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AR3030 operating manual
Although whip aerials allow you to start listening without delay they should only
be considered as a temporary aerial or for portability.
Of course a whip aerial may be connected directly to the VHF BNC 50 OHM
aerial input should the VHF converter option be fitted.
Long wire aerials
For shortwave reception a random length of long wire approximately 10 to 20
metres in length forms a good compromise.
The wire should be fed into the high impedance aerial input of the AR3030
receiver. If possible try to locate the receiver close to a window so that the wire
has the shortest and most direct run from the rear of the receiver to the outside
World.
Never attach the wire aerial directly to a support or wall. Instead attach a small
length (one metre) of insulating material such as nylon to each support (house
or tree for example) and then onto the aerial wire. Allow the wire aerial to drop
diagonally into the window and receiver rather than straight down the wall.
Keeping the aerial away from supports and building will reduce the loss of
signal from the wire aerial and prevent unwanted noise from entering the aerial
system.
Magnetic balun long wire aerials are becoming very popular as they allow
coaxial cable to be used as the down-lead from the wire aerial into the receiver.
The balun transforms the impedance to a low level suitable for 50 OHM coaxial
cable. In this instance the path of feeder is unimportant and chances of noise
entering the aerial system reduced. The 50 OHM BNC aerial input of the
AR3030 should be used and selected accordingly.
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