Transcript Document

N1MNX.COM
David Peabody
7/17/2015
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Repeater Frequencies
PL tone on all but Digipeater are 100 Hz ENC/DEC
 70 Cm Freq. 442.900 MHz +5MHz
 2 Meter Freq. 147.345 MHz shift +600KHz
 6 Meter Freq. 53.890 MHz shift -1MHz
 2 Meter Digipeater 145.070 MHz Simplex
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Brief History 442.900
 Started with Ben KB1FJ purchasing a Hamtronics REP 200 I
offered to purchase it and keep it up, and so it was.
 It originally resided at Erik W1ZBT on a 100 ft tower.
 I previously received permission to put some test, non- Ham
radios/repeaters at the Heald St. site .
 I installed the first 8 sections of tower (80FT), then with help
increased to 128 Ft. Then moved the repeater to Heald St.
site. Into a building modified by Stu K1YET
 Ground elevation is 460 Ft. + 128Ft Tower
 Unit is 50 watts on an 8Db antenna and on standby power, 2-3
days with moderate use.
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2 Meter Digipeater 145.070 MHz
 Packet/mailbox on 145.090 using a Kantronics KPC3, and a General Electric Phoenix commercial radio
with 30 watts.
(over 20 years with nothing done to it).
 Now with the help of John KK1X and Jim N8VIM we
converted it to a digipeater. Hopefully to repeat
digital data, for APRS,WINLINK,or WX.
 System is a frequency agile Alinco DR 1200 running
25 watts with a 7Db antenna, and on standby power.
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6 Meter repeater
 Repeater radios were assembled mostly by Bob W1XP
 I bought the components, a Midland commercial radio,
which was eventually changed to a General Electric Exec.II
for TX.
 A controller Ralph KD1SM set up the controller
programming.
 A Receiver, which Bob W1XP modified for better selectivity
and sensitivity.
 The unit has 50 watts output .
 Antenna is two stacked 5/8 wave elements, designed and
built by Bob W1XP.
 I bought duplexers from a paging service, Bob W1XP tuned.
 Unit is on standby power, 2-3 days with moderate use.
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2 Meter Repeater
 It started with a lot of research because all repeater pairs
were taken.
 I looked at the coordinated repeaters and found a few were
distant. ( so I focused on them. )
 I went with a 50 watt radio to the site, and connected it to
the packet antenna which at the time was at the top side of
the tower.
 I tested the most likely repeater pairs and all PL
combinations 3 different days of 3 different weeks.= 9 times
 I found a pair and applied to the New England Spectrum
Management Council.
 I received authorization to test for interference. I found
no problem.
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2 Meter Repeater cont.
 I applied for full coordination and received it.
 I then bought a Kendercon Mark II repeater and
duplexers, again turned to Bob W1XP to tune the
system.
 It runs 50 watts into the duplexers and into a 7Db
collinear antenna.
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Radio system changes
 70 Cm & 2 M have been upgraded to 2 ea. Yaesu FT-8900
radios with a controller
in a modular fashion.
 If TX / RX or controller go bad, anyone can go up and
change the appropriate module and get it back on the air.
 Thanks to Larry W1ESR for getting the funding from the
regional Emergency Management group for these changes.
 Batteries are 2 independent banks of 3 each 12 volt deep
cycle.
 Charging system is on a timer to exercise the batteries
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The coordination process
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The coordination process for NESMC systems is a two step
process. The first step is the building phase - the 'six month'
test period.
Find or apply for a repeater pair to NESMC, New England
Spectrum Management Council.
Run tests to be sure you will not interfere with other
repeaters. (Test for at least six months.)
The second step is the 'final' three-year coordination.
Submit final application and wait for approval.
Upon Final approval complete installation.
Renew coordination every 3 years
Preferred method of application is on line.
Web Site http://www.nesmc.org/
Repeater search http://www.nesmc.org/rptr.html
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Some pictures
DC Power panel Built by Stan KD1LE
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147.345 MHz & 442.900MHz Repeaters
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Digipeater 145.070Mhz
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1 Bank of 12 Volt DC Batteries
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Antennas / Tower
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Ariel view by Jim N8VIM
Guy wire work Stan KD1LE,
Dave N1MNX
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Repeater directory listings
 ARRL Repeater pocket directory at ARRL site or Amateur
radio stores.
 NESMC http://www.nesmc.org/
 New England Repeater Directory
http://www.nerepeaters.com/
 K1IW Amateur Repeater and Broadcast Transmitters
Database http://rptr.amateur-radio.net/arn/rptr/
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Affiliations
NVARC / ARES / RACES / Emergency Management
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Thanks To:
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Local Emergency Management agency
Town of Pepperell Water Division (site)
NESMC Coordinators (frequency coordination)
Ham Credits go to: Ralph KD1SM,Bob W1XP,
Stan KD1LE, Dave N1MNX, Bernie N1IMO & Beltronics
Les N1SV, Stu K1YET and other supporters both financial,
equipment, & other donations.
Contact Information
David K. Peabody / N1MNX.com
4 Foster St. Apt 101, Pepperell, MA 01463
Telephone: (978) 433-2577
[email protected]
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N1MNX Repeaters Protocol for a special event
1. At
the start of the event: Identify
“This is [call sign] we will be using the N1MNX [Frequency] repeater for the next
[approx. time] hours for the [event name]. We appreciate the patience and
courtesy of the regular repeater users during this event, thank you.”
2. Periodically
during the event: Identify
At least once per hour, more if possible, NCS should repeat the identification.
“This is [call sign], Net Control for the [specify event name]. We thank the owner
and supporters of the N1MNX repeater for the use of the repeater for today’s
event. We will be using the repeater until [expected end time] and appreciate the
continued patience of the regular users.”
3. Upon
completion of event when terminating use: Close
“This is [call sign] securing the special net for the [event name] and returning the
N1MNX repeater to normal use. We thank the owner and supporters of the
repeater for the use of the repeater for today’s event and we thank the regular
users for their patience and courtesy during the event. This is [call sign] clear.”
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