I realized shortly before the last FO-29 pass that both FO-29's and VO-52's AOS were seconds apart on the east coast of the United States, so I decided to scan the upper half of the passband in LSB to see if I could hear any signals. I heard a weak CW signal and also a conversation. Unfortunately, I could not copy any callsigns, but I clearly heard a voice saying "73" as my dial read 435.902 MHz LSB about halfway through the FO-29 pass.
Cool to hear! I know I've heard the AO-73 beacon via FO-29 before, but never a conversation from another satellite.