For some reason my Icom 746 Pro ATU will not work on 15m when loading a
C31XR feed with separate feedlines. The swr is below 1.5:1 from 21000 to
21400 and rise to 2.2 at 21450. The ATU works fine if I try to load the 20m
ant on 15m so I presume the ATU is work - at least some what.
The impedance of the antenna measured at the rig at the end of feedline that
is cut to multiples of lamda/2 on 15m ranges from 50-j1 to 35+j32.
The ATU works fine on other bands under similar conditions.
Any suggests why this might be the case?
tnx Syl
Sylvan Katz - VE5ZX
Saskatoon, SK
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