If you wind the helical coils with large spacing between turns--pretty
close...

The capacitance across the windings of the coils will be the most
notable effect, and will induce a need to shorten the electrical
length of the element conductors, keeping that capacitance to a
minimum may allow this need to be insignificant. If not, just trim
wire length a bit.

Best might be to set up with a "wand" which can be lengthened or
shortened a bit on each element which is so shortened by a coil.

John

wrote in message
oups.com...
I would like to make it half-size.

Can I just take the full-size dipole and roll the extra copper into
a
coil in the center?

de KJ4UO