[CQ-Contest] Multi-op transmit inhibit for TS-590S ?

[Steve London]

Has anyone found a way to add a transmit inhibit to the TS-590S ? The 
idea is to implement a lock-out capability in a multi-transmitter 
environment. Most modern radios have an input line the allows the 
transmitter to be inhibited, whether using PTT or VOX. I don't see such 
a capability with the TS-590S.

I have a few ideas on how to implement this, but thought it would be 
good to see if anyone has already done this.

73,
Steve, N2IC