[quote]Hi Kevin,
If I may, I'd like to add something as well, when playing this chord, mute the 5th string, the A. Using your thumb for the F# in the bass makes it not very possible. So for that you might wanna use your index as already suggested by Suzi. Although I do use my thumb for that one all the time, but when strumming you really need to avoid the 5th string. Pick the 6th string (on the first beat for example, that is if you wanna use your thumb) and continue strumming the other strings bút the 5th string.
Sure, an A is part of a D-chord, but you don't want to hear that one when playing a F# in the bass.
Hope that helps as well!

Cheers
Vanessa
If i can add something to Ness's something, what is said about the muting of the 5th string applies to the D/F# but maybe not so much the D7/F# it can be left open and played.