This is kind of a "newbie" thing, but would have helped me out recently.Crystals. We (in the US) use 72Mhz band for our radios receivers (RX) and transmitters (TX). You must use the same channel of crystals in your RX and TX. Me, being new, was not sure how to take a Mhz rating, and match that with a channel. Keeping things simple here is a standard chart. Most are included. This is helpful if somebody is selling a "72.110Mhz TX crystal" and your RX crystal just says "CH 16".
Chan 15 72.090 MHz Chan
38 72.550 MHz
Chan 16 72.110 MHz Chan 39
72.570 MHz
Chan 17 72.130 MHz Chan
40 72.590 MHz
Chan 18 72.150 MHz Chan
41 72.610 MHz
Chan 19 72.170 MHz Chan
42 72.630 MHz
Chan 20 72.190 MHz Chan
43 72.650 MHz
Chan 21 72.210 MHz Chan
44 72.670 MHz
Chan 22 72.230 MHz Chan
45 72.690 MHz
Chan 23 72.250 MHz Chan
46 72.710 MHz
Chan 24 72.270 MHz Chan
47 72.730 MHz
Chan 25 72.290 MHz Chan
48 72.750 MHz
Chan 26 72.310 MHz Chan
49 72.770 MHz
Chan 27 72.330 MHz Chan
50 72.779 MHz
Chan 28 72.350 MHz Chan
51 72.810 MHz
Chan 29 72.370 MHz Chan
52 72.830 MHz
Chan 30 72.390 MHz Chan
53 72.850 MHz
Chan 31 72.410 MHz Chan
54 72.870 MHz
Chan 32 72.430 MHz Chan
55 72.890 MHz
Chan 33 72.450 MHz Chan
56 72.910 MHz
Chan 34 72.470 MHz Chan
57 72.930 MHz
Chan 35 72.490 MHz Chan
58 72.950 MHz
Chan 36 72.510 MHz Chan
59 72.970 MHz
Chan 37 72.530 MHz Chan
60 72.990 MHz
Burke~
