When I has took the
CDs in hands I at once has known what I do with it. Of course,
it would be dipole Nadenenko! (See References
1) and the CDs would be form its shape!
Mine GP for the ten meters does not work good at the edges of the ten, SWR there was too high. Well,
the antenna rod that was used in my GP has a small diameter. With
the CDs I could be made a GP near 100 mm in diameter. For me it
took several hours
to do the antenna having 50 Ohm input impedance and pass band
more the 3 MHz.
For manufacturing the antenna you need 4 plastic
ski sticks, 16 bad CDs, 16 pieces of a copper wire in 2.35 meter length, a piece of a strong
plastic in 20 cm length
and 4 cm in diameter.
Radio club ‘Arktika’
Photo Credit Line:http://www.arktika.komi.com/Champ_2004.htm
Ski sticks (each to pairs)
are jointed with the help of pieces of aluminum tube. Length of
each shoulder of the dipole is 2.30 cm. Ski sticks are inserted
into the axial hole in the piece of plastic. Figure
1 shows the design. DX and 73!
1. Dipole Nadenenko
PDF file, 250 KB (ANTENTOP-02-2004)