[Elecraft] Using Yaesu FT-991 with KPA500

[barthold]

Hi, 

I know this is an old post, but sharing my recent experiences.

I did build a Yaesu FT991 to KPA500/KAT500 aux cable. The actual pin
connections needed to go from the 8 pin mini din on the 991 to the 15 pin
connector for the KPA500/KAT500 is described in the KPA500 manual. The
section appropriately named "Yaesu cable". 

What this will do is two things:

1) Eliminate the need for a key line (unless you have a need for a separate
keyer)
2) Control the KPA500 to switch bands when you select a new band on the 991

Note you need to set the FT991 menu option 143 (tuner) to "LAMP", to make
this work.

What does not work, unfortunately, is to get the FT991 to provide a RF
signal when you push the tune button on the KAT500. Which would have been
awesome. Does anyone know how to achieve this by any chance?

The best way I have found to tune with this combo is to switch to CW mode
and simply key the microphone on the 991. This will provide the necessary RF
power for the tuner to do its work. Then of course switch back to the mode
you need. Not ideal.

73,
Barthold / AD0RM







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