User's Manual | ACOM 500S | 160-4
m Linear Power Amplifier
Page 22 of 66 | S e c t i o n INSTALLATION
March 2023
e)
RF OUTPUT 1
connector
NOTICE
If this is the first time you will use a power amplifier in your station, pay attention to the
coaxial cable type from the amplifier's output to the antenna. It must handle the increased
power safely, particularly on the 4- and 6 meters bands. We recommend that you use
RG213 cable or better. Check the same for the antenna switch and tuner, as well as the
whole antenna system (especially multi-band trap antennas).
The
RF OUTPUT 1
provides seamless integration with the auto-switching antenna tuners ACOM 04AT and
ACOM 06AT, for access from amplifier's front panel to 4 antennas having an SWR up to 3, in the 160 to
6 meter bands.
Connect a suitable coaxial cable with a PL-259 plug from the
RF OUTPUT 1
, Pos. (e)) to the ACOM 04AT or 06AT Automatic Antenna Tuner with Switch for operation on the
lower amateur bands 1.8 to 54 MHz (160 to 6 meters).
Leave
RF OUTPUT 1
unconnected and use
RF OUTPUT 2
if you do not have ACOM 04AT or ACOM 06AT tuner.
f)
RF OUTPUT 2
connector
NOTICE
If this is the first time you will use a power amplifier in your station, pay attention to the
coaxial cable type from the amplifier's output to the antenna. It must handle the increased
power safely, particularly on the 4- and 6 meters bands. We recommend that you use
RG213 cable or better. Check the same for the antenna switch and tuner, as well as the
whole antenna system (especially multi-band trap antennas).
A well-matched antenna with an SWR below 1.5 can be connected to the
RF OUTPUT 2
for any band. While
low SWR is good on any band, it is extremely important on 6 and 4 m.
Connect a suitable coaxial cable with a PL-259 plug from the
RF OUTPUT 2
, Pos. (f)) to the antenna for the respective frequency band.
If 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), we suggest to connect your
antenna for 70-70.5 MHz (4-meter band) to the
RF OUTPUT 2
connector. Switch between the two outputs
by assigning and unassigning the tuner in the USER PREFERENCES menu. Assign the tuner in order to select
the
RF OUTPUT 1
for operation on 160 to 6 meters with the tuner or unassign it to select the
RF OUTPUT 2
for operation on 70-70.5 MHz (4-meter band) with a well-matched antenna.
If you do not have an ACOM tuner available then you may leave
RF OUTPUT 1
unconnected and use the
second connector
RF OUTPUT 2
for all bands from 1.8 to 70.5 MHz (160 to 4 meters). You should change
antennas manually and they should be well matched to a SWR below 1.5 in this case. The ACOM 04AT and
06AT won't work from
RF OUTPUT 2
so use another tuner to reduce SWR below 1.5 at
RF OUTPUT 2
.
