935B小环天线调谐器,上面的白色塑料管,是为了直接插一个PVC管做成的十字架,以便将天线固定成为菱形、圆形或者其他形状。
下面是高效能small loop但波段,多波段数据。
Table 3: MFJ – 935B Most Efficient Single-Band Loop Lengths
Band (meters) Most Efficient Single-Band
Loop Lengths (feet) ___高效率单波段:
80ft 63.0 /19.20m
40 28.0 /8.534
30 20.0 /6.096
20 13.0 /3.962
17 9.0 /2.7432
15 7.0 /2.134
12 5.5 /1.676
10 4.0 /1.219
Table 4 lists the loop lengths for the most convenientband coverage. These
lengths will allow the most frequency coverage for each loop.
Table 4: MFJ – 935B Convenient Multi-Band Loop Lengths
Band (meters) Convenient Multi-Band Loop
Lengths (feet) -----多波段使用:
40--30 20.0
30--20 13.0
30--20-17 9.0
20--15 7.0
17-15-10 4.0
The loop can be constructed from wire,tubing, sheet, and an especially good
material is 1” wide PC board. However, finding a piece of PC board long enough
to form into a circular loop for 7.175 MHz may prove to be difficult! This leads us
to the unique opportunity to EXPERIMENTwhile using the MFJ-935B Loop
Tuner
TM
to resonate the loop antenna you design.
[ 此帖被bd2bh在2014-10-05 18:07重新编辑 ]