AR2700 operating manual
9
Shortwave long wire aerials
For the shortwave bands a different type of aerial will be required. The most
common form is the random long wire connected to the centre terminal of the
BNC plug or wrapped around the retracted telescopic whip aerial.
Aerial Tuning Units (ATU)
An ATU can improve the selectivity of any shortwave receiver when connected
to long wire aerials. This valuable extra selectivity is achieved by the ATU
rejecting out of band signals enabling the receiver to “single out” one band of
frequencies while rejecting potentially strong unwanted transmissions.
Active desktop loop aerials
Usually designed for the shortwave bands (such as the AOR LA320). Loop
aerials have the advantage of small size when compared to long wire aerials
and being within easy reach of the operator they may be rotated to provide
directivity. The circuitry offers a small level of gain with the advantage of
selectivity similar to an ATU.
(5) Controls and functions
The AR2700 receiver is housed in an attractive and modern looking grey
plastic cabinet. Controls for operation are located on the top, front and left
hand side of the cabinet.
Top Panel
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