hi,
thanks for the replies...take a look at the following document. it has some interesting information regarding rg59 conduit fill.
http://www.brownstown.com/downloads/conduit-fill_require_.pdf

i got my dimension information from here: http://www.engproducts.com/products.cfm?ID=318

Still not sure. This is a COMBO CABLE/ COAX/#18 AWG PAIR

That was the best I had found until now!

Thanks for the replies..

regards

Mustang