[amsat-bb] Foxtelem and FT-736R

I've tried unsuccessfully to decode using the 9600 b output of my FT-857 into a sound card.

The manual for Foxtelem refers to pulling the discriminator signal out of the Yaesu FT-736R for decoding. However, it does not suggest a point on the circuit. I'm thinking to try between Q20 and Q21 on the RX unit. perhaps a 0.1 uf cap to the collector of Q20? Has anybody else tried this? Thanks, Tom, NH6Y