Acom 700S User Manual page 16

c) KEY-OUT socket
Transmit-enabling control output from amplifier to the transceiver.
The KEY-OUT socket on the rear panel provides an extra control signal from the amplifier to the
transceiver. It can be used for improving the receive/transmit (RX/TX) switching safety.
KEY-OUT is a low-powered open-collector output, make sure that the signal voltage
coming from the respective transceiver connection does not exceed 50 VDC (open
circuit) and the closed-circuit current is below 20 mA.
If your transceiver has a suitable input that disables transmission unless grounded externally, we
recommend that you connect it with a shielded cable terminated in a Phono (RCA) connector to the
KEY-OUT socket of the amplifier.
ACOM 700S will operate normally with KEY-OUT unconnected if your transceiver has no
such input.
Transceiver producers give different names to this input and they are for instance
TX-INHIBIT, MUTE, LINEAR, etc. Check your transceiver's manual.
d) RF INPUT
Connect a suitable coaxial cable from the transceiver output to the amplifier RF INPUT SO-239 socket (on
the rear panel), using PL-259 plug.
In order to avoid a damage, turn off your transceiver's internal antenna tuner.
e) RF OUTPUT
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 10- 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).
Connect a suitable coaxial cable with a PL-259 plug from the RF OUTPUT (on the rear panel) to the antenna
switch or tuner, or to antenna for the respective frequency band.
Page 16 of 52 | S e c t i o n INSTALLATION
User's Manual | ACOM 700S | 1.8-54 MHz Linear Amplifier
NOTICE
NOTICE
NOTICE
May 2021