They also are known for breaking in the ballum area, I had one do
that to me though the new one hasn't been too bad yet knock on wood.
I'll fix my old one soon though just in case.At 11:43 PM 04/02/2006, you wrote:
>Hi.
>
>That is correct, because anything that changes the dielectric constant
>between the two conductors affects the impedance of the transmission line
>and probably the velocity factor as well, and it affects the way that it
>tunes. Proximity to other metal objects such as other antennas, chain link
>fences, and even aluminum siding on houses can cause all kinds of problems
>with this type of antenna. I have even found that because this is
>essentially a reactive load, even the length of the coax can make a big
>difference. I had trouble with mine on 15 meters until I added 10 feet of
>coax! That is why there is a recommendation to get it as far up in the air
>as possible. Many of these variables become insignificant if you can get
>it way up there, but if you can't (like myself) then you just fudge with it
>until you strike a happy medium that you can live with. A 9 to 1 SWR is
>pretty high, but some manual tuners can still handle that.
>
>Also, I've discovered that after a couple of years the wire that they use
>in some of these G5RVs can stretch pretty significantly. Mine moved so
>much that the resonant point was at 3.2 MHz on 80 meters! I am in the
>process of redoing mine with copper weld wire which tends to stretch less.
>
>73, de Lou K2LKK
>
>At 07:47 PM 4/2/2006 -0700, you wrote:
> >Hi
> >
> > This sounds a little strange but you might try cleaning the
> latter line.
> >I have heard that can be an issue with this type of feed line.
> >
> > God bless,
> > Mark WZ0K
> >God loves you!
> >My personal prayer book.
> >Add your prayer or pray for others at the following link.
> >http://prayerbook.homewithgod.com/cgi-bin/prayerbook/multi.pl?13196
> 1113534708:24:0
> >
> >http://lists.topica.com/lists/funhamradio.
> >http://groups.google.com/group/funhamradio-list
> >
> >http://funhamradio.bloki.com
> >----- Original Message -----
> >From: "Louis Kim Kline" <[log in to unmask]>
> >To: <[log in to unmask]>
> >Sent: Sunday, April 02, 2006 2:06 PM
> >Subject: Re: antenna problem
> >
> >
> > > Hi Tom.
> > >
> > > Yes, I think that brushing up the R7 to get the corrosion out of the
> > > joints
> > > could make quite a difference. It's probably a first step in trying to
> > > get
> > > that antenna going. As for the antenna tuner in the TS850S, if it is
> > > anything like the auto tuner in the TS450S and TS690S, it is probably a
> > > pretty tolerant antenna tuner. I personally think that the AT450 that is
> > > used in the two radios that I just mentioned is a real gem, and it
> > > sometimes even outperforms the MFJ993 tuner that I have. Keep in mind
> > > that
> > > when trying to debug the G5RV, the ladder line cares a lot more
> about what
> > > is around it than coax fed antenna systems do, so try to look and see if
> > > there are any metal objects near it that could be affecting it. G5RVs
> > > work
> > > best when they are up in the free and clear, but few of us have that
> > > luxury.
> > >
> > > 73, de Lou K2LKK
> > >
> > >
> > >
> > > At 12:54 PM 4/2/2006 -0700, 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
> > >
> > > Louis Kim Kline
> > > A.R.S. K2LKK
> > > Home e-mail: [log in to unmask]
> > > Work e-mail: [log in to unmask]
> > > Work Telephone: (585) 697-5753
> > >
>
>Louis Kim Kline
>A.R.S. K2LKK
>Home e-mail: [log in to unmask]
>Work e-mail: [log in to unmask]
>Work Telephone: (585) 697-5753
|
