80-40 dipoles

Pete,

Sorry I managed to lose your address in the space of an hour.

The problem you note in connecting two Vees or dipoles is part of the
program, and appears regardless of tapering. However, there is a cure.

At the center of your model, place a 2-segment wire and feed its center.
Then, conntect your wires to the ends of this new wire, an 80 and a 40
meter piece to each end. If you taper your wires (ordinarily an optional
procedure with your model), then you can make the new center wire
segments equal the shortest segments at the center. Otherwise, make the
length of the center wire segments fall within the
ratio-of-joining-segments rules for MININEC. This may mean using more
segments per half-wavelength than usual for the wires. You will find that
you can derive quite accurate results for both frequencies from the single
feedpoint. Moreover, it reflects to some degree actual multi-dipole
construction, which often uses a wide insulator, with the elements
connected mechanically to the ends and a single wire from each end to the
feedpoint.

Hope this helps.

-73-
LB, W4RNL

I apologize to the list for losing Pete's address.
Received on Wed Nov 08 1995 - 16:44:00 EST