CHA 40/20 FD
Page 3
Introduction
Thank you for purchasing and using the Chameleon Antenna
TM
40 / 20 Meter Fan Dipole antenna (CHA 40/20 FD).
The Fan Dipole antenna, see figure (1) and plate (1), is a High Frequency (HF) antenna designed to provide a field-
tunable resonant portable antenna for two of the most popular amateur radio bands. This antenna will provide long-
range communication on both the 7 and 14 MHz (40 and 20m) bands utilizing skywave propagation and short-range
communication using Near Vertical Incidence Skywave (NVIS) propagation. Due to
the antenna’s
small size and
rugged construction, it is ideal for temporary setup at a campsite or emergency shelter and durable enough for semi-
permanent installation at a base station - even RV sites or dense suburban housing with small yards should be able
to accommodate this antenna. Without an antenna tuner, the Fan Dipole can operate on the 40 and 20m amateur
radio bands. A wide-range antenna tuner will also enable operation on the 17, 15, 12, and 10m bands.
Figure 1. Fan Dipole Antenna.
The Fan Dipole can easily be configured in either a
Flat-
Top (horizontal dipole) or Inverted “V”
configuration or one band as a Flat-Top and the other
as an Inverted “V” for maximum installation and
operating flexibility.
Plate (1). Fan Dipole Antenna.
An antenna tuner is not required on the 40 or 20
meter amateur radio bands, but is required for
operation on other bands.
The Fan Dipole antenna is comprised of a weather-
resistant BALUN center transformer, a 7 MHz dipole,
and a 14 MHz dipole. Due to the Fan Dipole design,
both resonant dipoles are fed from a single 50 Ohm
coaxial cable - simplifying connection to your radio.
Antennas built by Chameleon Antenna
TM
are
versatile, dependable, stealthy, and built to last.
Please read this operator’s manual so
you may obtain
the maximum utility from your 40 / 20 Meter Fan
Dipole antenna.
