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For blind ham radio operators <[log in to unmask]>
Date:
Tue, 21 Aug 2012 23:07:21 -0400
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i have had trouble with barol connecters. that might be your problem.  you 
need good ones.  not cheap ones.
----- Original Message ----- 
From: "John Miller" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Tuesday, August 21, 2012 9:53 AM
Subject: Re: G5RV Update


> I'm with you there, I'd really recheck all coaxes, all connections, move
> things around while checking them, see if there's something somewhere that
> shorts under certain conditions. Close proximity to metal shouldn't 
> measure
> a CD short, it won't work with RF very well, don't I know that, but it
> shouldn't measure a short.
> ----- Original Message ----- 
> From: "Pat Byrne" <[log in to unmask]>
> To: <[log in to unmask]>
> Sent: Tuesday, August 21, 2012 8:02 AM
> Subject: Re: G5RV Update
>
>
>> But if Tom took the reading with the coax disconnected, he wouldn't
>> be connected to the R V ground so shouldn't have seen the results he
>> saw.  And for the life of me I don't understand how mere proximity
>> could cause a direct D C short.
>> Puzzling.
>> PatAt 05:24 AM 8/21/2012, you wrote:
>>>Tom,
>>>
>>>If all the components of the G5 are insulated, I don't see how the 
>>>antenna
>>>being in the proximity of the metal roof or one of the legs wrapped 
>>>around
>>>a
>>>metal ladder leg could cause continuity between the two sides of the
>>>antenna.  I do believe that the antenna wrapped around the ladder leg
>>>would
>>>most definitely detune it though.
>>>
>>>Now, if the ladder is connected to ground, perhaps through the metal 
>>>frame
>>>of the R V and the AC power system, and your G5 was actually connected to
>>>the ladder through a break in the insulation on the antenna wire and the
>>>shield side of your coax wiring in your RV is connected to that same 
>>>power
>>>line ground than you could read a possible short if the ladder side of
>>>your
>>>G5 was the center of the coax feed line.
>>>
>>>I don't know anything about RV construction, however if the AC 
>>>receptacles
>>>are mounted in metal electrical boxes and the electrical boxes are 
>>>mounted
>>>to a metal RV frame then the whole metal frame of the RV would be
>>>connected
>>>to the power line ground because the mounting ears of normal household
>>>type
>>>receptacles are connected to ground.
>>>
>>>I know that was poorly written, but read it slowly and I think you will
>>>understand my thoughts.
>>>
>>>73
>>>
>>>Howard #3
>>>
>>>
>>>
>>>
>>>
>>>----- Original Message -----
>>>From: "Tom Behler" <[log in to unmask]>
>>>To: <[log in to unmask]>
>>>Sent: Tuesday, August 21, 2012 4:42 AM
>>>Subject: Re: G5RV Update
>>>
>>>
>>> > Great suggestion, Howard, and I will definitely carry it out.
>>> >
>>> > Thanks very much.
>>> >
>>> > Tom Behler: KB8TYJ
>>> >
>>> > ----- Original Message -----
>>> > From: "Howard, W A 9 Y B W" <[log in to unmask]>
>>> > To: <[log in to unmask]>
>>> > Sent: Monday, August 20, 2012 9:54 PM
>>> > Subject: Re: G5RV Update
>>> >
>>> >
>>> >> Tom,
>>> >>
>>> >> While you have the antenna down, do the following:
>>> >>
>>> >> 1.  Check for continuity from the center pin of the coax connector on
>>> >> the
>>> >> coax pigtail to each end of the antenna's horizontal elements there
>>> >> should
>>> >> be continuity to one of them.
>>> >>
>>> >> 2.  Now do the same from the shield side of the coax connector on the
>>> >> coax
>>> >> pigtail and you should have continuity to the end of the opposite 
>>> >> leg.
>>> >>
>>> >> Alternatively, you could connect the ends of the antenna horizontal
>>> >> legs
>>> >> together if possible and than check for a short across the coax
>>> >> connector
>>> >> on
>>> >> the end of the coax pigtail.
>>> >>
>>> >> I am only suggesting this so that you will know that there are no
>>> >> breaks
>>> >> in
>>> >> the connections at each end of the ladder line.  Can only do this on
>>> >> the
>>> >> ground. Impossible to do with the antenna in the air.
>>> >>
>>> >> 73
>>> >>
>>> >> Howard #3
>>> >>
>>> >>
>>> >>
>>> >>
>>> >>
>>> >>
>>> >> ----- Original Message -----
>>> >> From: "Tom Behler" <[log in to unmask]>
>>> >> To: <[log in to unmask]>
>>> >> Sent: Monday, August 20, 2012 8:05 PM
>>> >> Subject: G5RV Update
>>> >>
>>> >>
>>> >>> Hi, all.
>>> >>>
>>> >>> Well, tonight, with a little bribery in the form of an ice cream 
>>> >>> cone
>>> >>> on
>>> >>> the
>>> >>> way out to the RV, the XYL and I took the trip to retrieve the
>>> >>> suspect
>>> >>> G5RV.
>>> >>>
>>> >>> The antenna is now right here in front of me, and guess what I 
>>> >>> found!
>>> >>>
>>> >>> With the antenna taken down, and now free of any connections, there
>>> >>> is
>>> >>> an
>>> >>> open circuit across the PL259!  In other words, no continuity across
>>> >>> the
>>> >>> connector!
>>> >>>
>>> >>> So, to me, this would indicate that the antenna is sound
>>> >>> electrically.
>>> >>>
>>> >>> Before putting it up again, of course, I will check all connections,
>>> >>> but
>>> >>> this, to me, is very encouraging.
>>> >>>
>>> >>> It also indicates to me that there is a problem somewhere in my feed
>>> >>> line
>>> >>> system, hopefully not in the feed line that runs underneath the RV.
>>> >>>
>>> >>> At least, though, I think I've now got the problem isolated in a
>>> >>> major
>>> >>> way.
>>> >>>
>>> >>> Will keep everyone posted, but, unless I'm deluding myself, I'm now
>>> >>> greatly
>>> >>> encouraged.
>>> >>>
>>> >>> 73 from Tom Behler: KB8TYJ
>>> >> 

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