Aerials (Antennas) & Earth Systems - AOR AR8000 Operating Manual

WA7000 wide band active whip aerial
Compact aerial designed for installation where space is a problem. The
WA7000 is active on the lower frequency band 30kHz to 30MHz and passive
on the higher band between 30MHz to 2000MHz.
DA3000 VHF-UHF discone aerial
16 element VHF - UHF discone aerial with useable coverage of 25 MHz to
2000 MHz. Supplied with cable and connectors etc.
ABF125
VHF civil airband filter to reduce the chances of breakthrough especially from
powerful VHF band-2 transmitters.
(22) Aerials (Antennas) and earth systems
The subject of aerial choice and earth can be quite complex. There are many
advantages and disadvantages to consider before connecting an external aerial
to your receiver.
Theory and practice
One interesting phenomena is that aerial theory and practice can be
surprisingly different. Keeping common sense in mind it is one of the few
remaining areas for listeners to easily experiment and often achieve fantastic
results.
Whip aerial
The supplied 16cm semi-flexible whip aerial should give adequate results for
general hand-held operation on the VHF and UHF bands.
A longer wire aerial or telescopic whip should be considered for listening to the
shortwave bands.
The AR8000 has an internal ferrite bar aerial for medium wave reception. For
best signal rotate the receiver as the bar aerial is directional.
Mounting location
It is important to mount any external aerial as high as possible and in clear
space although this is more important at VHF frequencies than for shortwave.
If possible the aerial should have a clear path to the horizon. Results are
usually disappointing when an installation is in a loft space.