Tom,
If I understand your note, you are connecting the ladder line from 
the G5RV directly to the K850.  If this is the dcase, it might well 
be your problem.  The G5RV uses a specified length of coaxial cable 
as a part of the radiating system.  I believe that the spec. for my 
version of the G5RV specified seventy feet of 50 ohm cable.
Does this help?
Pat, K9JAUAt 02:54 PM 4/2/2006, you wrote:
>Thanks for all six of the responses I have received so far. The Kenwood
>850 has an internal antenna tuner. It worked fine last year  at Handihams
>radio camp in Malibu.  That was with a G5RV. The R7 is just like it was
>when I acquired it from the estate of silent key Bob Larson, except for
>one joint half way up the mast and the 10 radials at the base. Would
>polishing up the surface do any good or does rf not care? I couldn't use
>it San Francisco because my lot was only 22 feet wide, but now I have 75
>by 300 feet. First I'll try the suggestion from two of youto put the twin
>lead straight and perpendicular to the long line, but at an angle to the
>ground. I's new and connects directly to the transmitter. I've used two
>different coax cables on the R7 with identical results. The ground is
>fine. I could get the G5RV higher if I could figure out what to use as a
>non-metallic mast. Any ideas?  Would it be worth buying an external
>antenna tuner to use instead of the internal a t in the K850?
>Again, thanks for all the quick help. I don't stay on this list because
>there is too much traffic for me to add to what else is coming through,
>but it is great to get back on now and then. I'm always available at
>[log in to unmask]
>Tom Karnes K6FUN
>73