W6 cyx kd6ire
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March 14th, 2006 1 W6YX 1.2Ghz Repeater Project Presented by Bob Warmke W6CYX to Stanford Amateur Radio Club
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March 14th, 2006 1
W6YX 1.2Ghz Repeater Project
Presented by Bob WarmkeW6CYX
to
Stanford Amateur Radio Club
March 14th, 2006 2
Stanford Repeater Site
March 14th, 2006 3
Old Repeater
March 14th, 2006 4
Old Repeater
March 14th, 2006 5
New RepeaterNew ICOM 1220 repeater (modified)New Comet GP21 21 element colinearantenna and mastNew LMR400 Feed lineNew Linkcom RLC-1 Plus controllerNew Kenwood TM-541A link transceiver and associated feed line and antennaNew IRLP & Echolink connectivityNew Connectivity to W6RLW Network
March 14th, 2006 6
Stanford
March 14th, 2006 7
Repeater Site
Stanford1282.500
1282.000
March 14th, 2006 8
Typical W6RLW Repeater
March 14th, 2006 9
Standard Duplexer
March 14th, 2006 10
Duplexer Pass / Reject
March 14th, 2006 11
Advantages of 1.2 GHZLow NoiseReduced intermod249 pairs available – less than 100 in use in Northern CaliforniaSmall size Repeater equipmentSmall antennas More high tech users
March 14th, 2006 12
Disadvantages of 1.2 GHZ
Equipment expensive and scarce Feed line and connector lossesFrequency stability and accuracy Propagation Radar Interference
March 14th, 2006 13
Propogation Observations
Higher loss through foliage Multipath and Reflections are more obviousTerrestrial distance record greater on 1.2Ghz than on 440MhzKnife edging (Refraction) or Reflection?
March 14th, 2006 14
Refraction or Reflection ?
March 14th, 2006 15
Repeater System Architecture
Receiver
Transmit
Link Radio
Receiver
Transmit
Repeater ARepeater B
March 14th, 2006 16
Repeater System Architecture
Receiver
Transmit
Link Radio
Receiver
Transmit
Repeater A Repeater B
March 14th, 2006 17
Repeater System Architecture
Receiver
Transmit
Link Radio
Receiver
Transmit
Repeater A Repeater B
March 14th, 2006 18
Repeater Site
Stanford1282.500
1282.000
Questions
March 14th, 2006 20
Internet Radio Linking Project
Presented by Don FergusonKD6IRE
toStanford Amateur Radio Club
March 14th, 2006 21
What’s IRLP about ?
Use the Internet to link amateur repeaters.Allow links to be controlled by Repeater usersProvide REFLECTORS to link multiple repeatersMake it affordable and dependable.?Keep it secure from unauthorized use.?? *
March 14th, 2006 22
Hardware•• The Custom Red Hat CDThe Custom Red Hat CD--ROMROM
•• Red Hat Boot Floppy DisketteRed Hat Boot Floppy Diskette
• Custom PCB by VE2LTDCustom PCB by VE2LTD
•• PCB Does COR, PTT & DTMFPCB Does COR, PTT & DTMF
•• DB9 IRLP to Repeater Interface DB9 IRLP to Repeater Interface
•• LPT1 to IRLP Jumper CableLPT1 to IRLP Jumper Cable
March 14th, 2006 23
Node 7670
The W6CYX IRLP Node 7670The W6CYX IRLP Node 7670
March 14th, 2006 24
Link Antenna
The W6CYX IRLP Node 767The W6CYX IRLP Node 767
March 14th, 2006 25
Node 7670 Setup
ADSLMODEM
Router
IRLP ComputerCustom Fedora Core 3
O/S
1.5Mb+ Internet connection
To another IRLP Node
10Mb Ethernet Connection
10/100Mb Ethernet Connection
Repeater ControllerLink Port
Repeater orRemote Base
PTT COR Audio
RF Link
Link Xcvr
PTT COR Audio
RF Link gating
on COS
Kenwood TM-541a
1282.200mhzLoma Prieta
145 mhz440 mhz1.2 ghz
SMC 7004wabr
March 14th, 2006 26
Point to Point IRLP
RPTRRPTR
RPTRRPTR
IRLPIRLPServerServer
IRLPIRLP
IRLPIRLP
145 mhz
1.2 ghz
March 14th, 2006 27
What does it sound like?
The underlying VoIP software is a program called Speak Freely it is digital and sounds GREAT!
In fact, unless you knew you where connected to a data link, you would never know!
Everyone sounds like locals!!
March 14th, 2006 28
What a QSO Sound Like?Direct - Point to Point Mode
This is an actual connection and QSO to the Bundaberg Australia.
It sounds like just another user of the repeater .
March 14th, 2006 29
For More InformationFor more information on NODE 7670 contact:[email protected] or [email protected]
For General Information about IRLP, on the WWW see: http://www.irlp.net
For Node Activity and connection Status, see:http://status.irlp.net/static.html
For Node Information Web Pages, on the WWW see:http://www.irlp.net/03-background/body.html
March 14th, 2006 30
Even more excitingfor Hams
who own a computer
March 14th, 2006 31
EchoLink
http://www.echolink.org/
March 14th, 2006 32
Echolink Home page
March 14th, 2006 34
Bill Talking
March 14th, 2006 35
Emil Talking
March 14th, 2006 36
Don Talking
March 14th, 2006 37
W6RLW-REchoIRLP
http://www.echolink.org/
