROGRAMMING THE CONTROLLER
The controller is programmed using DTMF tones through the RX
Set various control operator functionsSet the normal voice ID and CW IDSet timers for hang time and time outSet the time out messageSet the courtesy tones
TROUBLE SHOOTINGTROUBLE SHOOTING
2M DB2242M DB224ANTENNAANTENNA
A DB224 antenna with4 vertically stacked folded dipoles whichcan be connected to form an omni or eliptical pattern withabout 6 to 8 dB gain
OUR PRESENT ANTENNAOUR PRESENT ANTENNA
OUR NEW LOCATIONOUR NEW LOCATION
VIEW FROM THE NEW SITEVIEW FROM THE NEW SITE
LIGHTNING PROTECTION LIGHTNING PROTECTION and 2m / 440 DUPLEXERand 2m / 440 DUPLEXER
THE THE BIGBIG PROBLEM PROBLEM
Connecting the TX / RX to the same antenna at the same time
2m / 440 dual band radiosCollinear verticalsDelta of 147.72/147.12 = 0.4 %Need a very special Duplexer for 2m
repeatersCombination bandpass/bandreject circuitRequires very high Q circuits
RWK DUPLEXERRWK DUPLEXER
BP/BR vs LP/HP6 quarter wave cavities – 3 TX and 3 RX1 BP and two BP/notch cavities eachRX bandpass 147.72 and notch 147.12
MHzTX bandpass 147.12 and notch 147.72
MHzAbout 95 dB isolation from BP to notch
each
DUPLEXER RESPONSE CURVESDUPLEXER RESPONSE CURVES
Tx
AD5VO TUNING THE DUPLEXERAD5VO TUNING THE DUPLEXER
RWK 6 CAVITY DUPLEXERRWK 6 CAVITY DUPLEXER
THE K5RWK REPEATERTHE K5RWK REPEATER
