D Connecting A Non-Icom Linear Amplifier - Icom IC-7100 Advanced Instructions

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INSTALLATION AND CONNECTIONS
Linear Amplifier Connections (Continued)

D Connecting a non-Icom linear amplifier

To connect a non-Icom HF, 50/70*
* 1 70 MHz band transmission is available, depending on the transceiver version.
To an antenna
Non-Icom Linear amplifier
RF OUT
RWARNING!
The SEND terminal of the linear amplifier must be connected to the HSEND (ACC connector pin 3) for the HF, 50/70*
MHz bands, and to VSEND (ACC connector pin 7) for the 144/430 MHz bands. An external relay must be used.
* 70 MHz band transmission is available, depending on the transceiver version.
When the HSEND (or VSEND) terminal controls the inductive load (such as a relay), a counter-electromotive force
can damage or cause the transceiver to malfunction. To prevent this, add a switching diode on the load side of the
circuit to the counter-electromotive force absorption.
• We recommend adding a switching diode, such as an "1SS133".
• When the diode is added, a switching delay of the relay may occur. Be sure to check its switching action before
operating.
The ALC input level must be in the range 0 V to –4 V. The transceiver does not accept positive voltage. Non-matched
ALC and RF power settings could cause a fire or damage the linear amplifier.
When using a linear amplifier such as IC-PW1/EURO, adjust the output power to stay within the ALC zone by pushing
(C). For ALC zone information, refer to 'Basic transmit operation.' (p. 3-23)
MIC/RF PWR
When using a linear amplifier that has a time delay between receiving and transmitting, a high SWR might cause the
linear amplifier to malfunction. To prevent this, slow the TX Delay the "TX Delay" settings in the "Function" Set mode.
(p. 17-19)
Function > TX Delay
SET (C) >
L eft D isplay R ight
C enter
1 MHz bands linear amplifier, see the diagram below.
RF IN
ALC
SEND
Relay
Switching diode
The L, R, C or D in the
instructions indicate the
part of the controller.
L: Left side
R: Right side
C: Center bottom
D: Display (Touch screen)
[ANT1]*
ALC (Blue)
HSEND
(Orange)
IC-7100
/VSEND
13.8 V (Gray)
* 2 When connecting a 144 MHz or 430 MHz band's liner am-
plifier, connect to [ANT2].
2-10
2
GND
ACC
13-pin plug with ACC cable