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FT1000MP internal CW keyer can NOT be used together with outside PC keying.

The following modifications enable PC COM port to control radio frequency via
CAT cable and perform PTT and CW KEY functions at the same time.

1. Gain access to FT1000MP CTRL board by removing PA module
2. Cut PCB trace between IC 74HC32 pin 8 and 74HC04 pin 9.
3. Solder ordinary silicon diode 1N4148 between these two points.
4. Add 10K resistor from 74HC04 pin 9 to ground (this is also diode cathode)
5. Add 1K resistor with a long leads to CAT DB9 pin 4 (DTR) for keying
6. Solder 10K resistor to base of Q5003 digital transistor 2SC4047
7. Solder 1 nF capacitor with a short leads from other end of resistor to
ground.
8. Add a long wire from this joint to CAT DB9 pin 7 (RTS) for PC PTT control

Enjoy your flexible FT1000MP now!
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