Hey Uboats,
Sure thing! I would love to help you out! :) In my video, at 53 seconds, I flip the switch you need to flip to turn on the radio. Find the video here: http://youtu.be/p55p7ECfYkU?list=UU7ATezx4GOhIIj9K5kxrDnQ For the Mig-15bis cold start mission, by default, the radio is set to the correct tower frequency, so you don't have to worry about adjusting the frequency. Once you flip that switch, you should be able to contact the tower, as per usual. If you did have to adjust the frequency, there is a dial, on the left hand side panel, that you can use to dial in the correct frequency for the tower you want to contact.
I hope I was helpful. Enjoy that wonderful Mig-15. She is so very lovely!
:thumbup: MJ