Cambridge Vario audio

[[email protected]]

I would like to use a Cambridge vario I have but it does not have the audio box AU... Does anybody have one they would sell? or have a schematic diagram which I could make one?
Thank you

[[email protected]]

With Cambridge L-navs listed as low as $100 bucks, you can't find a climb/cruise vario with audio any cheaper+ wind and single function distance measurement! Just took one out of a flying sailplane, give me a shout at johnsinclair210(at)yahoo.com
JJ