I'm having trouble sending voice to my 6500 via the DAX TX channel while using a hardware PTT switch. VOX and MOX work fine But, the hardware PTT switch seem to only key the physically connected mics. I can see that making sense in many cases, but it's not what I'm looking to do. Am I missing something? The interface to SDRCat has me thinking that I can map a hardware serial port to an SDRCat PTT port but I'm not at all sure it means what I think it means.