[Lowfer] How do I make the ant. work above its resonant frequency ??

[Ralph W5JGV]

> The new lowFER Vertical is self resonant around 290 KHz roughly.
> It peaks very sharply, and drops out about 15 KHz up, and about
> 20 KHz below, so very narrow with the elevated coil.

<snip>

> I'm wondering if it's
> going to be usable only below its resonant frequency ??

There are several possible options.  You can add a series capacitor to the
antenna at the base, which effectively reduces the inductance.  That will
make it tune to a higher frequency.  The downside is that you still have the
loss of the extra loading inductance in the antenna.  Not good.

You can reduce the inductance by either by tapping down on some of the turns
of the loading coil or by  shorting out some turns.  You could also insert a
length of large diameter copper pipe inside the loading coil, which will act
as a shorted turn and reduce the inductance.

If it were me, I'd consider adding a switch to the coil to change taps on
the coil.  A pair or poly ropes to the switch would let you change the
switch as needed.  Somehow you need to reduce the inductance of he loading
coil.

It looks like you are in for another "antenna party!"

Have fun!

73,

Ralph  W5JGV - WD2XSH/7