VHF coordination research project

A historical view of VHF Coordination

This research project is intended to show the birth of two-meter FM and the how/why the current day band plans for FM operation evolved.  It was intended to be published in December 2021, but the level of research required pushed it to today.  Two-meters has many strange coordination policies, from a baffling 600 kHz split, to different channel sizes across the band.  This paper seeks to explain how these policies came about backed up with verifiable references.

I found the evolution from the early 1930’s until fascinating and it was well worth the time spent researching for this project.  Anyone who has scratched their head looking at the two-meter band plans should find the answers they need in this.  As FASMA is the de-facto keeper of the Florida band plans, it’s imperative our members understand how these evolved.

927.6500 WJ4N Sunrise P25/FM

This is a new 900 MHz repeater in the sunrise area. It supports P25 and NBFM.
927.6500 WJ4N Sunrise Service Contour
927.6500 WJ4N Sunrise Service Contour
====FASMA COORDINATION RECORD 3637====

Record ID      : 3637
Coord Date     : 2022-03-30
Update Date    : 2022-03-30
Orig Cord Date : 2022-03-30
Holder         : Richard Conrad Clarke, W4RCC
Trustee        : Orlando Rojas, WJ4N
URL            : No URL On File
County         : Broward
City           : Sunrise
Lat, Lon       : 26.16, -80.32
Callsign       : WJ4N
Output Freq    : 927.6500 MHz
Input Freq     : 902.6500 MHz
Bandwidth      : 12.500 KHz
Emission 1     : 8K10F1E
Emission 2     : 11K2F3E
ERP            : 174.2 Watts, +52.41 dBm
Antenna Height : 133.33 Meters
DCS CODE       : 205
P25 NAC TX     : 0x293
P25 NAC RX     : 0x293
Model          : https://plots.fasma.org/902/927.6500_WJ4N_Sunrise_3637.kmz
Service        : 55 km
Interference   : 89 km

The coverage model is a standard KML format and may be viewed in google earth.
This is automatically generated based on your location, antenna height, ERP and
frequency.

Florida Amateur Spectrum Management Association, Inc.

444.6500 N4ADI Punta Gorda

This is a new DMR repeater in Punta Gorda. It’s on CC5 and also support NBFM with a 136.5 CTCSS tone.
444.6500 N4ADI Punta Gorda Service Contour
444.6500 N4ADI Punta Gorda Service Contour
====FASMA COORDINATION RECORD 3638====

Record ID      : 3638
Coord Date     : 2022-03-12
Update Date    : 2022-03-12
Orig Cord Date : 2022-03-12
Holder         : Joeseph Giardina Sr
Trustee        : Joeseph Giardina Sr, N4ADI
URL            : No URL On File
County         : Charlotte
City           : Punta Gorda
Lat, Lon       : 26.91, -82.07
Callsign       : N4ADI
Output Freq    : 444.6500 MHz
Input Freq     : 449.6500 MHz
Bandwidth      : 12.500 KHz
Emission 1     : 7K60FXE
Emission 2     : 11K2F3E
ERP            : 194.5 Watts, +52.89 dBm
Antenna Height : 23.00 Meters
Access Tone Out: 136.5 Hz
Access Tone In : 136.5 Hz
DMR CC         : CC1 = 5, CC2 = 5
Model          : https://plots.fasma.org/440/444.6500_N4ADI_Punta-Gorda_3638.kmz
Service        : 32 km
Interference   : 76 km
Features       : Open

The coverage model is a standard KML format and may be viewed in google earth.
This is automatically generated based on your location, antenna height, ERP and
frequency.

Florida Amateur Spectrum Management Association, Inc.

147.0300 K4HOG Sumterville 3595 Update

This repeater was moved to a higher tower and about 27 kM south.  The coordination was updated to reflect this.  Adjacent users are protected from new harmful interference. https://k4hog.org
147.0300_K4HOG_Sumterville_3595 Service Contour
147.0300_K4HOG_Sumterville_3595 Service Contour
147.0300_K4HOG_Sumterville_3595 adjacent
147.0300_K4HOG_Sumterville_3595 adjacent
147.0300_K4HOG_Sumterville_3595 co-channel
147.0300_K4HOG_Sumterville_3595 co-channel










====FASMA COORDINATION RECORD 3595====

Record ID      : 3595
Coord Date     : 2021-04-11
Update Date    : 2022-03-11
Orig Cord Date : 1997-09-09
Holder         : Hog County Amateur Radio Association, Inc
Trustee        : Gene E. King, KI4LEH
URL            : https://k4hog.org
County         : Sumter
City           : Sumterville
Lat, Lon       : 28.76, -82.06
Callsign       : K4HOG
Output Freq    : 147.0300 MHz
Input Freq     : 147.6300 MHz
Bandwidth      : 15.000 KHz
Emission 1     : 16K0F3E
Emission 2     :
ERP            : 130.0 Watts, +51.14 dBm
Antenna Height : 115.80 Meters
Access Tone Out: 123.0 Hz
Access Tone In : 123.0 Hz
Model          : https://plots.fasma.org/144/147.0300_K4HOG_Sumterville_3595.kmz
Service        : 53 km
Interference   : 101 km
Adjacent 1     : 48 km
Features       : AllStar: 49829
               : Echolink Node: 294541
               : Emergency Power
               : Weather
               : RACES/ARES
               : Wide Area

The coverage model is a standard KML format and may be viewed in google earth.
This is automatically generated based on your location, antenna height, ERP and
frequency.

145.2800 N4PGI Punta Gorda

This is a new Narrow Band FM repeater on a 10 kHz channel in Punta Gorda.  It’s running a 136.5 Hz CTCSS and shouldn’t cause any issue to the adjacent users.  
145.2800 N4PGI Punta Gorda 3636 Service Contour
145.2800 N4PGI Punta Gorda 3636 Service Contour
 
====FASMA COORDINATION RECORD 3636====

Record ID      : 3636
Coord Date     : 2022-03-11
Update Date    : 2022-03-11
Orig Cord Date : 2022-03-11
Holder         : Nora Giardina
Trustee        : Nora Giardina, N4PGI
URL            : No URL On File
County         : Charlotte
City           : Punta Gorda
Lat, Lon       : 26.91, -82.07
Callsign       : N4PGI
Output Freq    : 145.2800 MHz
Input Freq     : 144.6800 MHz
Bandwidth      : 10.000 KHz
Emission 1     : 11K2F3E
Emission 2     :
ERP            : 34.3 Watts, +45.35 dBm
Antenna Height : 15.00 Meters
Access Tone Out: 136.5 Hz
Access Tone In : 136.5 Hz
Model          : https://plots.fasma.org/144/145.2800_N4PGI_Punta-Gorda_3636.kmz
Service        : 17 km
Interference   : 50 km
Adjacent 1     : 39 km

The coverage model is a standard KML format and may be viewed in google earth.
This is automatically generated based on your location, antenna height, ERP and
frequency.

444.0000 N4ADI Punta Gorda

This is a new wideband FM and DStar repeater in Punta Gorda.  
444.0000 N4ADI Punta Gorda Service Conour
444.0000 N4ADI Punta Gorda Service Conour
 
====FASMA COORDINATION RECORD 3634====

Record ID : 3634
Coord Date : 2022-02-20
Update Date : 2022-02-20
Orig Cord Date : 2022-02-20
Holder : Joeseph Giardina Sr
Trustee : Joeseph Giardina Sr, N4ADI
URL : No URL On File
County : Charlotte
City : Punta Gorda
Lat, Lon : 26.91, -82.08
Callsign : N4ADI
Output Freq : 443.0000 MHz
Input Freq : 448.0000 MHz
Bandwidth : 12.500 KHz
Emission 1 : 7K60FXE
Emission 2 :
ERP : 230.1 Watts, +53.62 dBm
Antenna Height : 18.40 Meters
DMR CC : CC1 = 9, CC2 = 9
Model : https://plots.fasma.org/440/443.0000_N4ADI_Punta-Gorda_3634.kmz
Service : 31 km
Interference : 74 km
Features : Open

The coverage model is a standard KML format and may be viewed in google earth.
This is automatically generated based on your location, antenna height, ERP and
frequency.

443.0000 N4ADI Punta Gorda

This is a new DMR repeater in Punta Gorda.
443.0000 N4ADI Punta Gorda 3634 Service Contour
443.0000 N4ADI Punta Gorda Service Contour
 
====FASMA COORDINATION RECORD 3634====

Record ID : 3634
Coord Date : 2022-02-20
Update Date : 2022-02-20
Orig Cord Date : 2022-02-20
Holder : Joeseph Giardina Sr
Trustee : Joeseph Giardina Sr, N4ADI
URL : No URL On File
County : Charlotte
City : Punta Gorda
Lat, Lon : 26.91, -82.08
Callsign : N4ADI
Output Freq : 443.0000 MHz
Input Freq : 448.0000 MHz
Bandwidth : 12.500 KHz
Emission 1 : 7K60FXE
Emission 2 :
ERP : 230.1 Watts, +53.62 dBm
Antenna Height : 18.40 Meters
DMR CC : CC1 = 9, CC2 = 9
Model : https://plots.fasma.org/440/443.0000_N4ADI_Punta-Gorda_3634.kmz
Service : 31 km
Interference : 74 km
Features : Open

The coverage model is a standard KML format and may be viewed in google earth.
This is automatically generated based on your location, antenna height, ERP and
frequency.

FASMA presentation to GCARA

FASMA will be presenting to the Gold Coast Amateur Radio Association Tuesday February 22 at 8pm Local Time.  Everyone is encouraged to join via Zoom and the meeting invite is below.

Note the meeting starts at 7:30, but there will be a business meeting from 7:30-8:00

Join Zoom Meeting https://us02web.zoom.us/j/86417366104?pwd=YjBLaUFGK1NzRE9QUFRYZnh1ckwrQT09

Meeting ID: 864 1736 6104
Passcode: 719454


Dial by your location:

+1 929 205 6099 US (New York)
+1 301 715 8592 US (Washington D.C)
+1 312 626 6799 US (Chicago)
+1 669 900 6833 US (San Jose)
+1 253 215 8782 US (Tacoma)
+1 346 248 7799 US (Houston)

Updated Coordination Form

FASMA is happy to release an update the coordination form PDF. the new 1.12 PDF form has been through several revisions and has the required and optional information more clearly shown. In addition, drop-downs of list based items make this easier to use. The holder and trustee information is now side by side and easier to ensure it’s correct.

The coordination information page has been updated with this new form.

Feedback is encouraged; Please email rt@fasma.org with any thoughts you may have.
Fasma Form 1.12
Fasma Form 1.12

New 444.8375 KC4MHH in Gainesville #3631

This is a new DMR/NBFM repeater in Gainsville. It looks to have a great coverage area based on the model of 61 km.
444.8375_KC4MHH_Gainesville_3631 Service Contour
444.8375_KC4MHH_Gainesville_3631 Service Contour
====FASMA COORDINATION RECORD 3631====

Record ID      : 3631
Coord Date     : 2021-12-08
Update Date    : 2021-12-08
Orig Cord Date : 2021-12-08
Holder         : James A Carr
Trustee        : James A Carr, KC4MHH
URL            : http://kc4mhh.com
County         : Alachua
City           : Gainesville
Lat, Lon       : 29.71, -82.39
Callsign       : KC4MHH
Output Freq    : 444.8375 MHz
Input Freq     : 449.8375 MHz
Bandwidth      : 12.500 KHz
Emission 1     : 7K60FXE
Emission 2     : 11K2F3E
ERP            : 265.5 Watts, +54.24 dBm
Antenna Height : 167.00 Meters
Access Tone Out: 123.0 Hz
Access Tone In : 123.0 Hz
DMR CC         : CC1 = 1, CC2 = 1
Model          : https://plots.fasma.org/440/444.8375_KC4MHH_Gainesville_3631.kmz
Service        : 61 km
Interference   : 117 km
Features       : TG 3100, 3112, 3199, 31127 Static on Slot 1
               : BrandMeister Repeater ID:  312812

The coverage model is a standard KML format and may be viewed in google earth.
This is automatically generated based on your location, antenna height, ERP and
frequency.

Florida Amateur Spectrum Management Association, Inc.