N2HJD REPEATER MEGAPLEX, SPECIFICATIONS
Bob Shewell, N2HJD/R Trustee & Builder
"The Megaplex" is a home brew repeater system made from modified commercial equipment and from scratch
Controllers: 1qty RC850, 17qty home brew, 1qty home brew DVR / RC850 backup, 1qty I/O expander & battery backup
Features: Remote base & receivers, links, translator, DVR, telemetry, emergency power, weather radio, paging, and autopatch
The repeaters making up "The Megaplex", Note: Most repeaters operate open carrier but all are PL decode capable
10 meters: Output= 29.680, Input= 29.580, Note: split site repeater
Location= Brighton, Power= 100W, ERP= 100w, ASML= 650ft, PL= 123hz
Equipment used: Receiver= GE, Transmitter= Motorola, Links= Harris, Control= Harris, Controller= N2HJD
6 meters: Output= 53.330, Input= 52.330, Note: split site repeater
Location= Henrietta, Power= 125W, ERP= 250W, ASML= 725ft, PL= 123hz
Equipment used: Receiver & Transmitter= Motorola, Links= Midland, Control= Harris, Controller= N2HJD
2 meters: 1st: Out= 146.925, In= 146.325, Translator= 147.525, 2nd: Out= 145.410, In= 144.810,
3rd: Out= 147.390, In= 147.990
1st, 146.925: Location= Mendon, Power= 75W ERP= 600W, ASML= 710ft, PL= 110.9hz
Equipment used: Receiver & Transmitter= Harris, Link= Midland, Control= Harris, Controller= N2HJD
Translator= Receiver, 147.525 & Transmitter, 447.800= Harris, Control= Harris, Controller= N2HJD
2nd, 145.410: Location= Farmington, Power= 35W, ERP= 250W, ASML=820ft, PL= 110.9hz
Equipment used: Receiver= Hamtronics, Transmitter= GE, Link= Harris, Control= Harris, Controller= N2HJD
3rd, 147.390: Location= Brockport, Power= 35W, ERP= 250W, ASML=770ft, PL= 110.9hz
Equipment used: Repeater= Icom IC-RP1520, Link= Harris, Control= Harris, Controller= N2HJD/Icom
1 1/4 meters: Output= 224.580, Input= 222.980
Location= Rochester, Power= 20W, ERP= 150W, ASML= 420ft, PL= 110.9hz, Note: Hub
Equipment used: Receiver & Transmitter= Yaesu, Control= Phone, Controller= RC850 & N2HJD
70 centimeters: 1st: Out= 442.800, In= 447.800, 2nd: Out= 442.900, In= 447.900, 3rd: Out= 444.700, In= 449.700
1st, 442.800: Location= Rochester, Power= 100W, ERP= 1000W, ASML= 450ft, PL= 110.9hz, Note: Hub
Equipment used: Receiver & Exciter= Spectrum, PA= Motorola, Control= Phone, Controller= RC850 & N2HJD
2nd, 442.900: Location= Honeoye, Power=25W, ERP=150W ASML= 1240ft, PL= 110.9hz
Equipment used: Receiver & Transmitter= Harris, Link= Harris, Control= Harris, Controller= N2HJD
3rd, 444.700: Location= Mendon, Power= 50W, ERP= 400W, ASML= 710ft, PL= 110.9hz
Equipment used: Receiver & Transmitter= Harris, Link= Midland, Control= Harris, Controller= N2HJD
23 centimeters: Output= 1288.00, Input= 1268.00, Note: vertical seperation
Location= Rochester, Power= 1W, ERP= 10W, ASML= 385ft, PL= 110.9hz
Equipment used: Receiver= Motorola & Harris, Transmitter= Icom, Link= Harris, Controller= N2HJD
CONTROLLER
Bob Shewell, N2HJD/R Trustee & Builder
"The N2HJD Repeater Controller" is a firmware programmed controller capable of either controlling two repeaters with a transparent link or a split site transmitter
N2HJD Controllers:
Version 1, Features:
REPEATER / REMOTE RECEIVER WITH PL & TT CONTROL
2ND REPEATER / CONTROL RECEIVER WITH PL & TT
PTT-2 CAN BE USED TO CONTROL SQUELCH DISABLE
LINK CAN BE DISABLED DURING AN AUTOPATCH
LINK / RBASE TRANSCEIVER, SIMPLEX LINK
LINK RECEIVER CAN BE FOR CONTROL
CAPABLE OF BEING 2 REMOTE RECEIVERS
CRYSTAL TIME BASE = 3.58 Mc
4.19 uSEC INSTRUCTION CYCLE TIME
THREE DTMF CONTROLLED OUTPUTS
OUTPUT 3 CONFIGURABLE AS REPT-2 PL OUT
60 DTMF CONTROL OPERATOR COMMANDS
DTMF TONE "D" OR "C" FORCES COMMAND
CONTROL OP COMMAND PREFIX = X,X,X
THREE USER DTMF COMMANDS
USER TOUCH TONE DOWN = X,X,X,0
USER TOUCH TONE UP = X,X,X,1
USER FORCED ID = X,X,X,2
Version 2, Features:
REPEATER LOCAL RECEIVER WITH PL & TT CONTROL
PL OR TT MODE ON REPT REC CONTROLS LINK
LINK CAN BE DISABLED DURING AN AUTOPATCH
REPEATER COR CONTROLS A TIMED MESSAGE
LINK RECEIVER CONTROLS REPEATER XMIT
LINK AUDIO GATE CONNECTS XMIT AUDIO
PART OR FULL TIME CONTROL BY LINK
OVER TEMPERATURE ALARM STOPS XMIT
TIMED FAN OPERATION WITH XMIT
CRYSTAL TIME BASE = 3.58 Mc
4.19 uSEC INSTRUCTION CYCLE TIME
THREE DTMF CONTROLLED OUTPUTS
60 DTMF CONTROL OPERATOR COMMANDS
DTMF TONE "D" FORCES COMMAND
CONTROL OP COMAND PREFIX = X,X,X
FIVE USER DTMF COMMANDS
USER TOUCH TONE DOWN = X,X,X,0
USER TOUCH TONE UP = X,X,X,1
USER RESET / ID = X,X,X,2
USER LINK TIMER EXTEND = X,X,X,*
USER LINK TIMER OFF = X,X,X,#
DIGITAL VOICE RECORDER
Bob Shewell, N2HJD/R Trustee & Builder
"The N2HJD DVR" is a digital voice recorder capable of interfacing with ACC repeater controllers along with being a stand alone or backup repeater controller with voice ID
N2HJD DIGITAL VOICE RECORDER / REPEATER CONTROLLER
EMULATES ACC DVR OR IS A REPEATER CONTROLLER WITH LINK
SERIAL PORT INPUT OR DTMF DECODER TO "PLAY TRACK"
SERIAL PROTOCOL IS ACC RC-850 / RC-85 COMPATABLE
64 DTMF COMMANDS & 16 SERIAL COMMANDS
12 FIXED TRACKS, 5 X 2sec, 4 X 5sec, 3 X 10sec
4 VARIABLE TRACK TIMES FOR TRACK "0": 10, 20, 30, OR 60sec
ONE USER ACCESSIBLE RECORD "1"/ PLAYBACK "0" TRACK, 10sec
DEFAULT COMMANDS, COOP = XXXY, DVR = XXXY, USER = XXXY
DEFAULT COOP & DVR PREFIXES ARE COOP PROGRAMMABLE
USER: "0"=TT DOWN, "1"=TT UP, "2"=ID, "3"=INFO MSG
880Hz COURTESY TONE & KERCHUNK FILTER IN REPEATER MODE
ua8748 PROCESSOR, 3.57945Mc CRYSTAL, 4.19uS INSTRUCTION TIME