Icom IC-720A Instruction Manual page 26

1. Remove the bottom cover.
previous ones) as shown.
5-7-10 LINEAR AMPLIFIER CONNECTION
The jacks on the rear panel marked Low Band ANT (RL)
and X-verter/Scope (ALC) are dual function, running from
these two jacks on the interior of the set are wires which
are connected to Plug P11. When this plug is connected
to J12 scope and transverter functions are available, when
connected
to J13 there
is a relay built-in
for keying a
linear, and the input for ALC from the linear. For linear
amplifier hookup the RL Jack is for an internal relay and
the ALC Jack is for ALC input.
Internal Connections for Linear Amplifier
1С-720А
LINEAR AMP.
Cable Connections of a Linear Amplifier"
LINEAR AMP.
Cable Connections for 1C-2KL
ACC Cable
ско 1С-7011С-720(А)
РОМ
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ЕБ POWER
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INPUT ANT
шординиини
1С-2К1.5Р
ос Power Cord
The IC-720A puts out the band control voltage to change
operating band automatically for external equipment such
as linear amplifier and antenna tuner. The voltage is put
out from Pin 13 of the accessory socket. (Refer to page 11.)
Band Control Voltage Chart
BAND (MHz)
Band Control Voltage