Interfacing To Other Linear Amplifier - Yaesu FT-410 Operation Manual

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The T/R control line is a transistor "open collector" circuit, capable of handling positive amplifier relay coil
voltages of up to +50V DC and current of up to 400 mA. If you plan on using multiple linear amplifiers for
different bands, you must provide external band-switching of the "Lin Tx" relay control line from the "TX GND
OUT" line at the LINEAR jack.
Important Note!
Do not exceed the maximum voltage or current ratings for the "TX GND OUT" line at the LINEAR jack.
This line is not compatible with negative DC voltages, nor AC voltages of any magnitude.
Most amplifier control relay systems require only low DC voltage/current switching capability (typically,
+12V DC at 25 ~ 75 mA), and the switching transistor in the FT-410 will easily accommodate such
amplifiers.
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Linear Amplifier Connection Cable ( SCU-28 )
Color Code Information
LINEA Jack ( Pin Number )
Wire Color
Orange
Yellow
Green
Red
White
Blue
Violet
Brown
Black
Gray
Light Blue Case
l A
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Function
1 +13.8 V
2 TX GND OUT
3 GND
4 BAND DATA A
5 BAND DATA B
6 BAND DATA C
7 BAND DATA D
8 TX INH
9 EXT ALC IN
10 TX REQ IN
Shield
FT-410 O M
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