RadioBanter - View Single Post - Current in antenna loading coils controversy

October 30th 03, 10:55 PM

oSaddam (Yuri Blanarovich) wrote in message ...
NM5K

Dunno, I think it varies. But I sort of agree with Tom, I think it's
fairly constant across the coil.

MEASURE or FEEL it! Or disprove what W5DXP is saying.

Dunno, he seems to be saying about the same thing. It depends where
the coil is mounted.

It appears that current drop is proportional to the current drop in the section
of the antenna that is "missing" - replaced by the coil. You can express it in
electrical degrees and it appears to correspond to cosine distribution.

I could buy that to an extent I guess. But say if you had a top loaded
vertical, with linear current distribution, the current across the
coil should be appx equal no matter where the coil is placed. But if
no top loading, maybe so.. MK