[Antennas] Next dumb question

Fri Nov 23 12:39:57 EST 2012

Is a capacity hat electrically connected (metal to metal) to the antenna
itself or is it just sitting there insulated but "capacitively coupled"?

The coil I bought was supposed to be for 15 to 80 meters. Well.. It only
tunes down (no coil) to about 4.1 and SWR is too high to use even at 3.963
MHz (and it won't go into the 15 meter band either, 20 is tops). OK,
shorter whip for 15. 

But, for 80 meters, thinking about stationary operation and adding a
temporary top hat to bring me into the top end of the band. 

Better yet, also thinking about adding a few turns of extra coil at the base
to bring the whole thing down a bit. How much would it take me to move from
4.1 down to 3.9 or so using existing coil for adjustment and my 102 in whip?
Say #12 THHN close wound on a 2 inch form (6,8,?)