2m/70cm Ham And CB Frequencies

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This post was originally published on May 22, 2023
The latest update to this post was made 10 months ago.

Radio Tower Radio Frequencies
2m/70cm Ham And CB Frequencies

Ham radio and Citizens Band (CB) radio are two popular communication methods used by amateur radio enthusiasts. Both of these radios operate on specific frequencies, with 2m and 70cm being the most commonly used ham frequencies, while CB radios operate on a set frequency range of 26.965 to 27.405 MHz. The use of ham and CB radios has become increasingly common over the years, especially during emergencies or for communication in remote areas where traditional phone lines may not be available. Understanding the differences between these frequencies and how they are utilized is important for anyone interested in amateur radio communication.

Commonly Used Abbreviations

  • SSB = Single Side Band | LSB = Lower Side Band | USB = Upper Side Band
  • EME = Earth -> Moon -> Earth or Moon Bounce | CW = Morse Code
  • OSCAR = Orbiting Satellites Carrying Amateur Radio
  • Simplex = Person to person communication (no repeater involved)
  • FM = Frequency Modulation | AM = Amplitude Modulation
  • ATV = Amateur Television (fast scan tv)

2m Frequencies Table (144.000MHz – 148.000MHz)

The 2m band is one of the most popular ham radio bands, spanning from 144.000MHz to 148.000MHz. It is a VHF frequency range that has been allocated to amateur radio operators and provides an excellent platform for local communication. The band is ideal for mobile operation, and its efficient antennas can be easily mounted on vehicles or high locations.

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One of the more significant advantages of the 2m band is its ability to provide reliable local communications. Operators can use their handheld or mobile radios to communicate with other hams in their area often without experiencing interference from distant stations. Additionally, repeaters are available on this frequency range that allows long-distance contacts by relaying signals over large distances.

144.000 – 144.050 EME (Earth Moon Earth or “Moonbounce”) CW
144.050 – 144.100 CW / Weak signal
144.100 – 144.200 EME (Earth Moon Earth or “Moonbounce”) Weak SSB
144.200 National calling frequency (SSB)
144.200 – 144.275 General SSB operations
144.275 – 144.300 Propagation beacons
144.300 – 144.500 OSCAR Subband (New)
(Orbiting Satellites Carrying Amateur Radio)
144.500 – 144.600 Linear translator inputs
144.600 – 144.900 FM repeater inputs (repeater IN)
144.900 – 145.100 Weak signal transmissions & FM simplex
(145.010, 145.030, 145.050, 145.070, 145.090 packet)
145.100 – 145.200 Linear translator outputs
145.200 – 145.500 FM repeater outputs (repeater OUT)
145.500 – 145.800 Misc & experimental modes
145.800 – 146.000 OSCAR Subband (Original)
(Orbiting Satellites Carrying Amateur Radio)
146.010 – 146.370 Repeater inputs (repeater IN)
146.400 – 146.580 Simplex communications
(146.400MHz is repeater input in some areas)
146.520 National simplex calling frequency
146.610 – 146.970 Repeater outputs (repeater OUT)
147.000 – 147.390 Repeater outputs (repeater OUT)
147.420 – 147.570 Simplex
147.600 – 147.990 Repeater inputs (repeater IN)

70cm Frequencies Table (420.000MHz – 450.000MHz)

The 70cm ham radio band is another of popular frequency bands for amateur radio operators. It runs from 420.000MHz to 450.000MHz and offers a wide range of communication options, including voice, data, and digital modes like D-STAR and DMR. Many hams use the 70cm band for local repeater systems or simplex communication with friends in their area.

This article, also on Ham Encounters, may be of interest:  The Phonetic Alphabet

One advantage of the 70cm band is its ability to penetrate buildings and other obstacles better than higher frequency bands like 2m. This makes it ideal for operating inside structures or in urban environments where line-of-sight communications may be difficult. Additionally, the narrow bandwidth of the 70cm band allows for more channels to be squeezed into a smaller space.

420.000 – 426.000 ATV repeater / experimental
421.250MHZ video carrier & control links
426.000 – 432.000 ATV simplex
427.250MHz video carrier
432.000 – 432.070 EME (Earth Moon Earth or “Moonbounce”)
432.070 – 432.100 CW / Weak signal
432.100 70cm calling frequency
432.100-432.300 Weak signal / mixed mode
432.300-432.400 Propagation beacons
432.400-433.000 Weak signal / mixed mode
433.000-435.000 Repeater links / Aux
435.000-438.000 Satellite (international)
438.000-444.000 ATV repeater IN
439.250MHz video carrier & repeater links
442.000-445.000 Repeater inputs and outputs
445.000-447.000 Aux control links / repeaters / simplex (shared band)
446.000 Simplex frequency (national)
447.000-450.000 Repeater inputs & outputs

CB Frequencies Table

Citizens Band (CB) radios have been popular for decades and are still widely used today. One of the main advantages of CB radio is that it operates on a set of specific frequencies, which means that anyone with a CB radio can communicate with other users who are tuned in to the same frequency. This makes it an excellent communication tool for individuals who need to stay connected while on the road or in remote areas. If you’re new to using CB radios, you may be wondering what frequencies are available and how they work.  The list includes 40 different channels ranging from 26.965 MHz to 27.405 MHz, some with its own unique purpose and usage guidelines.

This article, also on Ham Encounters, may be of interest:  A Brief History Of Ham Radio
Channel Frequency Typical Usage
1 26.965MHz General Use
2 26.975MHz General Use
3 26.985MHz General Use
4 27.005MHz General Use / Off Road Vehicles & 4x4s
5 27.015MHz General Use
6 27.025MHz General Use
7 27.035MHz General Use
8 27.055MHz General Use
9 27.065MHz Emergencies
10 27.075MHz General Use / Regional Roads Traffic
11 27.085MHz General Use
12 27.105MHz General Use
13 27.115MHz General Use / Marine & RV
14 27.125MHz General Use / Hand Helds (Walkie Talkie)
15 27.135MHz General Use
16 27.155MHz General Use / SSB
17 27.165MHz General Use / Truckers North + South Traffic
18 27.175MHz General Use
19 27.185MHz Truckers East + West Traffic
20 27.205MHz General Use
21 27.215MHz General Use / Regional Roads Traffic
22 27.225MHz General Use
23 27.255MHz General Use
24 27.235MHz General Use
25 27.245MHz General Use
26 27.265MHz General Use
27 27.275MHz General Use
28 27.285MHz General Use
29 27.295MHZ General Use
30 27.305MHz General Use
31 27.315MHz General Use
32 27.325MHz General Use
33 27.335MHz General Use
34 27.345MHz General Use
35 27.355MHz General Use
36 27.365MHz General Use / SSB
37 27.375MHz General Use / SSB
38 27.385MHz General Use / SSB + LSB
39 27.395MHz General Use / SSB
40 27.405MHz General Use / SSB

Tags: #amateurradio #hamradio #twometer #seventycm #citizensband #hamencounters #cbradio


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