[Elecraft] KPA500 Inhibit Line

[j-meister at comcast.net]

Setup is Yaesu FTDX3000 xcvr --> Elecraft KPA500 amp --> LDG AT1000ProII tuner. I am using a cable 
between the FTDX3000 and KPA500 to transfer band data and the key line (KPA500 Aux Pin 10). I would 
like to use the open-collector interface on the AT1000 (which is pulled low during tuning) to pull 
the KPA500 Inhibit (Aux Pin 11) line low so that I am not running high power into the tuner during 
tuning. (Note: I will also at the same time use the open-collector output to pull the correct line of the 
FTDX3000 low to enter the low power CW key-down mode.) 

Any "gotchas" with this scheme? The KPA500 will be keyed up via Aux pin 10 at the same time it will 
be inhibited via Aux pin 11. Is there a delay I have to be worried about? Is there an order of the 
pull-downs that matters? Am I going to get a few msec bump of high power? 

I realize that one normally interrupts the amp via the key line, but it seems a little more straightforward 
in my particular case to do it via the inhibit line. 

Jim, K2WU