On Wednesday, February 25, 2015 at 11:20:35 PM UTC-8, Paul B wrote:
I am wondering if it is possible to combine the outputs of a vario and a radio and send it to one speaker. I did try to Google it, but I did not find a satisfactory answer.

Any ideas please?


Cheers

Paul

Look into motorcycle intercoms. There are a number on the market, one common feature is combining audio sources such as the other passenger, the stereo, and cell phone. They typically do it in a priority scheme such that the stereo (vario) will be muted or attenuated while the passenger (radio) speaks, when done the stereo ramps back to normal volume. Small box, doesn't use much power, doesn't cost what anything stamped "for aircraft" cost.