well, considering you checked where the coax connects to the latter line and 
found a short, then the short is at one end of the coax/latter line run, or 
the other.
I'm going to throw my bet behind the pl259 connecter being the culprit here.
A real easy way to check without chopping the connecter off, is as Pat says, 
disconnect the pig tail coax from the latter line, then test the pig tail by 
itself, and test the latter line and antenna by itself.
If the pig tail shows a short, then it's your pl259 connecter, if the latter 
line still has continuity, then it's something shorting in that direction.
You don't even need to take the antenna down and go through all that hassle. 
Just do it this way on the ground and you'll be able to quickly determine 
where the short is occuring.
If it's the pig tail connecter, then you can chop it off and put a new one 
on.  If it's showing a short across the end of the latter line, then you 
will most certainly have to take the antenna down and look for it up the 
line somewhere.
And I would definitely disconnect all antennas and recheck your coaxial 
feeds from your operating position up to the connections on the top of your 
RV...just to insure that there isn't something shorting out there.
I think you said you did that and found everything to be good, but double 
check.
I don't want to be insulting, but when you use your continuity meter, you 
are getting a solid tone when you test the g5RV right? the solid tone 
indicates continuity or a dead short...if it doesn't emit a tone, then it's 
open, no short.
Just trying to insure all the steps and procedures are correct.

73
Colin, V A6BKX
----- Original Message ----- 
From: "Tom Behler" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Sunday, August 19, 2012 6:15 PM
Subject: Re: G5RV Disappointment


>    Colin:
>
> Unfortunately, I don't have the antenna here, but the center insulator is 
> a
> long piece of plastic about four inches long, about an inch and a half 
> wide,
> and about an inch thick.  I'm not sure how the legs of the antenna are
> fastened to that insulator, nor am I sure how the connections are 
> configured
> and kept in place.  I will check on that when I get the antenna, hopefully
> sometime this week.
>
> I appreciate your interest in this problem, and will keep you posted just 
> as
> soon as I learn more.
>
> Tom Behler: KB8TYJ
>
> ----- Original Message ----- 
> From: "Colin McDonald" <[log in to unmask]>
> To: <[log in to unmask]>
> Sent: Sunday, August 19, 2012 8:08 PM
> Subject: Re: G5RV Disappointment
>
>
>> tom, what I meant was at the point where the latter line splits into the
>> two
>> wire elements of the antenna.
>> The g5RV's I've seen usually have some kind of insulator plate where the
>> connection between the legs of the antenna, and the latter line are done.
>> Usually a couple bolts with nuts for the connections, or in the case of
>> the
>> MFJ products, a circuit board where the latter line ends, and the legs of
>> the antenna begin.
>> That was kind of what I would suspect since yu were able to thoroughly
>> check
>> the radio end of the latter line and coaxial pigtail and found little or
>> nothing that would indicate a short.
>> On the home brew G5RV that we made for our camping trip earlier this 
>> year,
>> we used a couple small plates of plexy glass sandwiched together, and 
>> some
>> stainless bolts and nuts, along with some ring terminal connecters to 
>> both
>> strain relief the latter line, and give a good solid center insulator for
>> the legs of the antenna.
>> I wonder what you used for your center insulator and connection point on
>> your antenna??
>>
>> 73
>> Colin, V A6BKX
>