Tom,
You didn't ask me but . . .
I think fifty feet should do well for you and Universal Radio sells 
fifty foot lengths of RG8X with nice connectors attached.  So do lots 
of other places but their material seems good.
PatAt 07:32 PM 8/26/2012, you wrote:
>        Steve:
>
>I'm thinking of  replacing the coax from the G5RV to the PL259 on the back
>corner of the RV with a completely new run of RG8X.  I am not sure whether
>to go with 50 feet, or whether to get 75 feet just to be safe.  Remember,
>there is currently about 15 to 20 feet of RG8X from the corner of the RV to
>my operating position inside  It runs underneath the RV, and up through a
>hole in the floor to my operating position.  Obviously, this would be a real
>bear to replace.
>
>73 from Tom Behler; KB8TYJ
>
>----- Original Message -----
>From: "Steve Forst" <[log in to unmask]>
>To: <[log in to unmask]>
>Sent: Sunday, August 26, 2012 5:08 PM
>Subject: Re: G5RV Update: Good News!
>
>
> > Tom,
> >
> > I did come down the band around round table time, not really expecting
> > to hear anyone, but just to check it out.   I had been up around 7.203
> > for a couple of hours calling CQ and  dealing from time to time with a
> > hillbilly with no call and no signal who was upset  that I was on or
> > near his personal private frequency. He went away after a while.   It
> > was Saturday and I'm sure he had a date with his cousin.
> >
> > When you add the new coax to the antenna, will you  replace the existing
> > stub with a long, continuous run, or just add to what is already there?
> >
> > 73, Steve KW3A
> >
> >
> >
> > On 8/26/2012 4:55 PM, Tom Behler wrote:
> >>      Steve:
> >>
> >> I heard you work a station a little after round table time on or near
> >> 7.191
> >> yesterday afternoon.  I think it was Ashdebulah County.  I contacted them
> >> right after you, in hopes that you would hear me, but you were gone by
> >> then.
> >>
> >> You were about a 5 by 5 out at the RV.
> >>
> >> I would have let people know about my progress yesterday, so that we
> >> could
> >> have tried a QSO or two, but there's no internet out at the camp site, so
> >> I
> >> had no way to do that.
> >>
> >> I was also hoping that the round table would have been in session, but I
> >> think the Ohio contest put the damper on that for everyone.
> >>
> >> 73 from Tom Behler: KB8TYJ
> >>
> >> ----- Original Message -----
> >> From: "Steve Forst" <[log in to unmask]>
> >> To: <[log in to unmask]>
> >> Sent: Sunday, August 26, 2012 3:54 PM
> >> Subject: Re: G5RV Update: Good News!
> >>
> >>
> >>> Tom,
> >>>
> >>> Glad to hear it is working.  Hope it is not an intermittent problem that
> >>> will return again.   From all the posts over the past week, it sure
> >>> seems that there was something screwy in the original installation that
> >>>   is now resolved.
> >>>
> >>> Sorry we didn't cross paths yesterday.   I worked about 150 in the Ohio
> >>> QP, mostly on 40 SSB, but a few on 75 and a handful on 80 and 40 CW.
> >>> Would have been nice to hear you on the new antenna.
> >>>
> >>> 73, Steve KW3A
> >>>
> >>
> >>
> >>
> >