Well, you can make it a little short and add a base inductor to tap to get
the high end of the band, or you can make it a little long and shorten it
with a variable cap.

W4ZCB
"hasan schiers" wrote in message
...
This is a source run for an inverted L antenna for 80m that is 43 feet
vertical and 23 feet horizontal.

What would be the simplest matching network to use to produce a flat
match.
My primary use would be 80m low angle work at 3.7 and 3.5 Mhz, but also
want
to be able to use it (with a tuner, of course) for a local net at 3.97
megs.

While a 1.7:1 vswr at resonance is usable, I would like to get my starting
point as low as possible to maintain some sort of reasonable vswr at the
band edges, for those times when I need to check into the net.

By simple I mean no caps...they are not all that easy to find (in a hurry)
any longer. I need power handling of 500w. My two thoughts are some sort
of
1/4 wave transformer (although that's a lot of coax), or a simple toroidal
transformer.

Any suggestions? Core material for the toroid (including availability),
turns ratio, etc? Or is a toroid a bad idea for this app?

TIA,

...hasan, N0AN


EZNEC ver. 3.0

Vertical over real ground 5/28/2005 6:39:29 AM

--------------- SOURCE DATA ---------------

Frequency = 3.71 MHz

Source 1 Voltage = 29.15 V. at 0.61 deg.
Current = 1 A. at 0.0 deg.
Impedance = 29.15 + J 0.308 ohms
Power = 29.15 watts
SWR (50 ohm system) = 1.715 (75 ohm system) = 2.573