Acom 500S, User Manual

Page: 36 / 66

User's Manual | ACOM 500S | 160-4 m Linear Power Amplifier
Page 36 of 66 | S e c t i o n OPERATION March 2023
4.3.
Antenna Change
NOTICE
To avoid damage (not covered under warranty) do not change antennas while
transmitting. Do not transmit into an antenna output if it is not connected to an antenna
or a dummy load via a suitable coaxial cable with a PL-259 plug (see Sections
2.4.e) RF
OUTPUT 1
connector and
2.4.f) RF OUTPUT 2 connector
).
a) When you use the ACOM 04AT or 06AT Automatic Antenna Tuner with Switch connected to
RF OUTPUT 1 for operation on the lower amateur bands from 1.8 to 54 MHz (160 to 6 meters),
antennas are changed automatically, along with the band changes or manually by the ANT
button on the amplifier front panel, as described in the tuner manual (see Sections
2.4.e) RF
OUTPUT 1
connector and
4.4 Operation with an External Antenna Tuner
).
b) If you do not have an ACOM tuner with Switch available, then the connector RF OUTPUT 2 is
to be used for all bands and antennas. You may change antennas manually by either
reconnecting PL-259 coaxial cable connectors at
RF OUTPUT 2 or using an external antenna
switch (see Section
2.4.f) RF OUTPUT 2 connector
).