Topband: Sharing Radials

[Eric Rosenberg]

I may have an opportunity to put up 80m 1/4 wave wire as a straight 
vertical or inverted-L adjacent to my 160 inv-L (same tree).  It looks 
like I won't be able to share the feedline with the 160 antenna -- it's 
too hard/cold to unwrap and re-connect the existing 160 feed.

Question:

Can I share the radials... tie the shield of the 80m coax to the (26) 
160m radials?  What's the tradeoff?

Thanks!

73,
Eric W3DQ
Washington, DC