TX670 INSTRUCTION MANUAL PAGE 25
CTCSS TONE FREQUENCIES
No. Frequency No. Frequency
1 67.0 20 131.8
2 71.9 21 136.5
3 74.4 22 141.3
4 77.0 23 146.2
5 79.7 24 151.4
6 82.5 25 156.7
7 85.4 26 162.2
8 88.5 27 167.9
9 91.5 28 173.8
10 94.8 29 179.9
11 97.4 30 186.2
12 100.0 31 192.8
13 103.5 32 203.5
14 107.2 33 210.7
15 110.9 34 218.1
16 114.8 35 225.7
17 118.8 36 233.6
18 123.0 37 241.8
19 127.3 38 250.3
(CTCSS frequency shown in Hz)
To send the Call Alarm Melody
Press the PTT switch twice quickly. The LED indicator
will light red for a few seconds as the melody is
sent. The melody will be heard in the speaker of the
receiving radio.