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CTCSS Codes

 

CTCSS (Continuous Tone-Coded Squelch System) Codes

CTCSS Hz   CTCSS Hz   CTCSS Hz
1 67.0   14 107.2   27 167.9
2 71.9   15 110.9   28 173.8
3 74.4   16 114.8   29 179.9
4 77.0   17 118.8   30 186.2
5 79.7   18 123   31 192.8
6 82.5   19 127.3   32 203.5
7 85.4   20 131.8   33 210.7
8 88.5   21 136.5   34 218.1
9 91.5   22 141.3   35 225.7
10 94.8   23 146.2   36 233.6
11 97.4   24 151.4   37 241.8
12 100.0   25 156.7   38 250.3
13 103.5   26 162.2   122* 69.3

*Some radios use 69.4 Hz instead, which better fits the harmonic sequence, and this tone is often omitted as a choice.

CTCSS codes are functions that reject undesired signals on your channel. You will hear a call only when you receive a signal that contains a matching CTCSS tone or DCS code. If a call containing a different tone or code is received, squelch will not open and you will not hear the call. Likewise, when transmitting using CTCSS or DCS, the receiving station must have a matching tone or code to hear your call.Be aware that other parties can still hear your calls if they set up their transceiver with the same tone or code.




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