Aerial (Antenna) Connection - AOR The New Classic AR3030 Operating Manual

Brown: Live
Blue: Neutral
The AR3030 power supply has no connection to the EARTH pin of the mains
plug. However a separate earth point is provided on the rear panel of the
AR3030 for connection to a water pipe, central heating system radiator or
external earth rod. If fitting a separate external earth rod, consider the
implications carefully is your mains supply uses Protective Multiple Earth (PME)
system. If in doubt consult an expert electrician. Never earth to a
gas pipe!
Always disconnect the power supply from the AC mains supply when not in use.
Always remove dry batteries when exhausted or if the AR3030 is not going to
be used for a while. This will avoid leakage which could seriously damage the
receiver.
Access to the battery compartment is via a removable sub-panel on the rear
panel. Always switch the receiver off when inserting or removing batteries. If
fitting batteries always select a quality brand, 8 x AA size 1.2 or 1.5V cells are
required.

4-4 Aerial (antenna) connection

The low impedance aerial input is of a high quality BNC type as preferred by
commercial users rather than the cheaper SO239 type. Adaptors are readily
available to convert from a BNC to almost any other plug or socket as required
allowing straight forward connection to almost any shortwave aerial.
The second input is a "jaw" designed for a high impedance long wire. An earth
connection is also provided on the rear panel.
A rear panel three position slide switch selects the 50 OHM BNC connector or
high impedance wire input. The third position applies a preamplifier and
impedance matching network to the BNC aerial socket which may be used in
conjunction with a telescopic whip aerial to enable a level of operation away
from a long wire aerial or more elaborate system.
The AR3030 does not contain RF amplification prior to the band-pass filters, all
gain is applied in the more selective IF stages. This ensures the highest
immunity to intermodulation effects often caused by the high number of strong
signals encountered on the shortwave bands.
An aerial attenuator system allows selection of 0db, 10dB or 20dB from the
front panel. RF gain is also available via a front panel rotary control, this is
especially useful in providing optimum audio quality for SSB operation. AGC
attack / decay may also be selected from the front panel either fast or slow but
cannot be switched off.
AR3030 operating manual
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