According to the Yaesu manual for these radios (see your radio manual).
Shown below for FTDX10, FT-DX1200, FTDX-1200, FTDX1200, FT-450, FT-450D, FT-950 (CONFIRM pins/functions with your radio manual!)
PIN 1 BLACK - + 13.8 VDC out
PIN 2 BROWN - TX GND (amplifier keying, we HIGHLY suggest using our RBI-1 Amplifier Buffer Interface, see https://www.ebay.com/itm/140456018374
PIN 3 RED - GND (ground)
PIN 4 ORANGE - BAND DATA A
PIN 5 YELLOW - BAND DATA B
PIN 6 GREEN - BAND DATA C
PIN 7 BLUE - BAND DATA D
PIN 8 PURPLE - TX INHIBIT
PIN 9 GRAY - ALC in (connect to your amplifier ALC jack)
PIN 10 WHITE - TX REQ IN
The FTM-100DR and FTM-400DR also use the same 10 pin jack but the FUNCTIONS are as described in the FTM-100DR and FTM-400DR manual. Use your manual to determine functions for any pins.
Want a less expensive Yaesu amplifier keying cable that uses the 8 pin mini-din?
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