I've never seen anyone get Virtualwire to both output and input at the same time.
You are testing with 2 arduino's, one transmitting and 1 receiving?
Yes, 2 arduino's. One is sending data, the other is recieving.
Want to make a weatherstation.....
Please post a RD413 spec.
Here are some specs:
http://www.geeetech.com/433mhz-rf-link-kit-p-160.html
Gr.