Hey Guys
Thanks to all for your input

Its nice to know what others are doing on the trumpet for vibrato and why.
Hey Manny
Thanks for your input on this subject, a trumpet player of your calibre is always welcome. I think its really interesting Manny that you listen to singers! I kind of thought you might do that as well...very cool. About 10 years ago when I was looking to further develop my playing, I was watching an indepth interview with Holy Cole of the Holy Cole Trio. She said that she always studied and listened to instrumentalists and incorporated much of what she heard into her singing. When I heard her say this I started to listen to top singers like Streisand, Pavoroti, Frank Sinatra, Josh Groban etc and it really helped to develop my technique, style and introspective. Sometimes I think that Trumpeters and Singers are inseperable.
Hey BPinard
I've been doing hand vibrato since day one, so for me its natural. I would sugest that you get a Harry James method book, or maybe look it up on the www and do some arpegios using this technique. It may take some time but practice makes perfect! Good Luck
Rick AKA Trumpet Man