The following is the suggested frequency utilization plan for the 420 – 450 MHz Amateur Radio bands. This plan is from the Southeastern Repeater Association. You may view their website at
www.sera.org (www.sera.org.)Overview of the SERA frequency allocations, please scroll down to view specifics.
420.0000 - 420.2000 Repeater Links
420.0000 - 426.0000 ATV Repeater Output
421.250 Video -425.750 Audio
426.0000 - 432.0000 ATV Simplex
427.250 Video - 431.750 Audio
432.0000 - 433.0000 SSB & Weak Signal
432.100 National SSB Calling Frequency
433.0125 - 433.2000 Repeater Links
433.0000 - 439.0000 ATV Simplex Only
434.000 Video - 438.500 Audio
438.7750 - 439.5875 Repeater Links
439.6000 - 440.4750 FM Digital/Packet Operation
440.5125 - 440.7250 Narrow Band Digital Repeater Outputs/Duplex Backbones/Link
440.7375 - 440.9000 Simplex Cross Band Voice - Base
440.9125 - 441.1750 Simplex Digital
441.000 National Digital Calling Frequency
441.1875 - 441.4875 Links, Control Frequencies
441.5000 Simplex Digital
441.5250 - 441.7750 Duplex Link Repeaters
441.8000 - 444.9750 FM Standard Repeater Outputs
445.0250 - 445.4750 Digital
445.5125 - 445.7250 Digital Repeater Inputs
445.7375 - 445.9000 Simplex Cross Band Voice - Mobile
445.9125 - 446.1750 FM Simplex
446.000 National FM Calling Frequency
446.1875 - 446.4875 Links, Control Frequencies
446.5000 Simplex Digital
446.5250 - 446.7750 Duplex Link Repeaters
446.8000 - 449.9750 FM Standard Repeater Inputs
Voice FM Simplex Frequencies
22 Simplex FM Voice Channels
445.9125 445.9250
445.9375 445.9500 445.9625
445.9750 445.9875 446.0000 *
446.0125 446.0250 446.0375
446.0500 446.0625 446.0750
446.0875 446.1000
446.1125 446.1250 446.1375
446.1500 446.1625 446.1750
*
446.000 is the National FM Voice Simplex Calling Frequency
Narrow Band FM Digital Repeater/Digital Duplex Backbone
18 Duplex Channels, 12.5 KHz split, 5 MHz split,
High/input - Low/output
Wide Band Digital Duplex Backbones/Links
19 Duplex Channels, Mixed 50/100 KHz, 5 MHz split,
High/input - Low/output, polarization optional - horizontal or vertical
445.0250 - 440.0250 445.0500 -
440.0500 445.0750 - 440.0750 445.1000 -
440.1000
445.1250 - 440.1250 445.1500 - 440.1500
445.1750 - 440.1750 445.2000 - 440.2000
445.2250 - 440.2250 445.2500 - 440.2500
445.2750 - 440.2750 445.3000 - 440.3000
445.3250 - 440.3250 445.3500 - 440.3500
445.3750 - 440.3750 445.4000 - 440.4000
445.4250 - 440.4250 445.4500 - 440.4500
445.4750 - 440.4750
Narrow Band FM Digital/Packet Simplex
440.9125 440.9250
440.9375 440.9500 440.9625
440.9750 440.9875 441.0000 *
441.0125 441.0250 441.0375
441.0500 441.0625 441.0750
441.0875 441.1000
441.1125 441.1250 441.1375
441.1500 441.1625 441.1750
* 441.000 is the National Digital Simplex
Calling Frequency
Standard FM Repeaters
128 Repeater Pairs, 25 KHz spacing, 5 MHz split,
High/input, Low/output
446.800 - 441.800 446.825 -
441.825 446.850 -
441.850 446.875 - 441.875
446.900 - 441.900 446.925 -
441.925 446.950 -
441.950 446.975 - 441.975
447.000 - 442.000 447.025 -
442.025 447.050 -
442.050 447.075 - 442.075
447.100 - 442.100 447.125 -
442.125 447.150 -
442.150 447.175 - 442.175
447.200 - 442.200 447.225 -
442.225 447.250 -
442.250 447.275 - 442.275
447.300 - 442.300 447.325 -
442.325 447.350 -
442.350 447.375 - 442.375
447.400 - 442.400 447.425 -
442.425 447.450 -
442.450 447.475 - 442.475
447.500 - 442.500 447.525 -
442.525 447.550 -
442.550 447.575 - 442.575
447.600 - 442.600 447.625 -
442.625 447.650 -
442.650 447.675 - 442.675
447.700 - 442.700 447.725 -
442.725 447.750 -
442.750 447.775 - 442.775
447.800 - 442.800 447.825 -
442.825 447.850 -
442.850 447.875 - 442.875
447.900 - 442.900 447.925 -
442.925 447.950 -
442.950 447.975 - 442.975
448.000 - 443.000 448.025 -
443.025 448.050 -
443.050 448.075 - 443.075
448.100 - 443.100 448.125 -
443.125 448.150 -
443.150 448.175 - 443.175
448.200 - 443.200 448.225 -
443.225 448.250 -
443.250 448.275 - 443.275
448.300 - 443.300 448.325 -
443.325 448.350 -
443.350 448.375 - 443.375
448.400 - 443.400 448.425 -
443.425 448.450 -
443.450 448.475 - 448.475
448.500 - 443.500 448.525 -
443.525 448.550 -
443.550 448.575 - 443.575
448.600 - 443.600 448.625 -
443.625 448.650 -
443.650 448.675 - 443.675
448.700 - 443.700 448.725 -
443.725 448.750 -
433.750 448.775 - 443.775
448.800 - 443.800 448.825 -
443.825 448.850 -
443.850 448.875 - 443.875
448.900 - 443.900 448.925 -
443.925 448.950 -
443.950 448.975 - 443.975
449.000 - 444.000 449.025 -
444.025 449.050 -
444.050 449.075 - 444.075
449.100 - 444.100 449.125 -
444.125 449.150 -
444.150 449.175 - 444.175
449.200 - 444.200 449.225 -
444.225 449.250 -
444.250 449.275 - 444.275
449.300 - 444.300 449.325 -
444.325 449.350 -
444.350 449.375 - 444.375
449.400 - 444.400 449.425 -
444.425 449.450 -
444.450 449.475 - 444.475
449.500 - 444.500 449.525 -
444.525 449.550 -
444.550 449.575 - 444.575
449.600 - 444.600 449.625 -
444.625 449.650 -
444.650 449.675 - 444.675
449.700 - 444.700 449.725 -
444.725 449.750 -
444.750 449.775 - 444.775
449.800 - 444.800 449.825 -
444.825 449.850 -
444.850 449.875 - 444.875
449.900 - 444.900 449.925 -
444.925 449.950 -
444.950 449.975 - 444.975
FM Itinerant Voice Repeaters
2 Repeater Pairs, 25 KHz spacing between channels, 5 MHz
split, High/input, Low/output
445.750 -
440.750 445.800 - 440.800
Reserved for itinerant and short term use during a
special event or emergency with no formal coordination required.
Trustees/Owners are encouraged to notify their local coordinator to inform them
of system parameters and expected duration of use.
FM Cross Band Repeat Simplex (NBFM)
Channels for Fixed Stations ONLY, 12 Simplex Channels, for
Fixed Cross Band Repeat
440.7375 440.7625
440.7750 440.7875 440.8125
440.8250
440.8375 440.8500 440.8625
440.8750 440.8875 440.9000
Channels for Mobile Stations ONLY, 12 Simplex Channels,
for Mobile Cross Band Repeat
445.7375 445.7625
445.7750 445.7875 445.8125
445.8250
445.8375 445.8500 445.8625
445.8750 445.8875 445.9000
Link & Control Channels (Narrow Band FM)
May be paired on "440", or individually paired
with 222 MHz band fixed link frequencies. May be individually coordinated. Some
may be coordinated as simplex remote base or remote control systems.
446.1875 -
441.1875 446.2000 -
441.2000 446.2125 -
441.2125 446.2250 - 441.2250
446.2375 - 441.2375 446.2500 -
441.2500 446.2625 -
441.2625 446.2750 -
441.2750
446.2875 - 441.2875 446.3000 -
441.3000 446.3125 -
441.3125 446.3250 - 441.3250
446.3375 - 441.3375 446.3500 -
441.3500 446.3625 -
441.3625 446.3750 - 441.3750
446.3875 - 441.3875 446.4000 -
441.4000 446.4125 -
441.4125 446.4250 - 441.4250
446.4375 - 441.4375 446.4500 -
441.4500 446.4625 -
441.4625 446.4750 - 441.4750
446.4875 - 441.4875
Duplex "Hub" Linking Repeaters
11 Repeater Pairs, 25 KHz spacing, 5 MHz split,
High/input, Low/output, maximum 100w ERP.
446.525 - 441.525 446.550 -
441.550 446.575 - 441.575 446.600 -
441.600 446.625 - 441.625
446.650 - 441.650 446.675 - 441.675 446.700
- 441.700 446.725 - 441.725 446.750 -
441.750
446.775 - 441.775
These repeater pairs are reserved for use as a wide
area linking "hub" repeater that tie a group of standard FM voice
repeaters together. The SERA strongly recommends this method of linking rather
that using in band, or remote base, type linking.
Link Channels (Narrow Band FM)