This listing gives a correlation between the precise frequency of a radio crystal set and the shortcut "channel" number commonly used.
27mhz Band:
| Color | Channel | Frequency |
| Brown | 1 | 26.995 |
| Red | 2 | 27.045 |
| Orange | 3 | 27.095 |
| Yellow | 4 | 27.145 |
| Green | 5 | 27.195 |
| Blue | 6 | 27.255 |
75mhz Band:
| Channel | Frequency | Channel | Frequency | |
| 61 | 75.410 | 76 | 75.710 | |
| 62 | 75.430 | 77 | 75.730 | |
| 63 | 75.450 | 78 | 75.750 | |
| 64 | 75.470 | 79 | 75.770 | |
| 65 | 75.490 | 80 | 75.790 | |
| 66 | 75.510 | 81 | 75.810 | |
| 67 | 75.530 | 82 | 75.830 | |
| 68 | 75.550 | 83 | 75.850 | |
| 69 | 75.570 | 84 | 75.870 | |
| 70 | 75.590 | 85 | 75.890 | |
| 71 | 75.610 | 86 | 75.910 | |
| 72 | 75.630 | 87 | 75.930 | |
| 73 | 75.650 | 88 | 75.950 | |
| 74 | 75.670 | 89 | 75.970 | |
| 75 | 75.690 | 90 | 75.990 |