Hello,Well, this certainly isn't the question about the 747! :-lolRather, when I fly a PMDG 737, and when the VATSIM controller for example changes me to some frequency, enter that frequency into PMDG Radio and that in that moment both SB2.3 and AVC change their frequencies automatically, too??? Basically, that I don't have to switch applications to change the controller while in the flight.

Have a look at http://www.simhardware.co.nz/ for AVC tuner add on.Patrick O'Sheridan

Thanks! Exactly what I was looking for...

I just want to add, I'm using this too, but for me I have to dial in the new freq. in the same samll "digit window" as the old freq. It will not work for me if I dial in the new freq and then push the switch button.I don't know how to explain this very well. :)