I fly on channel xx. A quarter wave antenna for that frequency would be xx", not the 9Z antenna’s
full length. Would I be better off using that transmitter antenna length instead of it fully extended?
Each Futaba transmitter has been tuned so that it will get the maximum output with the antenna
provided. The FCC certification was made with that antenna. The tuning circuitry in the transmitter
makes allowances for any differences in the actual length of the transmitter antenna, and the
theoretical ideal length. You should fly your models with the transmitter antenna fully extended. If
you shorten it, you will suffer a considerable decrease in range.
1-2
50 MHz 72 MHz Low Band 72 MHz High Band
Ch. Freq. Ch. Freq. Ch. Freq. Ch. Freq. Ch. Freq.
00 50.800
01 50.820
02 50.840
03 50.860
04 50.880
05 50.900
06 50.920
07 50.940
08 50.960
09 50.980
11 72.010
12 72.030
13 72.050
14 72.070
15 72.090
16 72.110
17 72.130
18 72.150
19 72.170
20 72.190
21 72.210
22 72.230
23 72.250
24 72.270
25 72.290
26 72.310
27 72.330
28 72.350
29 72.370
30 72.390
31 72.410
32 72.430
33 72.450
34 72.470
35 72.490
36 72.510
37 72.530
38 72.550
39 72.570
40 72.590
41 72.610
42 72.630
43 72.650
44 72.670
45 72.690
46 72.710
47 72.730
48 72.750
49 72.770
50 72.790
51 72.810
52 72.830
53 72.850
54 72.870
55 72.890
56 72.910
57 72.930
58 72.950
59 72.970
60 72.990
Radio Frequency Chart
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