The 1/32 brass wire is a little wide for antenna at 1/35 scale, it turns out. However, the guitar string, once the outside "spring" is stripped off, is perfect! Very flexible, and with the wrapping coiled at the bottom, very realistic looking.
4mm beads are too large for the ball on top of the antenna, it turns out. Probably 2mm would be better, but they're hard to find.
Anyway, thought you all might appreciate the update.