RedneckBill,
Go to Cabelas.com, they sell Randy Andersons Predator hunting videos. These videos are very educational and fun to watch.
The lonely female howl is is about a medium pitched howl that last about 3-4 seconds, and the wimper sounds like the ki-yi or hurt dog yelp, except it is real short yelps.
My favorite calls are Dan Thompson calls, although I started out with Primos calls which are good calls.
I hope this helps, Good Luck!!