On Wednesday, June 12, 2019 at 9:03:49 AM UTC-7, SC wrote:
Has anyone successfully used pin 4 to connect a vario audio to the speaker for a Dittel FSG 2T radio? I tried this with a ClearNav Vario and was not successful. The manual indicates that this should work, but states that this feature is optional. I don't know if this means that it is an optional connection or if it is an optional feature for the radio. I am trying to eliminate a speaker in the cockpit.
Thanks, Sandy

Available on a lot of radios. I haven't tried it, primarily since every radio will mute or at least duck the auxiliary audio with radio reception and the audio vario will be lost.
Jim